Mach One Expert

Entry to BMX Racing shouldn’t cost an arm and a leg. The Mach One Expert is made to fit riders 4'8"-5'4".

  • Influence by Speed alloy frame with reverse dropouts
  • GT Top Load Stem
  • GT Alloy Forged 3pc, Square Taper, 130 BCD Spider
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Color

Shipping Policy

Free shipping on all orders for bikes, apparel, parts & accessories for any order over $25 in the United States. 

*Please allow for 7-11 days of transit time as all orders are shipped via ground shipping.

*If an order is placed on Friday, please allow an extra 3-4 days for processing. 

Please reach out to sales@gtbicycles.com if you have any questions.

Return Policy

We accept returns and exchanges on items purchased from GTBicycles.com for (30) thirty days from the date of purchase in accordance with our return policy below.

Details

  • The bike or part must be in its original packaging to receive a 100% refund.
  •  If product is unused but protective packaging has been removed or has major damage, we will refund 75% of the order.
  • We do not accept returns on apparel.
  • Please allow for 7-10 days to process the return and issue refund.

*Protective packaging includes: foam, cardboard, zip ties, plastic axle covers, warning decals and reflectors.

Price Matching Policy

At GT Bicycles, we offer competitive pricing every day. All sales are final, and we do not provide price matching, adjustments, or store credits. Our focus is on delivering great value through quality products and exceptional service.

Please reach out to sales@gtbicycles.com to start a return.

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Mach One Expert

The Mach One Expert is made to fit riders 4'8"-5'4"

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

Frame

frame GT Mach One Race MK2, 6061 Alloy, Euro BB, Reverse Dropouts, V-Brakes, 1-1/8" Integrated H/T
sizes available EXPERT
fork GT BMX Race, Hi-Ten Steel 1 1/8" Steerer, 312mm A/C, 3/8" Dropouts
wheel size 20

Wheels

rims Alloy Double Wall, 28h
front hub Steel Body, 28h, 3/8" Axle
rear hub Steel Flip Flop Thread-on Body, Freewheel, 28h, 3/8" Axle
front tire Kenda Race, 20 x 1-3/8"
rear tire Kenda Race, 20 x 1-3/8"
spokes Stainless Steel, 14g

Drivetrain

rear cogs 16T Freewheel
chain KMC S1
crank GT Alloy Forged 3pc, 165mm, Square Taper, 130 BCD 42T Steel Chainring
bottom bracket Threaded Square Type
pedals GT Mini Size Platform, PP Material

Cockpit

handlebar GT Race, Steel, 6.5"H x 26"W, 8° Back, 4° Up, 19mm O.D. Cross Bar
stem GT Top Load, 40mm
grips GT Statement
headset 1-1/8" Sealed Integrated (41.8 x 45)
seatpost Combo Alloy 22.2 Integrated
saddle GT Uni Mini Padded

Brakes

brakes Alloy V-type
brake levers Alloy V-type
Please note that, based on component availability and other factors, specifications are subject to change without notice.

Fit Guide

Micro
2'0" - 4'0"
Mini
4'0" - 4'4"
Junior
4'3" - 4'7"
Expert
4'6" - 5'5"
Expert XL
5'2" - 5'6"
Pro
5'4" - 5'8"
Pro XL
5'7" - 6'0"
Pro XXL
6'0" - 6'5"
Pro XXXL
6'0" - 6'5"
Pro XL 24"
5'6" - 6'5"

Geometry

Sizes (in) Expert
Top tube actual 18.75
Head tube angle 73 °
Seat tube angle 72 °
Standover 7
Head tube length 4.33
Wheelbase 34.86
Front center 21.82
Chainstay length 13.39
Bottom bracket height 11.5
Seat post diameter 0.875
Axel to crown 12.2
Dropouts 10mm
Head tube type Integrated
Brake mounts V-Brake
Rider area 21.46
Bottom bracket type Threaded
Fork rake 1.3
Axel to crown 12.2

Is touchup paint available?

Unfortunately, touchup paint is not available at this time as our paint codes are unique to our painter.

GT Tech Book

EN

GT Owner's Manual

EN FR DE IT DU

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