VelopediaBicycle Archive · Specification report

1998 K2 ProFlex 5000C

Velopedia Archive ID 78857

Overview

Model year1998
BrandK2
ModelProFlex 5000C
Bicycle typeMountain bike, front & rear suspension
Archive ID78857
Original MSRP$4,249.00
ColorsNatural carbon
SizesLarge, medium, way big

Frameset

Frame constructionLaminated carbon fiber
Frame materialCarbon-reinforced thermoplastic
ForkNoleen Cross-Link CS
Fork materialCarbon fiber composite, linkage crown
Rear shockK2 Smart Shock, 4.0" travel

Drivetrain

Component groupShimano XTR
ShiftersShimano XTR RapidFire SL
Front derailleurShimano XTR top-swing, bottom-pull/clamp-on 31.8mm
Rear derailleurShimano XTR SGS
CranksetShimano XTR M950, 24/34/46 teeth
Bottom bracketShimano BB-M950, 113mm spindle
BB shell width73mm English
Rear cogs8-speed, 12 - 32 teeth
ChainSachs PC-51, 1/2 x 3/32"
PedalsK2 Mag T

Brakes

BrakesShimano XTR V-Brake brakes, Shimano XTR levers

Cockpit & contact points

Headset1 1/8" Syncros
HandlebarSyncros Hardcore
Handlebar extensionsPolygon
StemSyncros Hardcore
SaddleSelle Royal
SeatpostSyncros Hardcore aluminum, 27.2mm diameter

Wheels & tires

HubsShimano XTR
RimsSun Rims Sub 432, 32-hole
SpokesDT stainless steel, 2.0mm double-butted
Spoke nipplesAlloy nipples
Front tireFront: 26 x 2.10" Panaracer Mach SS, Rear: 26 x 2.10" Panaracer Mach SK
Wheel size26" wheels

Geometry · Legacy reference

Top tube587 mm
Head-tube angle70.7°
Seat-tube angle72.7°
Chainstay / rear center436 mm
Wheelbase1089 mm
Fork offset / rake44 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 29, 2026.