2004 GT Pro Series Micro
Part Diary, Part Technical Manual, Part Tips & Tricks

This is a funny one. We're in the process of adopting a little girl from China, which won't happen for another 5-6 months. In the meantime, I saw a cool little mini BMX bike at my LBS with a $200 price tag. As a kid, I've always liked these mini BMX bikes, with those thin 1-1/8" tires and tiny handlebars and seats. So I figured that we would want to buy our daughter a bicycle sooner or later, and this was about as small of a "cool" bike as they come, so I offered $150 and took it home on February 2, 2008.

The bike was in good condition, but pretty dirty, so the next morning, I disassembled the bike, cleaned everything up, repacked the bottom bracket, adjusted the brakes, and put on a pair of training wheels. Here are the specs:

Frame: 2004 GT Pro Series Micro, 4130 CrMo, 18cm CTC. Serial Number: SIFH04184.
Fork: GT 4130 CrMo, 1" threadless, black
Front Wheel: GT hub with radial laced spokes to Alex AL-DR13 Double Wall, 6061H-T6 aluminim, 451x13mm. 95mm spacing.
Rear Wheel: GT hub with Alex AL-DR13 Double Wall, 6061H-T6 aluminim, 451x13mm. 110 spacing.
Training Wheels : Wald, for 16", 18", and 20" frames.
Tires: GT Directional Knobbies, 451 x 28C (or 20" x 1-1/8").
Freewheel: Generic 17T for 1/8" chain.
Cranks: GT 3-piece cranks by Dotek with 40T chainring, 155mm, 110 BCD.
Bottom Bracket: Tange with VP spindle, 112.5mm, square taper.
Headset: Tange 1" threadless.
Chain: KMC 1/8".
Stem: GT 1" threadless, 40mm.
Handlebar: Generic Mini, 19.5mm diameter, black.
Grips: Ame Mini
Rear Brake: Tektro Mini-V, red.
Lever: Dia-Compe, forged, black.
Pedal: VP Platforms, black cages with red body.
Saddle: GT Mini with integrated 7/8" aluminum seatpost.

The bike currently weights 15lbs 15oz as shown, 19lbs 7oz with training wheels.