Mach One Pro

Entry to BMX Racing shouldn’t cost an arm and a leg. The Mach One Pro is ideal for a beginner 5'6"-5'10".
  • Influence by Speed alloy frame with reverse dropouts
  • GT Top Load Stem
  • GT Power Series Cr-Mo 3pc. Cranks, 110 BCD Spider
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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

Mach One Pro

The Mach One Pro is ideal for beginners 5'6"-5'10" of all ages


frame GT Mach One Race MK2, 6061 Alloy, Euro BB, Reverse Dropouts, V-Brakes, 1-1/8" Integrated H/T
sizes available PRO
fork GT BMX Race, Hi-Ten Steel 1 1/8" Steerer, Tapered Legs, 305mm A/C, 3/8" Dropouts
wheel size 20


rims Alloy Single Wall, 36h
front hub Steel Body, 36H, 3/8" Axle
rear hub Steel Flip Flop Thread-on Body, Freewheel, 36h, 3/8" Axle
front tire GT Wing 20 x 1.75"
rear tire GT Wing 20 x 1.75"
spokes Stainless Steel, 14g


rear cogs 16T Freewheel
chain KMC S1
crank GT Power Series Tubular Cr-Mo 3pc., 175mm Arms, 19mm x 8T Splined Spindle, 110 BCD Steel Spider, GT 44T Steel Chainring
bottom bracket Euro Sealed Bearing
pedals GT Low Profile FS Platform Design


handlebar GT Race, Steel, 8.25"H x 29"W, 3° Up, 11° Back
stem GT Top Load, 50mm
grips GT Statement
headset 1-1/8" Sealed Integrated (41.8 x 45)
seatpost Alloy, 27.2mm x 200mm
saddle Railed


brakes Alloy V-type
brake levers Alloy V-type


Sizes (in) LG
Top tube actual 20.75
Head tube angle 74° °
Seat tube angle 72° °
Standover 7
Head tube length 4.33
Wheelbase 37.46
Front center 23.22
Chainstay length 14.37
Bottom bracket height 11.3
Seat post diameter 1
Axel to crown 12.42
Dropouts 10mm
Head tube type Integrated
Brake mounts V-Brake
Rider area 22.39
Bottom bracket type Threaded
Fork rake 1.38
Axel to crown 12.42

Fit Guide

2'0" - 4'0"
4'0" - 4'4"
4'3" - 4'7"
4'6" - 5'5"
Expert XL
5'2" - 5'6"
5'4" - 5'8"
Pro XL
5'7" - 6'0"
6'0" - 6'5"
6'0" - 6'5"
Pro XL 24"
5'6" - 6'5"

GT Tech Book

GT Owner's Manual