Pirelli Cinturato Velo TLR Road TyreComing equipped with a SmartNET Silica rubber compound, this tubeless-ready road bike clincher tyre offers high levels of wet grip, comfort, mileage and puncture resistance for tackling every mile of road. Pirelli has also kitted it out with an Armour Tech construction that uses several layers from the inside to the outside to protect against punctures on your journey. With a high-density nylon layer belt extended from bead to bead, all the way around the casing and underneath the tread as well as an aramid breaker, this model provides excellent shielding against sharp objects while adding support for low-pressure riding. Coming complete with tubeless-ready technology, you'll also enjoy tubeless benefits such as the ability to run lower pressures for lower rolling resistance, increased grip and a reduced risk of flats or punctures.Pirelli's experience and the reliability of SmartNET Silica technology combined with the tubeless-ready comfort and the resistance of the Armour Tech technology facilitated the creation of a clincher tyre with a unique DNA, perfect for long distances and various terrains.Features: Compound: SmartNET Silica Puncture Protection: Aramid Fibre Casing: Nylon Use: Road Technology: Armour Tech TPI: 60tpi Tubeless Ready: Yes Single or Pair: SingleTechnologies: Armour Tech: Armour Tech construction (patent pending) combines various components, in order from inside to outside, which add to the 60 TPI Nylon casing underneath: High-density Nylon layer from bead to bead, which protects against cuts as well as improved stability at low-pressure riding and contributes to making the carcass airtight when used with liquid sealant. High density waved aramid fiber breaker belt placed underneath the tread, which provides protection against punctured and sharp object cuts. Aramid fibres dispersed into the tread rubber compound (SmartNET Silica) in two layers: an outer one (cap) which grants performances (dry & wet, mileage, contact feeling), an inner one (base) which, thanks to a higher gradient of those fibrils, slows down the penetration of foreign bodies towards underneath layers. SmartNET Silica Compound: Made from Pirelli's innovative SmartNET Silica and ICS and FGD technologies, Cinturato provides all-round cycling excellence. Thanks to its nano-rod conformation and the resulting network generation, coupled with the natural chemical water affinity of the Silica itself, it solves the traditional trade-off of rubber compounds, ranking high on opposite features such as rolling and wet grip, mileage and puncture protection. SmartNET Silica rubber compound guarantees safe rides and confidence-inspiring handling even in harsh conditions. Tubeless Ready Bead Profile: A specific shape of the bead profile which matches with tubeless-ready rim hooks, plus a specific bead material and specification that allows for easy mounting with the inner tube while keeping proper tubeless bead engagement if used with a sealant in a fully tubeless ready configuration. Bead To Bead: A high-density nylon layer belt extended from one bead to the other, all the way around the casing and underneath the tread and an aramid breaker, to protect the casing from sharp objects and provide support for low-pressure riding: Nylon is a fibre with high cut and abrasion resistance and high tensile strength. Its lightweight nature and high density also helps make the tyre airtight combined with sealant use in tubeless-ready configuration. A specific shape of the bead profile which matches with tubeless-ready rim hooks, plus a specific bead material and specification that allows for easy mounting with the inner tube while keeping proper tubeless bead engagement if used with a sealant in a fully tubeless ready configuration. Breaker: An aramid fiber belt located underneath the tread in order to protect the casing from sharp objects: aramid is a fiber with high cut and abrasion resistance. Its light weight and flexibility also ensure rolling efficiency and overall performance of the tyre.Manufacturer's Part Number: 3756500 Black 700x24cBuy Pirelli Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Pirelli Cinturato Hard Compound Gravel TyreThis versatile gravel bike tyre is engineered for performance, whether you're taking the long road home or planning a weekend epic adventure exploring countryside backroads. It features a SpeedGRIP single compound that's specifically designed to provide high levels of grip in both wet and dry conditions. This makes it ideal for delivering smooth and dependable rolling efficiency even when the elements and terrain conditions change on your gravel adventures. Pirelli has also kitted out this version with tubeless-ready technology, so you can enjoy tubeless advantages such as the ability to run lower tyre pressures for increased stability on rough terrain, lower rolling resistance and fewer risks of punctures.Gravel Bike Tyre for Hard TerrainThe Cinturato Gravel Hard Terrain is a gravel-specific tyre designed for compact terrain and the hardest surfaces. The tread features low, tightly packed knobs and an elevated ability to adapt to the terrain, offering a large contact area and therefore excellent feel while riding.SpeedGRIP CompoundThe special SpeedGRIP compound adds features of mechanical resistance and chemical grip without compromising the rolling efficiency. Cinturato Gravel Hard Terrain is a high-performance tyre with unique characteristics of grip in all weather conditions, be they dry or wet, plus a high level of puncture protection.Features: Compound: SpeedGRIP Use: Gravel TPI: 127tpi Tubeless Ready: Yes Single or Pair: Single Weight: 700x35c: 410g; 700x40c: 480g; 700x45c: 540g; 27.5"x45c: 505gTechnologies: SmartGRIP: SmartGRIP is an advanced compound developed using motorsport experience. The single compound provides constant high grip performance both in wet and dry conditions, even when the tread starts to wear.Manufacturer's Part Number: 3770900 Black 700x35c 3771100 Black 700x40c 3874500 Tan wall 700x40c 3833900 Black 700x45c 3832500 Tan wall 700x45c 3771300 Black 45c 27.5" 3874600 Tan wall 45c 27.5"Buy Pirelli Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Pirelli Cinturato Hard Compound Gravel TyreThis versatile gravel bike tyre is engineered for performance, whether you're taking the long road home or planning a weekend epic adventure exploring countryside backroads. It features a SpeedGRIP single compound that's specifically designed to provide high levels of grip in both wet and dry conditions. This makes it ideal for delivering smooth and dependable rolling efficiency even when the elements and terrain conditions change on your gravel adventures. Pirelli has also kitted out this version with tubeless-ready technology, so you can enjoy tubeless advantages such as the ability to run lower tyre pressures for increased stability on rough terrain, lower rolling resistance and fewer risks of punctures.Gravel Bike Tyre for Hard TerrainThe Cinturato Gravel Hard Terrain is a gravel-specific tyre designed for compact terrain and the hardest surfaces. The tread features low, tightly packed knobs and an elevated ability to adapt to the terrain, offering a large contact area and therefore excellent feel while riding.SpeedGRIP CompoundThe special SpeedGRIP compound adds features of mechanical resistance and chemical grip without compromising the rolling efficiency. Cinturato Gravel Hard Terrain is a high-performance tyre with unique characteristics of grip in all weather conditions, be they dry or wet, plus a high level of puncture protection.Features: Compound: SpeedGRIP Use: Gravel TPI: 127tpi Tubeless Ready: Yes Single or Pair: Single Weight: 700x35c: 410g; 700x40c: 480g; 700x45c: 540g; 27.5"x45c: 505gTechnologies: SmartGRIP: SmartGRIP is an advanced compound developed using motorsport experience. The single compound provides constant high grip performance both in wet and dry conditions, even when the tread starts to wear.Manufacturer's Part Number: 3770900 Black 700x35c 3771100 Black 700x40c 3874500 Tan wall 700x40c 3833900 Black 700x45c 3832500 Tan wall 700x45c 3771300 Black 45c 27.5" 3874600 Tan wall 45c 27.5"Buy Pirelli Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Pirelli Cinturato Hard Compound Gravel TyreThis versatile gravel bike tyre is engineered for performance, whether you're taking the long road home or planning a weekend epic adventure exploring countryside backroads. It features a SpeedGRIP single compound that's specifically designed to provide high levels of grip in both wet and dry conditions. This makes it ideal for delivering smooth and dependable rolling efficiency even when the elements and terrain conditions change on your gravel adventures. Pirelli has also kitted out this version with tubeless-ready technology, so you can enjoy tubeless advantages such as the ability to run lower tyre pressures for increased stability on rough terrain, lower rolling resistance and fewer risks of punctures.Gravel Bike Tyre for Hard TerrainThe Cinturato Gravel Hard Terrain is a gravel-specific tyre designed for compact terrain and the hardest surfaces. The tread features low, tightly packed knobs and an elevated ability to adapt to the terrain, offering a large contact area and therefore excellent feel while riding.SpeedGRIP CompoundThe special SpeedGRIP compound adds features of mechanical resistance and chemical grip without compromising the rolling efficiency. Cinturato Gravel Hard Terrain is a high-performance tyre with unique characteristics of grip in all weather conditions, be they dry or wet, plus a high level of puncture protection.Features: Compound: SpeedGRIP Use: Gravel TPI: 127tpi Tubeless Ready: Yes Single or Pair: Single Weight: 700x35c: 410g; 700x40c: 480g; 700x45c: 540g; 27.5"x45c: 505gTechnologies: SmartGRIP: SmartGRIP is an advanced compound developed using motorsport experience. The single compound provides constant high grip performance both in wet and dry conditions, even when the tread starts to wear.Manufacturer's Part Number: 3770900 Black 700x35c 3771100 Black 700x40c 3874500 Tan wall 700x40c 3833900 Black 700x45c 3832500 Tan wall 700x45c 3771300 Black 45c 27.5" 3874600 Tan wall 45c 27.5"Buy Pirelli Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.
Polar H10 N Heart Rate SensorA chest-based heart rate monitor which offers accurate heart rate monitoring using high-quality electrodes. Polar’s H10 easily connects to smartwatches, cycle computers, gym equipment and other devices via Bluetooth and ANT+ connectivity. The chest strap comes with a comfortable design that uses soft textiles and comes with an adjustable fit.FeaturesComfortable strap design utilising soft textilesHigh quality electrodes for measuring your heart rate accuratelyKeeps updating with over-the-air software updatesTwo simultaneous Bluetooth connectionsANT+ connectivityBuy Polar Heart Rate Monitors from Chain Reaction Cycles, the World's Largest Online Bike Store.
Polar H10 N Heart Rate SensorA chest-based heart rate monitor which offers accurate heart rate monitoring using high-quality electrodes. Polar’s H10 easily connects to smartwatches, cycle computers, gym equipment and other devices via Bluetooth and ANT+ connectivity. The chest strap comes with a comfortable design that uses soft textiles and comes with an adjustable fit.FeaturesComfortable strap design utilising soft textilesHigh quality electrodes for measuring your heart rate accuratelyKeeps updating with over-the-air software updatesTwo simultaneous Bluetooth connectionsANT+ connectivityBuy Polar Heart Rate Monitors from Chain Reaction Cycles, the World's Largest Online Bike Store.
Polar H9 Heart Rate SensorThe Polar H9 Heart Rate Sensor is a reliable monitor that provides high-quality heart rate date with Bluetooth and ANT+ technology capability.The monitor easily connects to any device via Bluetooth or ANT+ and with 5kHz technology that allows you to connect to multiple devices at the same time. The H9 can be connected and paired with smart and sport watches, gym equipment, cycle computers, and more.Perfectly designed to capture your heart rate in the most accurate way possible – the H9 monitor is built to stay in position, directly over your heart, with a completely adjustable strap. The monitor and strap are sweat resistant, and the strap can easily be washed.In the BoxPolar H9 heart rate sensorPolar Soft StrapPolar H9 getting started guideInformation noteSpecificationsCompatibility: iOS mobile devices with iOS 12 or later (iPhone 5S and later), Android mobile devices with Bluetooth capability and Android 6.0 or laterBattery Type: CR2025Battery Life: 400 hours with Bluetooth Low Energy, ANT+ and 5 kHz transmission activeConnector Size: 34mm x 65mm x 10mmWeight: 21g (connector), 39g (strap)Connector Materials: ABS, ABS + GF, PC, Stainless steelStrap: 38% Polyamide, 29% Polyurethane, 20% Elastane, 13% PolyesterWater Resistant: 30m (suitable for swimming)Operating Temperature: -10 °C to +50 °C / 14 °F to 122 °FSizingXS-S: 51-66cmM-XXL: 65-93cmFeaturesCompatible with top fitness apps, sports and smart watches, gym equipment and many other Bluetooth and ANT+ devicesCan be connected to Bluetooth and ANT+ devices simultaneouslyUp to 400 hours of battery lifeThe chest strap places the heart rate sensor is placed close to the heartReliable and high-quality heart rate measurementsProvides accurate calorie burn dataBuy Polar Heart Rate Monitors from Chain Reaction Cycles, the World's Largest Online Bike Store.
Polar H9 Heart Rate SensorThe Polar H9 Heart Rate Sensor is a reliable monitor that provides high-quality heart rate date with Bluetooth and ANT+ technology capability.The monitor easily connects to any device via Bluetooth or ANT+ and with 5kHz technology that allows you to connect to multiple devices at the same time. The H9 can be connected and paired with smart and sport watches, gym equipment, cycle computers, and more.Perfectly designed to capture your heart rate in the most accurate way possible – the H9 monitor is built to stay in position, directly over your heart, with a completely adjustable strap. The monitor and strap are sweat resistant, and the strap can easily be washed.In the BoxPolar H9 heart rate sensorPolar Soft StrapPolar H9 getting started guideInformation noteSpecificationsCompatibility: iOS mobile devices with iOS 12 or later (iPhone 5S and later), Android mobile devices with Bluetooth capability and Android 6.0 or laterBattery Type: CR2025Battery Life: 400 hours with Bluetooth Low Energy, ANT+ and 5 kHz transmission activeConnector Size: 34mm x 65mm x 10mmWeight: 21g (connector), 39g (strap)Connector Materials: ABS, ABS + GF, PC, Stainless steelStrap: 38% Polyamide, 29% Polyurethane, 20% Elastane, 13% PolyesterWater Resistant: 30m (suitable for swimming)Operating Temperature: -10 °C to +50 °C / 14 °F to 122 °FSizingXS-S: 51-66cmM-XXL: 65-93cmFeaturesCompatible with top fitness apps, sports and smart watches, gym equipment and many other Bluetooth and ANT+ devicesCan be connected to Bluetooth and ANT+ devices simultaneouslyUp to 400 hours of battery lifeThe chest strap places the heart rate sensor is placed close to the heartReliable and high-quality heart rate measurementsProvides accurate calorie burn dataBuy Polar Heart Rate Monitors from Chain Reaction Cycles, the World's Largest Online Bike Store.
Polar Vantage V2 GPS Watch with Heart RateThe Polar Vantage V2 GPS Watch with Heart Rate is a bundle which includes Polar’s advance multisport Vantage V2 smartwatch and Polar’s high-performance H10 chest-based heart rate monitor.In the BoxPolar Vantage V2 premium multisport watchCharging cablePolar H10 Heart Rate SensorPolar Vantage V2 user manualInformation notePolar H10Included with the watch is the Polar H10 which is the most accurate heart rate sensor in Polar’s range. Boosting accuracy, performance and comfort to form a chest-based heart rate monitor that you can rely on whatever the environment and whatever the activity.Advanced Wrist-Based Heart RatePolar’s Precision Prime™ sensor fusion technology is fully integrated into the wrist of the Vantage V2 to deliver incredibly accurate heart rate monitoring.Ultra-Long Battery LifeBuilt for your longest adventures and endurance races the smart watch comes with an extensive battery life that can last up to 7 days with multiple battery saving modes.Integrated GPSThe Vantage V2 comes fully integrated with GPS, GLONASS, Galileo and QZSS with GPS for fast fix times. The watch also features a compass and barometric altitude.Colour Touch DisplayEasy to use and easy to read in any conditions the watch comes with a 1,2’’ always-on sunlight-readable colour touch display. The watch face is also extremely durable with a Laminated Gorilla glass lens with anti-fingerprint coating.Running Performance TestKeep track of your progress with the Running Performance Test which allows you to personalise your heart rate, speed and power zones.Cycling PerformanceThe Cycling Performance Test allows you to test your limits by personalising your power zones and shows your personal threshold power (a power meter is required – sold separately).Training Load Pro™The Training Load Pro feature helps you see how your training is affecting different parts of your body.Recovery Pro™The Recovery Pro lets you know when your body is ready to train again. It delivers recovery feedback right to your watch display. (Polar heart rate sensor is required).Leg Recovery TestThe Leg Recovery Test lets you know when your legs are ready for high intensity training. It does this in just a couple of seconds without the need of any additional specialist equipment.Nightly Recharge™This feature shows how well you have recovered from the demands of the day, during the night.Rout Planning with KomootProviding turn-by-turn guidance, you can use the watch to import planned routes from Komoot.Music Controls and other Smartwatch FeaturesStreamline all your devices using the Vantage V2. The watch allows you to easily navigate around your playlist and adjust volume straight from the watch face. Additionally, you can get a weather forecast and push notifications straight to the watch screen.Running PowerProvides comprehensive insight into your running sessions.Sleep Plus Stages™Sleep is an incredibly important part of your training and wellbeing. The Sleep Plus Stages allows you to track your sleep stages and provides insight into your sleep quality allowing you to make small changes to provide the best recharge possible.FuelWise™ Smart Fuelling AssistantThe FuelWise feature helps you learn to refuel and maintain optimised energy levels during endurance sessions.Hill Splitter™Provides detailed data about your performance on the uphill and downhill sections of your session.FitSpark™ Training GuideFor when you want to workout fast, the FitSpark Training Guide provides ready-made daily workouts that match your recovery, fitness level and training history.Strava Live SegmentsConnect your Strava Live Segments account to the Vantage V2 which allows you to receive alerts about nearby segments, see real-time performance data during a segment and to check your results right after finish.Free Running ProgrammesDelivers a personal and adaptive training plan that fits you and your goals.Sport ProfilesThe smartwatch supports over 130 different sports. You can add your favourite sports to the watch via the Polar Flow app and customise what you see during each sport.Energy SourcesThe Energy Source feature allows you to see how your body uses different energy sources during a training session. The Polar Vantage V2 divides your energy usage into carbs, proteins and fats.Swimming MetricsThe watch can be used by swimmers with a waterproof design. When swimming the Vantage V2 automatically detects your heart rate, swimming style, distance, pace, strokes and rest times. Distance and strokes also get tracked when open water swimming.Serene™ Breathing ExerciseTake time out during stressful periods of your day with the Serene breathing exercise programme which helps to relax your body and calms your mind with the help of guided breathing exercises.Running IndexThe Running Index feature provides an estimate of your running VO2max and allows you to see how your running performance is developing.Vantage V2 SpecificationsDimensions: 47mm x 47mm x 13mmWeight: 52g (with wristband), 34g (without wristband)Materials: Aerospace aluminium alloy with fibre reinforced polymerDisplay: Always-on colour touch displayDisplay Size: 1.2’’Display Resolution: 240 x 240Lens Material: Laminated Gorilla glass lens with anti-fingerprint coatingBattery Type: 346 mAh Li-polymer batteryBattery Life: Up to 40 hours (training mode – GPS and wrist-based hear rate), up to 7 days (watch mode with continuous heart rate tracking), multiple power saving options availableGPS: Integrated GPS, GLONASS, Galileo, QZSSConnectivity: Bluetooth Low Energy and Custom USB cable for charging and data synchronisationWatch: Time and date. Alarm with snoozeConnectivity: Compatible with all standard BLE heart rate sensors and running cadence and power sensors as well as cycling speed, cadence and power sensorsWristband Type: Durable and comfortable integrated proprietary silicone wristbands. Easy to changeWristband Sizing: 120-190mm (Small), 145-215mm (Medium/Large)Durability: Tested against military standards (MIL-STD-810G)Operating Temperature: from -10° to 50°CWater Resistant: Water resistant 100m (suitable for swimming)H10 SpecificationsCompatibility: Ios mobile devices, iPhone 5 later, with iOS 11 or later; Android mobile devices with Bluetooth 4.0 capability and Android 5.0 or laterUpdated: Via mobile phone using Polar Beat app or Polar Flow appMemory: One training sessionBattery Life: 400 hours with Bluetooth Low Energy and 5kHz transmission activeBattery Type: CR 2025Connector Size: 34mm x 65mm x 10mmWeight: 21g (connector), 39g (strap)Materials (Connector): ABS, ABS and GF, Stainless steelMaterials (Strap): 38% Polyamide, 29% Polyurethane, 20% Elastane, 13% Polyester, Silicone printsWater Resistance: 30m (suitable for swimming)Operating Temperature: -10 °C to +50 °C / 14 °F to 122 °FConnectivity: ANT+, Bluetooth Low Energy, 5 kHzFeaturesTracks heart rate with Precision Prime™ sensor fusion technologyUp to 40 hours of continuous battery life with multiple power save options which boost battery life up to 100 hoursIntegrated GPS, GLONASS, Galileo and QZSS with assisted GPS for fast fix timesComes with compass and barometric altitude1,2'' always-on sunlight-readable colour touch display with Laminated Gorilla glass lens and anti-fingerprint coatingSupports over 130 different sports through the Polar Flow app which allows you to customise what you see on your watch during each sportIntegrated Strava Live Segments provides alerts about nearby segments and allows you to see real-time performance data during a segmentEasily navigate around your music playlists and adjust volume straight from the watch faceBuy Polar Run GPS from Chain Reaction Cycles, the World's Largest Online Bike Store.
Prime Primavera 1-1/8"-1.5" Integrated HeadsetDesigned to provide you with the ultimate in steering performance, this headset features Ti Coated Races and Grade 10 Stainless Steel balls. Often overlooked and neglected, the headset is an essential component of your bike. Upgrade your ride with the Primavera Carbon Headset.The titanium nitrite coated races in the Primavera 1-1/8"-1.5" Integrated Headset roll smoothly and won't rust, while the angular contact bearings provide stability and allow for adjustability.We wanted the headset to run smoothly and last for many miles in all conditions, so the bearings are sealed tight against the elements.The looks match the performance thanks to a Prime branded carbon top cap and cover. We didn't hold back on the crown race either - it is CNC'd from 7075 alloy, which provides an improved contact point for the headset.And, if you want to slam your stem like the pros, select our short option, which features a 2.4mm top cover.Features: Steerer Type: Tapered 1-1/8" to 1.5" Top Cap Material: Carbon Top Cover Material: Carbon Bearing Material: Titanium Race with Steel Bearing Use: Road Upper Bearing: IS41.8/28.6, 6.5mm H x 41.8mm OD x 45x45deg Lower Bearing: IS52/39.8, 7mm H x 51.8mm OD x 45x45deg Stack Height: 8.9mm (Medium option) / 2.9 mm (short option) (without Crown Race) Top Cover Height: 8.2mm (Medium option) / 2.4mm (short option) Weight: TBCBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Prime Primavera 1-1/8"-1.5" Integrated HeadsetDesigned to provide you with the ultimate in steering performance, this headset features Ti Coated Races and Grade 10 Stainless Steel balls. Often overlooked and neglected, the headset is an essential component of your bike. Upgrade your ride with the Primavera Carbon Headset.The titanium nitrite coated races in the Primavera 1-1/8"-1.5" Integrated Headset roll smoothly and won't rust, while the angular contact bearings provide stability and allow for adjustability.We wanted the headset to run smoothly and last for many miles in all conditions, so the bearings are sealed tight against the elements.The looks match the performance thanks to a Prime branded carbon top cap and cover. We didn't hold back on the crown race either - it is CNC'd from 7075 alloy, which provides an improved contact point for the headset.And, if you want to slam your stem like the pros, select our short option, which features a 2.4mm top cover.Features: Steerer Type: Tapered 1-1/8" to 1.5" Top Cap Material: Carbon Top Cover Material: Carbon Bearing Material: Titanium Race with Steel Bearing Use: Road Upper Bearing: IS41.8/28.6, 6.5mm H x 41.8mm OD x 45x45deg Lower Bearing: IS52/39.8, 7mm H x 51.8mm OD x 45x45deg Stack Height: 8.9mm (Medium option) / 2.9 mm (short option) (without Crown Race) Top Cover Height: 8.2mm (Medium option) / 2.4mm (short option) Weight: TBCBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.
Prime Doyenne 1-1/8"-1.5" Integrated HeadsetPrime's mission is to make your ride better, which is why the Doyenne Integrated Headset ensures smooth steering for many miles in all conditions, thanks to its superior reliability, quality and performance.The Doyenne Headset features highly polished angular contact bearings to ensure smoothness, and the top cap is CNC machined from 6061 alloy and sealed to keep moisture away from the bearings.To protect the lower bearings, Prime has included a CNC-machined 7075 alloy crown race.Features: Steerer Type: Tapered 1-1/8" to 1.5" Top Cap Material: Aluminium Top Cover Material: Aluminium Bearing Material: Steel Race with Steel Bearing Use: Road Upper Bearing: IS41.8/28.6, 8mm H x 41.8mm OD x 45x45deg Lower Bearing: IS52/39.8, 7mm H x 51.8mm OD x 45x45deg Stack Height: 8.7mm (without Crown Race) Top Cover Height: 8.2mm Weight: TBCBuy Prime Components from Chain Reaction Cycles, the World's Largest Online Bike Store.