2002 Trek Technical Manual
TR20
FRAMESET
MAIN TUBES . . . . . . . Hi Tensile steel w/CroMoly top and down tube
STAYS . . . . . . . . . . . . . Hi Tensile steel
FORK . . . . . . . . . . . . . . Trek Dirt, 1 3/8" tapered Cro-Moly blades
Axle-crown length, mm
322.0
HEADSET . . . . . . . . . . Tioga threadless
Size
25.4/34.0/30.0
Stack height, mm
25.5
CONTROLS
HANDLEBAR . . . . . . . Trek
Clamp diameter, mm
22.2
STEM . . . . . . . . . . . . . . Trek Jaws BMX, direct connect
Steerer clamp height, mm
31.7
BRAKE LEVERS . . . . . Alloy, direct pull
GRIPS . . . . . . . . . . . . . Bontrager BMX
DRIVETRAIN
CRANKSET . . . . . . . . . Trek 3-piece forged steel, 44T
Bolt hole circle, mm
1 piece
BB . . . . . . . . . . . . . . . . One-piece type
Shell x axle, mm
24 TPI,
CHAIN . . . . . . . . . . . . . KMC 410
Chain type
1/8"
Chain length (links)
88
CASSETTE . . . . . . . . . ACS Claw, 16T
WHEELSET
FRONT WHEEL . . . . . . Trek, alloy hub, 48°, 1/2" axle, Al alloy rim
E.R.D., mm
406
Rim strip
Rubber
FRONT TIRE . . . . . . . . Knobby, square style
Tire size
20 x 2.1
REAR WHEEL . . . . . . . Trek, alloy hub, 48°, 1/2" axle, Al alloy rim
E.R.D., mm
406
Rim strip
Rubber
REAR TIRE . . . . . . . . . Knobby, square style
Tire size
20 x 2.1
SPOKES . . . . . . . . . . . . 14G UCP
Front, mm
187, 3x
Rear, mm
186/186, 3x
INNER TUBES . . . . . . Schraeder valve
OTHER
SEATPOST . . . . . . . . . Steel
Outer diameter, mm
25.4
SADDLE . . . . . . . . . . . . Bontrager FS10 BMX
BRAKES . . . . . . . . . . . Alloy direct pullt
PEDALS . . . . . . . . . . . . Platform
Axle diameter
1/2"
SEAT BINDER . . . . . . . Alloy w/integral bolt
Inner diameter, mm
28.6
ADDITIONALS . . . . . . Pegs ( 1 pr.), SST Oryg rotor
COLORS
Matte Black · Blue/Black decals · Black fork
GEARING
44
16 55
FIT
Frame Size Pro
Handlebar Width, mm 635
Stem Length, mm 55
Angle 0
Crank Length, mm 180
Seatpost Length, mm 350
Steerer Length, mm 174
TR10
FRAMESET
MAIN TUBES . . . . . . . High tensile steel
STAYS . . . . . . . . . . . . . Hi Tensile steel
FORK . . . . . . . . . . . . . . Trek Dirt, 1 3/8" tapered
Axle-crown length, mm
322.0
HEADSET . . . . . . . . . . Tioga threadless
Size
21.2/32.5/26.4
Stack height, mm
40.5
CONTROLS
HANDLEBAR . . . . . . . Trek
Clamp diameter, mm
25.4
STEM . . . . . . . . . . . . . . Trek Jaws BMX
Steerer clamp height, mm
BRAKE LEVERS . . . . . Alloy, direct pull
GRIPS . . . . . . . . . . . . . Bontrager BMX
DRIVETRAIN
CRANKSET . . . . . . . . . Trek forged steel, 44T
Bolt hole circle, mm
1 piece
BB . . . . . . . . . . . . . . . . One-piece type
Shell x axle, mm
24 TPI,
CHAIN . . . . . . . . . . . . . KMC 410
Chain type
1/8"
Chain length (links)
88
CASSETTE . . . . . . . . . ACS Claw, 16T
WHEELSET
FRONT WHEEL . . . . . . Steel hub, 36°, 3/8" axle, Aluminum alloy rim
E.R.D., mm
406
Rim strip
Rubber
FRONT TIRE . . . . . . . . Knobby, square style
Tire size
20 x 1.95
REAR WHEEL . . . . . . . Steel hub, 36°, 3/8" axle, Aluminum alloy rim
E.R.D., mm
406
Rim strip
Rubber
REAR TIRE . . . . . . . . . Knobby, square style
Tire size
20 x 1.95
SPOKES . . . . . . . . . . . . 14G UCP
Front, mm
188, 3x
Rear, mm
186/186, 3x
INNER TUBES . . . . . . Schraeder valve
OTHER
SEATPOST . . . . . . . . . Steel
Outer diameter, mm
25.4
SADDLE . . . . . . . . . . . . Bontrager FS10 BMX
BRAKES . . . . . . . . . . . Alloy direct pull
PEDALS . . . . . . . . . . . . Platform
Axle diameter
1/2"
SEAT BINDER . . . . . . . Alloy w/integral bolt
Inner diameter, mm
28.6
ADDITIONALS . . . . . . Pegs ( 1 pr.), SST Oryg rotor
COLORS
Candy blue/Gloss Black · White/Red decals · Black fork
GEARING
44
16 55
FIT
Frame Size Pro
Handlebar Width, mm 635
Stem Length, mm 55
Angle 0
Crank Length, mm 180
Seatpost Length, mm 350
Steerer Length, mm 163
