GT Bicycles Stomper Ace 24" Kids Bike - 2023

  • All Terra suspension fork with 50mm travel
  • Powerful Promax mechanical disc brakes
  • Shimano Altus 8 speed gears
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The Stomper Ace from GT is ready to hit the trails with some great features usually found on adult mountain bikes. With front suspension, disc brakes and Shimano gears this bike has everything kids could ask for and more.

  • Improved geometry - GT bikes with the LegitFit system feature geometry adjustments to improve ergonomics for youth statures. The result: Increased stability, comfort and confidence for a wider range of riders.
  • Easier pedalling - GT bikes with the LegitFit system have their pedal positions moved slightly forward. The result: Makes it easier to pedal.
  • All Terra suspension fork with 50mm travel
  • Promax mechanical disc, 160/160mm rotors
  • Shimano Altus 8 speed drivetrain

GT has developed a new line of kids’ bikes that utilise its Legit Fit system and are designed specifically for those growing shredders. The Legit Fit system enables GT to build kids’ bikes that have narrower cranks, proper gearing and improved body positioning. All with the benefits of optimising pedalling, balance, and speed right from the start. Even better is that it’s a system that works for kids of all ages, no more needing to “grow into” a bike.

Size Chart

BrandGT Bicycles
MPNG54201U10OS, G54201U20OS, G54201U30OS
Frame 24" GT LegitFit Design, alloy w/ replaceable hanger
ForkAll Terra, 50mm Travel, 1-1/8" threadless steerer
Rear ShockN/A
RimsDouble wall, w/ machined sidewall, 28h
SpokesStainless Steel, 14g
PedalsGT Flat Pedal, resin
CrankProwheel, Pro-V30, 110mm length, 30T
Bottom BracketCartridge, square taper
ChainKMC Z51, 8-speed
Rear CogsSunrace, 11-34T, 8-speed
Front DerailleurN/A
Rear DerailleurShimano Altus
ShiftersShimano Altus, 8-speed
HandlebarAlloy Riser bar, 30mm rise, 600mm width
StemAlloy Ahead, 30mm
Headset1 1/8" Ahead
BrakesPromax mechanical disc, 160/160mm rotors
Brake LeversPromax
E-Bike DisplayN/A
E-Bike BatteryN/A
E-Bike ChargerN/A
E-Bike Drive UnitN/A
SaddleGT MTB
SeatpostAlloy Micro Adjust
Sizes AvailableOne Size
Fork Travel(F) 50mm
Frame Travel Customer Reviews

Customer Reviews

Superb. My grandson will love it.

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Our Payment Options

Maestro Mastercard Visa PayPal V12 Retail Finance

Online we currently accept payment from the methods listed above including a wide range of finance options. In store we also accept payment in the form of cash and gift vouchers.

Finance Options

In order to get the kit you want, when you need it, without ruining the family finances we offer a highly flexible range of finance options to help you get the best products on your bike now rather than at the end of the season when you've saved up the cash to make the purchase. There are even interest free options which effectively spread the cost without costing you any extra.

D.T.(Automotives) Limited T/A Tweeks Cycles is authorised and regulated by the Financial Conduct Authority and is the broker and not the lender. Our FCA registration number is 689896. D.T.(Automotives) Limited offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance and Klarna. Credit is provided subject to affordability, age and status. Minimum spend applies. Not all products offered by Secure Trust Bank PLC are regulated by the Financial Conduct Authority.

Delivery & Returns

UK Mainland Delivery Prices

Delivery Type Cost Estimated Delivery Time
Standard Delivery for orders under £49.99 from £1.33 2-3 working days from day of despatch(Excludes weekends and Bank Holidays)
Standard Delivery for orders over £49.99 Free
Express Delivery from £1.68 1-2 working days from day of despatch(Excludes weekends and Bank Holidays)
Special Delivery from £12.54 For any next working day delivery order before 4pm Monday to Thursday.
For any weekend delivery order before 4pm Friday
Click & Collect from £7.62 Collect your parcel from a local post office. 2-3 working days from day of despatch(Excludes weekends and Bank Holidays)

For international shipping please visit our delivery page.

For information about returning an item please visit our returns page.