GT 2021 Mach One Expert Bike (Blue) (19.5" TopTube)
G41601U10MD
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The GT Mach One BMX bike is complete and ready to race right out of the box. One race is all it takes to plant the seed of wanting a podium finish. Whether you're new to the sport or looking to up your game to the next level, the 2021 Race bikes from GT are a perfect fit. Strong stiff and light, they are built ready to train and secure that win
Specifications:
Frame: 6061-T6 Aluminum, Euro Bottom Bracket, Reverse Dropouts
Fork: GT BMX Race, Hi-Ten Steel 1-1/8 steerer, 3/8" dropouts
Headset: 1-1/8" integrated 45 x 45 degree sealed bearings
Stem: GT Top Load 1" 40mm
Bars: GT Race, Steel, 6.5" High x 26" Wide, 8° Back, 4° Up, 19mm O.D. Cross Bar
Grips: GT Statement
Crancks: GT Alloy forged 3 Piece 165mm, square taper
Bottom Bracket: Threaded square type
Pedals: GT Mini size platform, PP material
Chain: KMC S1
Chainring: BCD100, 38T Steel Chainring, 5-bolt
Front Hub: Steel body (28H). 3/8" axle
Rear Hub: Steel flip flop thread-on body, freewheel, (28H), 3/8" axle
Rims: 28H Alloy double Wall
Spokes: Stainless Spokes, 14g
Cog Set: 16T freewheel
Tires: Kenda Race, 20 x 1-3/8"
Seat: GT Uni Mini Padded
Seat Post: Alloy 22.2 Integrated
Seat Clamp: TBA
Lever: Alloy V-type
Brakes: Alloy V-type
Extras: N/A
Weight: TBA
Frame Geometry:
Toptube: 19.5"
Headtube Angle: 73°
Seattube Angle: 70°
BB Height: 11.5"
Chainstays: 13.62"
Sizing Guideline: 4'8"-5'4"
Need help building your complete bike? Check out our bike build video below.
NOTE: To ensure that every component on your bicycle is working properly, Dans Comp recommends that all bikes be assembled by a qualified mechanic. Improper assembly of your bicycle may lead to premature wear or failure of individual components such as headsets, crank assembly and wheels. Failure to do so may void the manufacturer warranty.
This product was added to our catalog on September 21, 2020
BeckBMX
Verified Owner
Monday, Oct 5 2020 (about 2 years ago)
GT 2021 Mach One Expert Bike (Blue) (19.5" TopTube)
I just got this for my 9 year old. She is 4'5" and she rode this out of the box like a champ during her first practice at a real track. It's light as well. The paint job is awesome. Though I can see it getting dinged up in the rigors of transporting and racing. For a novice this bike is good.
Update 1: My daughter already busted the left pedal and crank arm. I can't get replacement parts from GT, so I'm ordering a new crankset and re-gearing it to my daughter. The crankset and arms are the weak part of this bike. The crankset components don't seem to be any better than what come on a bike from the big box stores. In the meantime I found a mismatched left crank arm to fit so she can keep riding.
Update 2: The crankset has to be completely replaced after two months. The temp fix of a mismatched arm worked briefly. If you buy this bike go ahead and order a new BB and crankset with it. Left arm came off easy. Right arm threads stripped as soon as the puller started to work. I had to get a ball joint fork and bust it off. I ordered from the mega-zon store site and got a cheapo hollow axle/external bearing/aluminum arm combo and it is working out well this race season.
Update 1: My daughter already busted the left pedal and crank arm. I can't get replacement parts from GT, so I'm ordering a new crankset and re-gearing it to my daughter. The crankset and arms are the weak part of this bike. The crankset components don't seem to be any better than what come on a bike from the big box stores. In the meantime I found a mismatched left crank arm to fit so she can keep riding.
Update 2: The crankset has to be completely replaced after two months. The temp fix of a mismatched arm worked briefly. If you buy this bike go ahead and order a new BB and crankset with it. Left arm came off easy. Right arm threads stripped as soon as the puller started to work. I had to get a ball joint fork and bust it off. I ordered from the mega-zon store site and got a cheapo hollow axle/external bearing/aluminum arm combo and it is working out well this race season.