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The GT Mach One Junior is the ideal starting point for a junior rider to begin their journey into the world of BMX riding. The Mach One 20 is fast, agile, reliable and stylish. Plus, it rolls upon 20" wheels and has a strong and lightweight 6061 alloy frame at its core with superb components to quickly get you up to speed.
Strong and Lightweight Aluminum Frame Construction
This superb beginner BMX racer features a GT Mach One Race aluminum frame that's designed with modern geometry to complement speed, control and comfort. Also, it's equipped with quality alloy-forged 3-piece cranks, GT Race handlebars and Kenda Race tires to give new riders a head start.
Perfect for Aspiring BMX Racers
This bike is perfect for the mid-sized rider and its quality build and construction inspires confidence for riders in the early stages of racing.
Please note: this bike is for use on BMX tracks and skate parks. In many countries, it is illegal to use this bike on public roads without using the two independent braking systems provided (a front and rear brake).Note: Manufacturer may reserve the right to change the specification of that listed or shown on this page.
The size chart below will get you on the right size bike. Experienced riders may also wish to refer to the geometry chart for more detail.
Getting the Right Fit
At Wiggle we measure each of our bikes to build accurate size charts for our customers. Our qualified team of mechanics then individually check each order, against measurements supplied by you, to ensure the size chosen is correct. Another reason you can have complete confidence when buying a bike from Wiggle!
If you are on the change over between sizes both options will fit. Racers and experienced riders would usually select a smaller size as this offers quicker handing. A larger bike offers more stability and is more suited to new and intermediate riders.
|Seat Tube Length||inches||91⁄5″|
|Top Tube (Virtual)||inches||181⁄2″|
|Head Tube Angle||Degrees||73°|
|Seat Tube Angle||Degrees||70°|
|Bottom Bracket Drop||inches||1″|
|Bottom Bracket Height||inches||111⁄3″|
We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.
Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.