VelopediaBicycle Archive · Specification report

1999 AMP Research B4

Velopedia Archive ID 87888

Overview

Model year1999
BrandAMP Research
ModelB4
Bicycle typeMountain bike, front & rear suspension
Archive ID87888
Original MSRP$2,065.00
ColorsCandy Apple Red, Polished
SizesLarge, medium, small, xsmall
Weight24.3 lb

Frameset

Frame constructionTIG-welded
Frame materialAlcoa Alcalyte 6013 T6 aluminum
ForkAMP Research F3 XC, 2.25" travel
Fork materialAlcoa Alcalyte 6013 T6 aluminum, linkage crown
Rear shockAMP Research, 3.0" travel

Drivetrain

Component groupShimano Deore XT
ShiftersShimano Deore XT RapidFire SL
Front derailleurShimano Deore XT, bottom-pull/clamp-on 35.0mm
Rear derailleurShimano Deore XT GS
CranksetShimano Deore XT, 22/32/44 teeth
Bottom bracketShimano Deore XT, 110.5mm spindle
BB shell width68mm Threadless
Rear cogs9-speed, 11 - 34 teeth
ChainShimano CN-IG90, 1/2 x 3/32"
PedalsPlatform

Brakes

BrakesAMP D1 Hydraulic Disc Brake System brakes, Shimano Deore XT levers

Cockpit & contact points

Headset1 1/8" threadless Ritchey Logic
HandlebarHsin Lung aluminum
Handlebar extensionsNot included
StemHsin Lung aluminum
SaddleSerfas Lola
SeatpostJD Components, 31.6mm diameter

Wheels & tires

HubsFront: AMP Research D1, Rear: Shimano Deore XT
RimsMavic X221, 32-hole
SpokesDT stainless steel, 2.0mm double-butted
Spoke nipplesAlloy nipples
Front tire26 x 1.90" Hutchinson On The Rocks
Wheel size26" wheels

Geometry · Legacy reference

Top tube574 mm
Head-tube angle71°
Seat-tube angle73°
Chainstay / rear center426.7 mm
Wheelbase1066.8 mm
Fork offset / rake48.3 mm

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 22, 2026.