Answers on our bikes, sizing, orders, delivery and warranty, from the people who build them.
Since 1860Why PearsonBritain's oldest bicycle brand, making bikes since 1860. How we design, build and look after every one.16 answersOur customer care team works from the workshop in London, alongside the people who build every Pearson. Ask them anything.
Gravel race: frame, 1x builds, wheels, mounts and sizes.
Explore the On&On Race
The On&On Race is for riders chasing pure speed off road. It is a stripped-back, performance-first gravel race bike, tuned for fast, committed riding across mixed terrain.
As a starting point, this is the size most riders of your height and inside leg ride on the On&On Race. Where you fall between two sizes, your inside leg and the way you like to ride decide it, and a professional bike fit settles it for certain: we use your fit data to choose the frame and set up the contact points before we build your bike.
| Size | Rider height | Inside leg |
|---|---|---|
| 1 | 158-171 cm 5'2-5'7 | 73-79 cm 29-31 in |
| 2 | 167-178 cm 5'6-5'10 | 77-83 cm 30-33 in |
| 3 | 175-183 cm 5'9-6'0 | 81-87 cm 32-35 in |
| 4 | 180-190 cm 5'11-6'3 | 86-92 cm 34-37 in |
| 5 | 188+ cm 6'2+ | 91+ cm 36+ in |
Not sure? Try the Fit Finder, or ask us and we'll talk it through.
The On&On Race frame is built from T1000 MJ04B Toray carbon. This is a high-performance carbon specification that delivers outstanding stiffness-to-weight performance, comparable to top-tier road race framesets. It gives the On&On Race its sharp responsiveness on hard accelerations and technical gravel sections, without sacrificing durability on rough terrain.
The On&On Race frame weighs 1000g. The fork weighs 440g. Combined frameset weight is approximately 1440g, measured at size 3.
The SRAM RED XPLR build weighs 7.88kg. The Shimano GRX 827 Di2 build weighs 8.46kg. ERE Tenaci GA40 Carbon wheels are standard across all On&On Race builds. All measurements at size 3.
The On&On Race has a maximum tyre clearance of 45mm. This accommodates a wide range of gravel and all-road tyre options while maintaining the frame's aero-optimised profile.
Yes. ERE Tenaci GA40 Carbon wheels are tubeless-compatible. Standard builds ship with inner tubes. Tubeless conversion requires a valve kit, sealant, and tubeless-rated tyres. A tubeless setup reduces the risk of pinch flats on gravel and allows you to run lower pressures for improved grip.
The On&On Race uses T47 across all builds. Both SRAM RED XPLR and Shimano GRX 827 Di2 builds come standard with Ceramic Speed Uncoated T47 bottom brackets. There is no entry-level variation; Ceramic Speed is standard across the range on this model.
Two options: SRAM RED XPLR (1x electronic, gravel-specific, wireless) and Shimano GRX 827 Di2 (1x electronic, 12-speed, wireless). The On&On Race is a 1x-only platform. There is no 2x build option. The 1x configuration keeps the drivetrain simple, light, and reliable for race conditions.
ERE Tenaci GA40 Carbon wheels are fitted as standard across all On&On Race builds, regardless of groupset tier. Unlike the On&On Adventure, there is no alloy wheel option on the Race. This ensures consistent rolling performance and weight across the range.
The On&On Race uses UDH (Universal Derailleur Hanger). UDH hangers are widely stocked by bike shops globally, making field servicing and hanger replacement straightforward. If you damage a hanger during a race or on a remote route, finding a replacement is rarely difficult.
The On&On Race is a performance-focused platform, so mounting provisions are deliberately minimal. Bottle mounts accommodate either a single aero bottle or two standard-size bottles. The flattened top tube is shaped for easy shouldering in dismount and run sections. There are no dedicated luggage mounts, fork cargo fittings, or bikepacking-specific attachments. For a gravel bike with full carrying capacity, the On&On Adventure is the right model.
Yes. The On&On Race is UCI approved and certified to ISO 4210. It is legal for use in UCI-sanctioned gravel and cyclocross events.
The On&On Race uses T47, 68mm shell. For SRAM gravel cranks (DUB standard): a T47-to-DUB adapter. For Shimano GRX cranks with 24mm spindles: a T47 68mm bottom bracket in the appropriate spindle diameter. Ceramic Speed T47 is the OEM fitment on both complete build tiers and is the benchmark choice for frameset builds.
For specific BB recommendations based on your crank choice, contact us on 020 3828 7696 or email care@pearsoncycles.com.
The On&On Race is a dedicated race platform rather than a trail or bikepacking build, so it was not designed with internal dropper post routing as a standard feature. If you are considering a dropper post integration, contact us before purchasing to confirm compatibility with your specific dropper model and seatpost diameter.
Not what you needed? Ask the team and we'll answer you directly.
Contact us
