Electronics

Stages magnet-free Speed sensors fit to your hub to provide real-time, accelerometer-based speed data to your cyclometer or phone via ANT+ and Bluetooth Smart. - Compatible with most wheels - Installs/removes in seconds - IPX7 Water Resistant - Super light—just 8 grams - Runtime: 600 hours - Operating range: 2-60 mph - Blue and red LEDs indicate pairing, activation, and low battery status

The Stages Spindles "G" bottom bracket spindle allows the retrofit of the carbon Stages Power meter for SRAM BB30 DUB MTB cranksets. The spindle is manufactured for Stages Cycling by Full Speed Ahead, forged and machined out of aluminum to allow for the carbon Stages Power meter for FSA 386 EVO and Stages Carbon 30mm model to be used with SRAM DUB MTB. The Stages Power meter 30mm spindle is specifically designed to meet or exceed the performance of the manufacturer's stock component, while allowing the retrofit of the new carbon Stages Power Meter to a rider's SRAM drivetrain. - Spindle only

Securely holds your Turbo Connect Display/Speedzone 2 computer. - Specialized Turbo Connect Display mount. - Left- and right-side compatible. - Mountain bike design situates a CPU above stem. - Fits 35mm handlebars.

Securely holds your Turbo Connect Display/Speedzone 2 computer. - Specialized Turbo Connect Display (TCD)/Speedzone 2 Display mount. - Left- and right-side compatible. - MTB-style above-the-stem mount.

Securely holds your Turbo Connect Display/Speedzone 2 computer. - Specialized Turbo Connect Display (TCD)/Speedzone 2 Display mount. - Left- and right-side compatible. - Road-style above-the-stem mount.

Kit containing all replaceable items for the Specialized power meter pod. - White silicone O-ring. - Two M3x5 stainless steel screws.

SL Range Extender Cable 285mm MTB

Charge your Specialized Turbo battery with this high output, custom Li-ion charger. • Custom Specialized Li-ion battery charger • Output: 42V4A • Compact design while delivering huge power • With Rosenberger plug and light indication of the charging status

Whether it's just having a second battery for peace of mind, or for carrying on a ride you know is going to require a bit more juice, Specialized's Turbo SC battery has a long lifecycle for that extra distance. It charges super fast and has a massive 691Wh capacity. - Custom Li-Ion battery for Turbo. - 691Wh capacity (60 cells x 3.2Ah) with ANT/BT module to connect to external devices. - Allows super-fast charging times and a long life cycle.

It looks like it’s from the future, but it’s here now. Our lightest, stiffest, and most accurate integrated power meter and chainring combo is now on Force. Quarq D-Zero technology is accurate to +/-1.5% and isn’t affected by temperature changes, and the consistent 13-tooth gap on the rings ensures fast and reliable shifting. Not just unbeatable on performance, our integrated rings are also incredibly long-lasting. And let’s not be modest: the combination of these rings on our iridescent carbon crank arm is the best looking thing out there. FEATURES - X-Range gearing technology gives you more range and a smoother gear progression, so you’re always in the right gear - Power meter is fully integrated into the chainring set for lighter weight - Power readings are accurate within +/-1.5% and aren’t affected by climate conditions during a ride - Measures right and left leg power balance - Unique chainring shape results in a lighter weight, stiffer, more durable crankset - DUB bottom bracket adds durability and simplicity

The QuickView was designed to put the Garmin Edge Computer out in front of the stem. Fits Garmin 605 and 705. - Glass-filled nylon, stainless steel Torx T25 bolt - Weight: 20g

In certain disciplines, the single-ring drivetrain reigns supreme. Championing simplicity, strength and durability, the SRAM RED 1 AXS power meter meets the demands of triathletes, time trialists and cyclocross racers. The power meter features improved aerodynamics thanks to direct mount aero chainrings with fully integrated power, and the tighter gearing range is perfect for racing and flatter terrains. - Single-ring drivetrain simplifies functionality - 48T and 50T variants have fully integrated power into a direct mount aero chainring - 36-46T variants have spider-based power - Chainrings can be easily changed without requiring recalibration of the power meter - Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride - Power balance measures left and right legs separately - SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control - Laser-etched chainring finish is more durable - DUB bottom bracket adds durability and simplicity - Non-aero chainrings can be installed with a single tool, making gearing changes a breeze - Bottom bracket not included - BB Compatibility: All SRAM Road DUB BBs - BB Spindle Interface: DUB - Chainring material: Aluminum - Crank arm material: Carbon - Power Meter Type: ANT+ and BLE

- AXS enabled for easy monitoring and firmware upgrades - Fully integrated power meter into a direct mount chainring - Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride - Power balance measures left and right legs separately - SRAM X-SYNC wide-tooth, narrow-tooth chainring technology provides maximum chain control - Laser-etched chainring finish is more durable - 8-bolt direct mount compatibility only to RED and Force eTap AXS cranks. - Speeds: 12 - Chainring material: Aluminum - Power Meter Type: ANT USB

The SRAM RED AXS power meter breaks with tradition — and breaks through to new levels of performance. SRAM reengineered road gearing: reducing front chainring size and adding more range to the rear cassette. They also maintained a 13-tooth delta on all chainring pairs, ensuring precise shifting for any setup. This results in more useful gearing and better shifting across all configurations. These power meters are also designed with Quarq's premier DZero power measurement technology fully integrated into the crankset. Welcome to the pinnacle of the power meter. - X-Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear - Integrated power measurement - Power meter is fully integrated into the chainring set for lighter weight - Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride - Power balance measures left and right legs separately - Improved front shifting performance for crisp and accurate front shifts - Unique chainring shape results in a lighter weight, stiffer, more durable crankset - Integrated chainring design significantly reduces weight - DUB bottom bracket adds durability, simplicity and broad compatibility - Speeds: 12 - BB Compatibility: All SRAM Road DUB BBs - BB Spindle Interface: DUB - Chainring material: Aluminum - Crank arm material: Carbon - Power Meter Type: ANT+ and BLE - Bottom bracket not included

Be it the fireworks of a finale, an ideal rhythm, climbing on the top, or a deep, dark place extracting the last kilojoule of effort on your bike split, you want to adjust your gear with the twitch of a finger. eTap Blip satellite shifters allow you to shift when you want, where you want. - Limitless remote shifting positions for drop and aero bars - Wired shift buttons can be positioned however the rider prefers - Connect to Blip Box or drop bar eTap levers - Compatible with SRAM RED eTap shift/brake controls

Power every ride. We've taken the reliability, elegance, and features of Quarq's legendary crank-based power meter and dropped the barrier to entry once again. This new power meter platform is entirely contained within the DUB spindle for clean integration that fits more bikes than ever. It's invisible technology that adds minimal weight and will help you get to the finish line faster, and it can be used to upgrade any eTap AXS bike. - An elegant, integrated design - DUB-PWR spindle-based unit measures left-side power to calculate total watts - Proven Quarq reliability and accuracy - Long battery life (400+ hours) to power a season of rides - User-replaceable lithium AAA battery - DUB bottom bracket adds durability and simplicity - Waterproof (IPX7 waterproof to 1 meter for 30 minutes) - Lightweight (less than 40g heavier than standard crankset) - Simple and affordable power meter upgrade option - Right Arm/BB/Spider/Chainrings NOT INCLUDED

The X0 Eagle T-Type AXS™ Wide left crankarm with Power Meter spindle provides riders with accurate, live power data delivery housed in our most advanced aluminum crankset. The power meter technology is integrated through what SRAM calls “DUB-PWR” – a unique design that elegantly houses Quarq’s reliable and accurate power measurement inside the DUB crank spindle itself. Measuring left-side power to calculate total watts, it’s subtle, lightweight, compatible with any chainring setup, and boasts unbeatable battery life. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS™ enabled components. No-compromise, no-fuss data delivery with robustness in mind. - Innovative "DUB-PWR" design allows for lightweight, subtle Quarq power integration - Compatible with RockShox Flight Attendant - Unique, groundbreaking design integrated with one of the lightest aluminum cranksets on the market - +/-3% accuracy means you'll always know your true watts output - Long battery life provides 400+ hours of usage - Waterproof (IPX7 waterproof to 1 meter for 30 minutes - Right arm, Bottom bracket, Chainring and Spider NOT included

The XX Eagle T-Type AXS™ Wide left crankarm with Power Meter spindle utilizes SRAM's World stage proven XX crank arm with a subtly integrated power meter to record and deliver live, accurate power readings to your head unit. We achieve this by utilizing what SRAM calls “DUB-PWR” – a unique design that elegantly houses Quarq’s reliable and accurate power measurement inside the DUB crank spindle itself. Measuring left-side power to calculate total watts, it’s subtle, lightweight, compatible with any chainring setup, and boasts unbeatable battery life. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS™ enabled components. No-compromise, no-fuss data delivery giving you an edge over the competition. - Innovative "DUB-PWR" design allows for lightweight, subtle Quarq power integration - Compatible with RockShox Flight Attendant - +/-3% accuracy means you'll always know your true watts output - Long battery life provides 400+ hours of usage - Waterproof (IPX7 waterproof to 1 meter for 30 minutes - Right arm, Bottom bracket, Chainring and Spider NOT included

The XX SL Eagle AXS Transmission Power Meter Crankset combines the XX SL crank arm with an integrated power meter. All-new spider design uses a proprietary chainring mount system which reduces weight without compromising reliability. Dual sided power measurement calculates total watts. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components. - Compatible with Flight Attendant. +/- 1.5% accuracy. - User replaceable CR2032 battery 200-hour battery life. - Bluetooth low energy technology and ANT+ wireless data transfer. - AxCad -- no cadence magnet required. - Waterproof (IPX7 waterproof to 1 meter for 30 minutes). - SRAM Model ID: FC-XX-SLP-D1

Ride with confidence knowing that your power meter will not quit when you need it the most. Enjoy up to 200 hours of ride time in any weather condition with its IPX7 waterproof rating and 10k temperature compensation; if harsh climates do not hold you back, then you need a product capable of rising to the occasion. That is exactly what the DZero DUB power meter is made for. Train harder, ride faster and unlock your ultimate potential.  - Specifically designed for use with XX SL Eagle T-Type Thread Mount chainrings (Sold separately) - AXS™™ enabled for easy monitoring and firmware upgrades - Bluetooth Low Energy and ANT+ compatible - Power readings are accurate within +/-1.5% and aren't affected by climate conditions during a ride - Uses a common CR2032 battery that last for 200 riding hours and changes without tools - Power-upgrade compatible with the following RED® and Force eTap AXS™™ cranksets: RED 1x: 36T-46T, Force 1x: 36T-46T, Force 2x: 33/46, 35/48

Enjoy the ultimate advantage of freedom and adventure that Eagle provides combined with the Quarq power meter platform that delivers on accuracy and reliability. The SRAM Eagle XX1 power meter is built to pair with the SRAM Eagle drivetrains, providing a significantly quieter performance and extraordinary durability. Take it on the dirtiest, gnarliest trails while maintaining confidence in your cycling components. You came to perform; the Eagle XX1 power meter will perform with you. You are working hard, pushing yourself to new heights in some of the toughest conditions. Ride with confidence knowing that your power meter will not quit when you need it the most. Enjoy up to 200 hours of ride time in any weather or trail condition with its IPX7 waterproof rating and 10k temperature compensation; if harsh environments do not hold you back, then you need a product capable of rising to the occasion. The Eagle XX1 power meter is designed to be rough-and-tumble tough. Train harder, ride faster and unlock your ultimate potential. The Eagle XX1 power meter brings simplicity and ease-of-use to your training. With MagicZero automatic calibration, there is no need to worry about calibrating before you ride; just jump on your bike and go. The Eagle XX1 also features Bluetooth low energy and ANT+ wireless data transfer, delivering power output information directly to your cycling computer. - Speeds: 11/12 - BB Compatibility: DUB:BSA73, PF89.5, PF92, PF30 MTB73, BB30 MTB73, BSA MTB68SP - Bolt Circle Diameter (BCD): 104 BCD - Chainline: 52.0mm - BB Spindle Interface: DUB - Power Meter Type: ANT+ and BLE - Crank Arms/Chainrings not included

External Blip mount for aero extensions and base bars - 360 degree rotation for adjustment - Aero use only to fit 22.2mm OD bar 65mm in length - Fits all Zipp aero extensions and base bars - Blips not included - Weight: 57 grams for pair (does not include Blip) - Material: Polypropylene + TPE - Compatibility: 11-speed - Recommended Group: SRAM RED eTap

Reach new goals and explore new roads with a power meter that delivers on accuracy, durability, and reliability. The Quarq DZero DUB Power Meter is paired with the Quarq DUB Crankarms and SRAM’s X-Glide 52/36t chainrings to have the perfect fit for most 10- or 11- speed groupsets. A SRAM DUB Bottom Bracket will be required for installation. FEATURES - Bluetooth low energy technology and ANT+ wireless data transfer - MagicZero - automatically checks and recalibrates your power meter as you ride – no need to manually calibrate - AxCad -- no cadence magnet required - 10K Temperature Compensation - Battery -- CR2032, 200-hour battery life, change without tools - OmniCal -- swap chainrings without affecting accuracy - 2-year warranty - IPX7 waterproof rating - Accuracy -- within 1.5%, measuring both legs. SPECIFICATIONS - Speeds: 11 - Crank arm length: 170mm, 172.5mm, 175mm - BB Compatibility: All SRAM Road DUB BBs - Chainring Size: 52/36T - Bolt Circle Diameter (BCD): 110 BCD - Chainline: n/a - BB Spindle Interface: DUB - Chainring material: Aluminum/Aluminum - Guard: No Guard - Crank arm material: Carbon - Color (Crank arm): Natural carbon - Power Meter Type: Spider

Reach new goals and explore new roads with a power meter that delivers on accuracy, durability, and reliability. The DFour DUB was designed specifically for Dura-Ace R9100 chainrings. Train using a Quarq power meter without changing your drivetrain. You are working hard, pushing yourself to new heights in some of the toughest conditions. Ride with confidence knowing that your power meter will not quit when you need it the most. Enjoy up to 200 hours of ride time in any weather condition with its IPX7 waterproof rating and 10k temperature compensation; if harsh climates do not hold you back, then you need a product capable of rising to the occasion. That is exactly what the DFour DUB power meter is made for. Train harder, ride faster, and unlock your ultimate potential. The DFour DUB power meter brings simplicity and ease-of-use to your training. With MagicZero automatic calibration, there is no need to worry about calibrating before you ride; just jump on your bike and go. DFour DUB features Bluetooth low-energy and ANT+ wireless data transfer, delivering power output information directly to your cycling computer. Features - Bluetooth low-energy technology and ANT+ wireless data transfer - MagicZero - automatically checks and recalibrates your power meter as you ride – no need to manually calibrate - AxCad - no cadence magnet required - 10K Temperature Compensation - Battery - CR2032, 200-hour battery life, change without tools - OmniCal - swap chainrings without affecting accuracy - 2-year warranty - IPX7 waterproof rating - Accuracy - within 1.5%, measuring both legs

Profile Design's UCM XL Universal Computer Mount provides a convenient 60mm-long place to mount your computer on your aero bars. It installs without tools, stays put and can be positioned as needed for easily viewing and controlling your computer.

22mm Wrist Band

22mm Wrist Band - Silicone

Thanks to its adjustable, aerodynamic and slim design, Polar's Adjustable Front Bike Mount is a perfect fit for challenging rides. It gives you the best viewing angle and easy access to your bike computer at all times. Plus it only takes up a small space on your handlebar. You can attach the unit in any direction you'd like–either around the handlebar or the stem of your bike. The front bike mount is optimized for the standard 31.8 mm diameter handlebar.

CADENCE SENSOR BLUETOOTH® SMART Boost your cycling performance and find out what your most efficient pedaling rate is. The sensor works with Bluetooth® Smart technology and consumes only a little energy. You can later analyze your training at the Polar Flow web service. - Compatible with dozens of leading fitness apps - Small and light design with firm bike attachment - Compatible with iPhone 4S and later, and with selected Android devices including Samsung Galaxy S3 and S4 using Android 4.3 or later.

Charging Cable 2Nd Gen

Stay true to your style – this crystal wristband puts the finishing touch to any look. Beautifully embellished with real crystals from Swarovski®. Fits all Polar fitness watches with 20 mm wristbands. The quick-release spring bars make the swap go smoothly. Materials: - Wristband: Comfortable & durable fluoroelastomer - Buckle: Stainless steel Compatible products: - Polar Ignite 2 - Polar Ignite - Polar Unite

RIDE SMARTER. RIDE WITH DATA. Roads or single track trails? Either way – we got you covered. Gear up for your rides with our top GPS multisport watches, now paired with a set of exclusive high quality accessories for cyclists. POLAR GRIT X OUTDOOR MULTISPORT WATCH Polar Grit X is the outdoor multisport watch designed for the moments when the road is not enough and new goals are waiting off the beaten track. Included in the bundle: Polar H10 heart rate sensor, a bike mount for the watch, and an exclusive saddle bag.

Premium Outdoor Multisport Watch Built for military-level durability with sapphire glass and ultra-long battery life. Polar Grit X Pro equips you with new navigation tools, always-on outdoor features and Polar's ultimate training solutions so you can go wherever your heart takes you.

Premium Outdoor Multisport Watch Built for military-level durability with sapphire glass and ultra-long battery life. Polar Grit X Pro equips you with new navigation tools, always-on outdoor features and Polar's ultimate training solutions so you can go wherever your heart takes you.

OUTDOOR MULTISPORT WATCH WITH GPS AND ALL ESSENTIAL TRAINING FEATURES The Polar Grit X outdoor multisport watch is an uncompromising combination of rugged and durable, yet lightweight design, top training features and the possibilities of Polar Flow, the ultimate training platform. Polar Grit X comes with built-in GPS, compass and altimeter in training mode, and Polar’s unique Smart Coaching features that make sure you’re ready for your future adventures.

POLAR LEATHER WRISTBAND 22 MM Make your Polar sports watch ready for any occasion with a genuine leather wristband. The elasticated section under the buckle ensures a secure and comfortable fit around your wrist. Swap the band easily with the help of the quick-release spring bars. Compatible products: - Polar Grit X - Polar Vantage M Materials: - Wristband: genuine vegetable-tanned leather - Elasticated section: polyester and elastane (latex-free) Sizing: - M/L: wrist circumference 145-215 mm

POLAR H10 HEART RATE SENSOR When it comes to accuracy and connectivity, Polar H10 heart rate sensor is the go-to choice. Monitor your heart rate with maximum precision and connect your heart rate to a great variety of training devices with Bluetooth® and ANT+. With Polar H10, heart rate monitoring is more accurate and adaptable than ever.

FOR ALL YOUR EVERYDAY SPORTS When you're looking for a reliable high quality heart rate chest strap, Polar H9 fulfills all your needs and more. Bluetooth® and ANT+ technologies open up endless connection possibilities to any app or device you want to use. All you need to do is get connected & get going.

FITNESS WATCH WITH GPS AND SMART FEATURES The Polar Ignite 2 fitness watch is sleek, simple and smart. Get personalized guidance for workouts, recovery and sleep – in a beautifully designed watch that looks and feels good 24/7.

FITNESS WATCH WITH GPS AND SMART FEATURES The Polar Ignite 2 fitness watch is sleek, simple and smart. Get personalized guidance for workouts, recovery and sleep – in a beautifully designed watch that looks and feels good 24/7.

All-new design Smart and beautiful, Polar Ignite 3 is designed for active lifestyles. The sleek aesthetics and soft edges create a seamless screen experience. A stainless-steel bezel surrounds the curved, durable Gorilla Glass lens that protects a bright, vivid AMOLED touchscreen display that is easy to read in all conditions, both indoors and outdoors. Polar Ignite 3 introduces customizable quick-access widgets that give instant access to the information that matters the most, including weather, heart rate data, activity summary, and more. With these widgets, users can personalize the watch face to suit a range of different colors, styles, and even matching wristband. - SleepWise™: An analysis of how sleep affects the day with detailed forecast of daytime alertness levels, plus an estimate of when the body is ready to fall asleep. - Nightly Recharge™: An overnight recovery measurement that shows how well a person recovers from stress, and other demands of the day. - Sleep Plus Stages™: Automatic sleep tracking tool that shows the amount and quality sleep, and the time spent in each sleep stage. - Serene™: A guided deep breathing exercise that helps you relax your body and mind and manage stress. - Polar Precision Prime™ Sensor Fusion Technology: Advanced optical heart rate tracking technology.

Polar Ignite 3 Titanium is a stylish fitness & wellness watch that helps you live a more energized life. It tracks your sleep, activity, and heart rate to provide guidance that’s tailored to your body and lifestyle.

POLAR IGNITE SILICONE WRISTBAND Bring a fresh touch to your style with a changeable wristband for your Polar Ignite fitness watch. Choose from classic black, elegant white, vibrant yellow or energetic orange. Sizing: S: wrist circumference 130-185 mm M/L: wrist circumference 155-210 mm

CHANGEABLE M200 WRISTBAND Blend Polar M200 with your personal style – either choose your signature color or alternate to suit your mood or outfit. Choose from Black, White and Fresh Blue. - Small/Medium: 135–170 mm - M/L: 150–210 mm Measure the circumference of your wrist, then choose the right wristband size.

M430 USB CABLE With this USB cable you can charge your Polar M430 and sync your activity and training data with the Polar Flow web service.

M430 Wristband

FOR ALL YOUR SPORTS ON LAND AND IN WATER Polar OH1 is an optical heart rate monitor that combines versatility, comfort and simplicity. You can use it both as a standalone device and pair it with various fitness apps, sports watches and smart watches, thanks to Bluetooth® and ANT+ connectivity. The Polar OH1 + product package includes a swimming goggle strap clip for easy use in the pool.

Ohr Sensor Charging Adapter

GPS Running Watch This is a no-nonsense GPS running watch that gives the modern runner all the essentials, plus the specialized training tools they need to do one thing better: Run.

Advanced GPS Running Watch This is an ultra-light, new-generation GPS running watch with integrated barometer that equips serious runners with advanced training tools to improve running economy and performance. Make every run a good run.

Advanced GPS Sports Watch This is an ultra-light, new-generation sports watch with integrated barometer that equips athletes with advanced tools to improve running economy, training sessions, and sports performance.

Pacer Pro Wrist Band

Pacer Wrist Band 20mm

POLAR ADJUSTABLE BIKE COMPUTER MOUNT Polar adjustable bike computer mounts fit firmly around the handlebars or stem of basically any bike, without leaving any marks on it. With the quick-release locking mechanism, you can easily steer your bike with one hand and rotate your bike computer in any direction you'd like with the other.

BIKE MOUNT FOR POLAR SPORTS WATCHES Turn your Polar sports watch into a versatile cycling partner – mount your sports watch to your bike handlebar and easily follow your data during your rides. Compatible with all Polar sports watches*. *Please keep in mind that wrist-based heart rate is not available while your sports watch is attached to the bike mount – you will need a separate heart rate sensor, such as Polar H10.

Polar Cable Charging Usb-C Gen 2

SPEED SENSOR BLUETOOTH® SMART Boost your cycling performance with our cycling speed sensor and measure your speed and distance accurately. The sensor works with Bluetooth® Smart technology and consumes only a little energy. You can later analyze your training in the Polar Flow web service.

SPEED SENSOR BLUETOOTH® SMART AND CADENCE SENSOR BLUETOOTH® SMART SET Boost your cycling performance with our cadence and cycling speed sensors: find out what your most efficient pedaling rate is and measure your speed and distance accurately. The sensors included in this set work with Bluetooth® Smart technology and consume only a little energy. You can later analyze your training at the Polar Flow web service. - Small and light design with firm bike attachment - Compatible with iPhone 4S and later, and with selected Android devices including Samsung Galaxy S3 and S4 using Android 4.3 or later.

Polar Pro Strap works with all Polar heart rate sensors. With a soft textile material, slip-preventing silicone dots, and a secure buckle, the strap is very comfortable to wear and stays in place even through your most intense workouts. The extra interference-preventing electrodes on the strap make it extremely sensitive to your heart’s electrical signals, providing maximum precision for heart rate readings and eliminating interference. - X-Small/Small: 51-66 cm - Large/X-Large: 65-93 cm - XXXL: 76-116 cm

Freshen up the look of your Polar sports watch with a new silicone wristband. The quick release spring bars make the band quick and easy to swap anytime, anywhere. Compatible products: - Polar Grit X - Polar Vantage M Made of comfortable and durable silicone. Sizing: - S: wrist circumference 130-190 mm - M/L: wrist circumference 145-215 mm