VelopediaBicycle Archive · Specification report

2001 K2 Attack 4.0

Velopedia Archive ID 35334

Overview

Model year2001
BrandK2
ModelAttack 4.0
Bicycle typeMountain bike, front & rear suspension
Archive ID35334
Original MSRP$1,299.00
ColorsWhite and Black two-toned
SizesLarge, medium, small, way big
Weight29.6 lb

Frameset

Frame constructionTIG-welded
Frame material7005 aluminum
ForkNoleen Mega Air, 4.0" travel
Fork materialTriple-clamp
Rear shockNoleen Sport Adjustable, 4.5" travel

Drivetrain

Component groupMountain Mix
ShiftersShimano Deore RapidFire SL
Front derailleurShimano LX
Rear derailleurShimano LX
CranksetTruVativ Fire-SX
Bottom bracketCartridge
Rear cogs9-speed, 11 - 32 teeth
ChainKMC Z9000, 1/2 x 3/32"
PedalsWellgo M9 clipless

Brakes

BrakesAvid Single Digit 3 brakes, Avid Speed Dial 5 levers

Cockpit & contact points

HeadsetWTB Momentum Comp ST
HandlebarK2 aluminum riser
Handlebar extensionsNot included
StemAluminum Ahead type
SaddleWTB SST.X3
Seatpost3D forged aluminum micro-adjust

Wheels & tires

HubsWTB SpeedDisc XC
RimsWTB SpeedMaster, 32-hole
SpokesWTB stainless steel, 15/15g
Front tire26 x 2.10" WTB VelociRaptor
Wheel size26" wheels

Geometry · Legacy reference

Top tube569 mm
Head-tube angle70°
Seat-tube angle73.5°
Chainstay / rear center436.9 mm
Wheelbase1087.1 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 30, 2026.