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GT Mach 1 Racing BMX Mini Junior Expert

GeoFree Delivery Over £50 with Same Day Dispatch
The GT Mach One has been designed to be the ideal introduction into the world of BMX racing and with a  T-6 alloy frame that was inspired by the GT Speed Series frame coming with features like: Reverse Dropouts, GT Top Load Stem, High Quality V-brakes in addition to Premium racing tyres.  Available in 3 Sizes (Mini, JR and Expert).


The first thing you will need to do is make sure you get the correct size BMX race bike first based on your height. BMX race bikes are sized from Mini (The smallest) through to Pro (adult) sizes. These sizes refer to the overall size of the frames and parts but the wheel diameter will remain the same at 20” despite the width of the tyres varying.

Rider Height (ft & in) Rider Height (cm) Wheel Width (in) Bike Size
2’0″ – 4’0″ Up to 130cm 1 – 1/8 Micro Mini
4’3″ – 4’7″ 138cm – 155cm 1 – 1/8 Junior
4’6″ – 5’5″ 150cm – 165cm 1 – 3/8 Expert



  • BMX Race inspired beginner bike with smaller wheels for the little ones who are just learning to ride
  • A great BMX race inspired kids to adult BMX bike
  • Lightweight aluminium construction
  • Durable double wall rims
  • Strong responsive V-brake

Track ready entry level race bike

Allows riders to test the waters of racing without breaking the bank

Upgradeable Aluminum Race Frame

Influenced by the Speed Series frame allows riders to take the bike spec from amateur to pro