Carbon Aero Gravel Bike | On&On Race GRX827 Di2

55288308629880,55288308662648,55288308695416,55288308728184,55288308760952

£5,600

or £155.56 a month at 0% APR over 36 months. How it works

Size View geometry 1 2 3 4 5

ColourDawn Blue

Every Pearson is built to order, so each part is set to the standard fit for your size. Change anything you like at no extra cost.

Bar width Standard: 380mm

Stem length Standard: 90mm

Crank length Standard: 170mm

Seatpost setback Standard: 0mm

Stack height (spacers) We build every bike with a 30mm spacer stack as standard. Keep this unless you know your exact fit: the steerer is cut to length during the build, so height cannot be added back later.

One-Piece Bar Upgrade

Width / Stem Length

£150

Shimano XT SPD Pedals

£115

Pearson Bottle

Colour

£10

Topeak Feza Bottle Cage

£25

RideWrap Tailored Protection

Fitted to your frame before assembly; adds up to two weeks to your build

£300

Everything you need, nothing more

This off-road machine has been tuned for pure speed. A carbon layup that's been optimised for performance, paring back unnecessary extras in favour of a sublime ride across any terrain.

Material

Carbon, T1000 & M40JB

Tyre clearance

Up to 45mm

Wheels

ERE Tenaci GA40

40mm Carbon

Groupset

Shimano GRX Di2 RX827, 12-speed

Included with every build

Crash replacement

Discount to keep you riding

Expert build

Handbuilt in London

Lifetime warranty

On the frame and fork

Precision fit

£200 bike fit cashback

Ready to ride

Built, tuned and tested

Worldwide shipping

UK hand delivery

On&On Race is tuned for speed off the road. The carbon layup is optimised to strip out anything that does not earn its place, for a clean, fast ride across any surface.

Who it's for: Gravel racers and riders who want to go hard off road.

Where it goes: Start lines and fast gravel, with the direct response to turn every watt into forward drive.

Built around your fit: Every Pearson is built to order, so on every build we set the bar width, stem length, stack height and crank length to suit you. Your bike arrives set up to your own measurements and ready to ride, the same fit thinking that shapes our geometry applied to the contact points that make it feel like yours.

Fit

Where your hands and hips sit.

Handling

How it steers and settles.

On&On geometry, every size
Measurement
Rider heightcm	158 to 171	167 to 178	175 to 183	180 to 190	188 and up
Fit
	365	373	381	390	399
	542	558	579	598	617
	521	539	553	568	583
	470	495	520	545	570
	110	125	145	165	185
	74.0	73.5	73.5	73.5	73.5
Handling
	70.5	71.0	71.5	71.5	71.5
	69	69	66	66	66
	50	50	50	50	50
	1011	1020	1030	1046	1061
	435	435	435	435	435
	78.0	78.0	78.0	78.0	78.0

Frame

On&On Race, carbon high-strength T1000 & high-rigidity M40JB

Fork

On&On, carbon

Wheels

ERE Tenaci GA40

40mm Carbon

Weight: 1,549 g a pair
Front wheel: 705 g
Rear wheel: 844 g
Rim height: 40 mm
Inner width: 26 mm
Outer width: 33 mm
Rim: Carbon, hooked, tubeless ready
Spokes: Sapim CX-Delta (rear also CX-Sprint) steel straight-pull aero, 24 front / 24 rear
Hubs: ERE Iona S, 36T star ratchet, SKF bearings
Axles: 12x100 mm front / 12x142 mm rear thru-axle
Rotor mount: Center Lock

Tyres

Vittoria Terreno Pro T60 Mixed 45c Brown

Weight: 670 g each
Size: 700x45c (ETRTO 45-622)
Casing: Eco Race, organic cotton with natural latex, recycled nylon sidewall protection
Compound: Eco Race Formulation
Tread: Mixed gravel (T-score 60)
Colour: Brown

Crankset

Shimano GRX FC-RX820-1, 42 tooth

Size 1-4: 170mm, Size 5: 172.5mm

Weight: 656 g (without bottom bracket)
Chainring: 42T, 110 BCD 4-arm
Spindle: Hollowtech II (24 mm)
Chainline: 49.7 mm

Cassette

Shimano XT CS-M8200 12-speed, 10-51T

Weight: 463 g
Speeds: 12
Range: 10-51T
Freehub: Shimano Micro Spline

Rear Derailleur

Shimano GRX Di2 RD-RX827 SGS, 12-speed

Weight: 449 g (without battery)
Speeds: 12
Max cog: 51T
Capacity: 41T
Cage: SGS (long)

Chain

Shimano CN-M8100

Weight: 252 g (114 links)
Speeds: 12 (HG 12-speed)
Connector: QUICK-LINK

Brakes

Shimano GRX BR-RX820

Weight: 282 g (pair of callipers)
Brake: Hydraulic disc
Mount: Flat mount
Pistons: 2

Rotors

Shimano RT-CL800 160mm

Weight: 114 g each
Mount: Center Lock
Diameter: 160 mm
Thickness: 1.75 mm
Cooling: ICE TECHNOLOGIES FREEZA fins

Handlebar

Pearson Flared Carbon 2 piece

Size 1: 38cm, Size 2-4: 40cm, Size 5: 42cm

Stem

Pearson Road Carbon Stem

Size 1: 90mm, Size 2-4: 100mm, Size 5: 110mm

Bar Tape

Fizik Terra Bondcush Tacky

Weight: 69 g
Thickness: 3 mm

Saddle

Fizik Vento Argo X1 140mm

Weight: 192 g
Width: 140 mm
Rails: Carbon, 7 x 9 mm

Seatpost Offset

Size 1-2: 0mm, Size 3-5: 12mm

Bottom Bracket

CeramicSpeed T47e

Weight: 114 g (SRAM DUB), 118 g (Shimano 24 mm)
Spindle: SRAM DUB or Shimano 24 mm, to match the crankset
Bearings: CeramicSpeed balls on hardened-steel races (Standard, uncoated)
Cups: 2 threaded cups, bearings pressed in

Headset

CeramicSpeed SLT bearings

Bearings: CeramicSpeed SLT, 31 g each
Size: 1-1/2 in
Dimensions: 40 x 52 x 7 mm (ID x OD x width)

In the wild

Riders on Pearson On&On Race gravel bikes on a woodland track at racing speed

Spectra rider racing the On&On Race at the National Trophy

A rider at speed on a Pearson On&On Race in Dawn Blue

Reviews

For such a stiff bike the On & On Race doesn't feel harsh at all; Pearson has done a good job of speccing a frame that has a small amount of flex, a bit of compliance where it's needed to take the edge off.
Stu Kerton, road.cc | Dec 2025

Who is the On&On Race for?

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.

What carbon is the On&On Race frame made from?

The On&On Race frame is built from T1000 and M40JB 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.

How much does the On&On Race frameset weigh?

The On&On Race frame weighs 1000g. The fork weighs 440g. Combined frameset weight is approximately 1440g, measured at size 3.

What does a complete On&On Race bike weigh?

Weight depends on the build. Measured at size 3: SRAM RED XPLR AXS 7.88kg, SRAM Force XPLR AXS 8.07kg and Shimano GRX 827 Di2 8.46kg. ERE Tenaci GA40 carbon wheels come on every build.

What is the maximum tyre clearance on the On&On Race?

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.

Is the On&On Race tubeless-ready?

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.

What bottom bracket standard does the On&On Race use?

The On&On Race uses T47 on every build. All three builds come with a CeramicSpeed T47 bottom bracket, so there is no entry-level option on this model.

What groupset options are available on the On&On Race?

Three builds: SRAM RED XPLR AXS (1x, 13-speed, wireless), SRAM Force XPLR AXS (1x, 13-speed, wireless) and Shimano GRX 827 Di2 (1x, 12-speed, wireless shifters). The On&On Race is 1x only. A single chainring keeps the drivetrain simple, light and reliable for racing.

What wheels come on the On&On Race?

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.

What dropout standard does the On&On Race use?

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.

What mounts and carrying options does the On&On Race have?

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.

Is the On&On Race UCI approved?

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.

If I'm building an On&On Race frameset, what bottom bracket do I need?

The On&On Race uses T47, 68mm shell. For SRAM cranks, use a T47 bottom bracket made for the DUB spindle. For Shimano GRX cranks with a 24mm spindle, use a T47 68mm bottom bracket for that spindle. CeramicSpeed T47 is what we fit to every complete build and is the benchmark choice for a frameset build.

For specific BB recommendations based on your crank choice, contact us on 020 3828 7696 or email [email protected].

Can I fit a dropper post to the On&On Race?

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.

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