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Designed to build skill and confidence, the GT Stomper ACE 24 is the ultimate companion for bikers in the making.
Designed to build skill and confidence, the GT Stomper ACE 24 is the ultimate companion for bikers in the making.
GT

GT Stomper Ace 24 Inch Kids Mountain Bike in Ultra Violet

£429.00 £450.00 4% off
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

Hassle free returns

At 99 Bikes our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you aren't, we offer a 30 day online return policy* in which you can receive a full refund. Any item including bikes (with the exception of food) can be returned to us for any reason provided it is received by us in an unused and resalable condition in or with its original packaging which must be undamaged. In the event an item is returned to ourselves in an unsuitable condition, we may have to return the item or offer a partial refund. Unless the return is due to a faulty product or an incorrect delivery on our part you will have to cover the cost of the return. If you believe that we should be covering the cost of the return please contact us in advance to discuss the available options.

In line with the customer rights act 2015 if you receive an item that is faulty, of un-satisfactory quality, unusable or that differs from how the product is described you are entitled to return the item for a full refund within 30 days of purchase.

Small Items - Parts & Accessories

Include the returns form and send it to us with the delivery company of your choosing - easy peasy!

Larger Items - Bikes / Bulky Items

If you wish to return bikes or bulky items such as forks or turbo trainers please contact our Returns Department to arrange a special courier collection. Contact us on our email address websales@99bikes.co.uk We can arrange collection for you from your home or work address, using our couriers ( You may be required to cover postages costs )

* Bulky Items Include - Bikes - Wheels/wheelsets - Turbo Trainers - Framesets - Forks - Groupsets - Car racks - Child Seats

Warranty Claims

Please contact us prior to returning so we can ensure the fastest suitable resolution for you: websales@99bikes.co.uk. We also ask that you contact us before having a 3rd party undertake work on an item purchased from 99 Bikess. Any work carried out without 99 Bikes consent will not be eligible for reimbursement and may void future warranty claims for that item.

GT Stomper Ace 24 Inch Kids Mountain Bike in Ultra Violet

Season:2023

Brand:GT

Code:G54201U30OS

Packed with kid-friendly features

Designed to build skill and confidence, the GT Stomper ACE 24 is the ultimate companion for bikers in the making. The model is built around GT’s game changing LegitFit system designed to optimise balance, pedal power and control for younger riders. Immediately noticeable is the improved geometry designed to improve ergonomics for smaller statures. This improves stability, comfort and control across the board. The pedals are fitted slightly closer to the front wheel, making it easier to generate power. Positioning has also been reimagined, with GT using a narrower crank to match the smaller width of a child’s hips.

Key Features:
  • Improved geometry for young riders
  • Revolutionary LegitFit system by GT
  • Control-enhancing fast-start gearing
  • Improved pedalling mechanics
  • 24” alloy frame

A kid’s bike, reimagined

A stickler for safety, GT has fitted the Stomper ACE 24 with fast-start gearing to reduce top-speed and ensure kids stay comfortable and in control. When it’s time to drop the anchors, Promax mech disc brakes with 160/160mm rotors keep your little rippers safe and in control. The Stomper ACE 24 may be small, but it doesn’t compromise on grunt. From components to aesthetics, you can expect the same quality, durability and attention to detail full-size GT model are known for.
All UK Mainland Bike Deliveries Over £499 - Free

Bike orders are sent via TNT/FedEx with estimated delivery within 1 working day after quoted dispatch time (For Scottish Highlands, Northern Ireland, Isle of Man and the Channel Islands deliveries please allow an additional 1-4 working days).
Bike orders under £499 will incur a £20 delivery fee

Free Delivery On Orders Over £50.00

When you spend more than £50.00 at 99 Bikes deliveries to a UK mainland address will be free (excludes bikes & large items).

Certain regions and territories of the UK will incur additional charges, details of which can be found on our delivery page.

Click & Collect Orders

Please be aware Click & Collect orders may take some time to fulfil. We advise not to travel to your chosen store until you have been notified that your order is ready for collection.

Spread the cost of your new bike, helmet, safety equipment and accessories paying via instalments being taken directly from your wage. The payments for the Cycle To Work scheme are taken out of your gross wage and your Tax & NI contributions are then worked out based on your new lower gross wage which is how you save money on your new bike and equipment.

At the end of the time period specified with your Cycle To Work scheme you then have the option of buying your bike or to continuing to use it while you work for the company. If you decide to purchase the bike, the balance you owe will be based on a percentage of how much the bike was worth at the time you took out the Cycle To Work scheme.

We know how eager you'll be to jump on your new bike and hit the dirt or tarmac, so we give you everything you need to get you set up quickly. For full instructions on how you're bike will arrive and what you'll need to do, visit our How Our Bikes Are Built page

Easy Set-Up Instructions

Have your brand spanking new bike ready to ride in less than 15 minutes with our easy to follow guide.

Free Multi-Tool

9 in 1 multi-tool to help you set up and maintain your bike.

Free Pedal Spanner

Attach your pedals with ease using our free tool. Please note pedals are not included with all bikes so please check the specification. You can shop our awesome range of pedals HERE

Special Offer

30% Off Selected Pedals With All Bikes

Get 30% off a select range of pedals when you purchase a bike from 99 Bikes. Once you add the bike to cart you will be taken the pedal selection page to add your half-price pedals, discount will be applied at the checkout.

Buyers Guide
Technical Information
Frame: 24" GT LegitFit Design, Alloy w/ Replaceable Hanger

Fork: All Terra CH-565, 50mm, Coil

Rims: All Terra Double Wall, 28h

Spokes: Stainless Steel, 14g

Pedals: GT BMX Flat Pedal, Resin

Crank: Prowheel w/ Double Guard, 30T, 130mm

Bottom Bracket: Cartridge Sealed

Chain: KMC Z7, 7-speed

Rear Cogs: Sunrace CSM55, 11-34, 8-speed

Front Derailleur: n/a

Rear Derailleur: Shimano Altus, RD-M310

Shifters: Shimano SL-M310, Rapid Fire

Handlebar: Alloy Riser Bar, 30mm Rise, 580mm Width

Grips: GT MTB

Stem: Alloy Ahead, 30mm

Headset: 1 1/8" Ahead

Brakes: Promax Mech Disc, 160/160mm Rotors

Brake Levers: Alloy V-type

Saddle: GT MTB

Seatpost: Alloy Micro Adjust

Speeds: 8 Speed

Front Hub: Alloy Disc QR, 28H

Front Tire: Kenda Small Block Eight 24 x 2.10"

Rear Hub: Alloy Cassette, QR

Rear Tire: Kenda Small Block Eight 24 x 2.10"

Wheel Size: 24”
Sizing Information
GT Hardtail Mountain Bikes

SizeXSSMLXL
Height (cm)152 - 160160 - 170170 - 178178 - 188188 - 196
Height (ft/in)5' 0" - 5' 3"5' 3" - 5' 7"5' 7" - 5' 10"5' 10" - 6' 2"6' 2" - 6' 5"

GT Full Suspension Mountain Bikes

SizeSMLXL
Height (cm)158 - 168168 - 178178 - 188188 - 196
Height (ft/in)5' 2" - 5' 6"5' 6" - 5' 10"5' 10" - 6' 2"6' 2" - 6' 5"

GT Road Bikes

SizeXSSMLXLXXL
Height (cm)152 - 160160 - 170170 - 178178 - 182182 - 199190 - 200
Height (ft/in)5' 0" - 5' 3"5' 3" - 5' 7"5' 7" - 5' 10"5' 10" - 6' 0"6' 0" - 6' 3"6' 3" - 6' 7"
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