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Whyte 403 2018

Whyte 403 2018

  • Trail mountain bike for younger / shorter riders
  • Trail MTB with 13 inch frame and 26 inch wheels
  • Hydraulic disc brake MTB for youths from 8-12ish

Availability: In store only


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This product is available in the following stores:
  • Aberdeen In Stock
  • Bruntsfield In Stock
  • Leeds In Stock
  • Newcastle In Stock

Product Description


Whyte 403 2018

Genuine Whyte MTB for young riders from 8-12ish. Its 13 inch frame and 26 inch wheels also make the Whyte 403 perfect for shorter adults looking for a trail-ready mountain bike.

  • With its hydroformed alloy frame made for an SCR (single chain ring) transmission, and optimised for UK riding conditions with a progressive geometry (68˚ seat/74˚ head tube angle) to keep the rider centered and in control, the Whyte 403 boasts the key features we love about Whyte mountain bikes - see blog.
  • Its Shimano Altus transmission delivers a superb range of gears in a simplified 1x9 format via its 11-40 cassette, its single chainring (no double shifting required) and its single Shimano Altus gear mech.
  • Why one-by is the way forward see blog.
  • A chainstay-mounted chain tensioner and the narrow/wide chainring help eliminate any risk of unshipping the chain.
  • Stopping power is equally impressive, thanks to the Whyte 403's genuine Promax Solve hydraulic disc brakes. See our hydraulic disc brakes' blog.
  • Compared with a 24 inch wheel bike for younger riders, the Whyte 403's WTB 26x2.1 front / 26x1.95 inch rear tyre combo offers significantly improved traction, rollover and speed potential.
The 403 in Whyte's own words

'We've broken the mould with our kids' bikes. By putting 26” wheels on a kids' MTB we've given a boost in performance similar to an adult switching to a 650b/27.5” Trail Hardtail. More confidence, more control and easier riding.

A specific lightweight tubeset - not just sawn off versions of adult pipes - shrinks, climbs and puts a tailwind into every ride. We've downsized our maximum confidence Trail geometry and fitted air sprung forks that properly work for lighter pilots so their rides are full of thrills not spills. Shimano single ring transmissions gives simple, instinctive, sequential shifts but still have the gears for every climb and a chainset sized for shorter legs.

We've even stripped down the spoke count on the 26in wheels to 28 and fitted the same grippy front, fast rear tyre combinations as our full sized trail bikes, so they're fast and fun, and make every adventure easier.

For 2018 Whyte has specced a Shimano 9-speed trigger shifter, which will help with the transition to an adult bike.

The 403 also comes with Whyte's own Get-a-Grip seat post clamping system. This easy to use clamp allows the post to be raised or lowered on the trail, even with small cold hands.
We've downsized everything except the performance so you can start them right with a Whyte.'

Kids Bike Sizing Guide.

Bike sizing guide by brand.

See all Kids' Bikes.


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Product Questions

Product Questions

Weight is important in children's bikes. How heavy is the 403?

Technical Data

Whyte 403

6061 Hydro Formed T6 Aluminium, Multi Butted, SCR (single chain ring optimised), BBX (bottom bracket exit) internal cable routing, Chainstay Post Mount Dropouts and Get A Grip Seat Clamp System

ForkSunTour XCR, 100mm travel, 32mm, HYDRO lock-out, Air Spring, Adjustable Rebound, Post Mount
HeadsetFSA No.10, Semi Integrated
Rear HubAlloy, 4 Cartridge Sealed Bearing, 28 Hole, XD Driver
Front HubAlloy, Cup & Cone, Double Seal, 28 Hole
Spokes2.0mm, Black Stainless with Brass Nipples
RimsWTB SX-19, 28 Hole 26”
Front TyreWTB Bronson Race, 26” X 2.1"
Rear TyreWTB Riddler, 26” X 1.95"
Shift Levers

Shimano Altus SL-M310, 9 Speed Trigger Shifter

Rear Derailleur

Shimano Altus RD-M2000-SGS, 9 Speed

CassetteSunrace 9 Speed, ED Black 11-40T
ChainKMC 9 Speed
Crankset28T Narrow/Wide Chainring, 165mm Crank Length
Bottom Bracket

JIS Square Interface, BB-7420ST, Cartridge Bearings

SeatpostWhyte 20mm Offset, 30.9mm x 350mm
SaddleWhyte Custom
BarWhyte 30 degree rise DB, 31.8mm, 640mm Wide
StemWhyte Custom, 35mm
GripsWhyte Custom
Front BrakesPromax Solve, 160mm rotor
Rear Brakes

Promax Solve, 160mm Rotor, Internal Routing

Brake LeversPromax Solve Short Reach
PedalsFibre reinforced Composite Platform


Our suppliers reserve the right to change specifications and prices without notice. Edinburgh Bicycle Cooperative will do all it can to maintain prices and specifications on this web site, however we do reserve the right to change specifications and prices without notice. Similarly, despite the wonders of modern computers, it is realistic to expect the colour of any item bought to differ subtly from the image online.