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blur 4x 1 hero 1
blur 4x 1 detail 2
blur 4x 1 detail 1

Overview

Model Version:4X 1
Production Start:2004
Production End:2007
Suspension/Pivot System:VPP - Virtual Pivot Point
Material:Aluminum - 6000 series
Rear Wheel Travel:115mm
Size Range:M, L

Frame Specs

Compatible Forks:100mm to 160mm - 160mm travel max
Headtube/Headset:1-1/8" Straight - External. S.H.I.S EC34/28.6 EC34/30
Seat Post:30.9mm - Minimum insertion 100mm
Front Derailleur:34.9mm Top Pull/Top Swing (Low Clamp)
BB Shell Width:68mm - Threaded - ISO
Chainline Spec:50mm
Recommended Max Tire Size:2.2 - may vary by tire and rim model
Brakes:Rim Brake and ISO Disc Brake Mounts
Max Brake Rotor Size:160mm
Rear Hub:135mm x 10mm (QR style)
Seatpost Clamp:34.9mm

Shock Specs

Rear Shock Eye-to-Eye:7.875” / 200mm
Stroke:2.0" / 50mm
Mounting Bushing Width Front:22mm
Mounting Bushing Width Rear:18mm
Mounting Bolt Diameter Front:8mm
Mounting Bolt Diameter Rear:3/8” (9.53mm)
Leverage Ratio:* 2.3 : 1 - *Note: All VPP leverage ratios vary throughout the travel, so there is not a constant linear ratio. This is the average
Rear Shock Setup:Because it is highly likely the original rear shocks on older models are repaired/replaced/ upgraded throughout the lifetime of the frame, we offer some very basic tuning guidelines, and recommend using the original rear shock manufacturers manual for more detailed set-up for the specific rear shock you have. Contact the rear shock manufacturer for info if you do not have it.The key component for set-up with any rear shock here is sag. Once you have that set-up correctly, the rest of the shock settings are fine tuning adjustments (Rebound and Compres- sion damping, etc.) set to rider preference.Recommended sag is 10-15mm at the shock shaft - This equates to approximately 20-30% of the total rear wheel travel. Less sag = a firmer suspension feel.For Air rear shocks, set the air pressure to match the recommended sag. Typically for this model the PSI is equal to rider weight (150lb rider = 150psi) but again this varies by rear shock model.

Torque Specs

FastenerDescriptionPrepTorqueDownload
Custom M8 X 1.25Loctite 24280 inch lbs-
M5 X .8 X 8 allen head cap screws with washersGrease90 inch lbs-
M6 X 1 X 8 allen head cap screwLoctite 24270 inch lbs-
M5 X .8 X 6 allen head cap screws with washersLoctite 24260 inch lbs-
M8 X 1.25 X14 allen head cap screwloctite 24260 inch lbs-

Replacement Parts

Propack Part Number:04-05059 (Alloy Link) 04-05060 (Ti Link)
Bearings-Only Part Number:04-05037
Dropout/Derailleur Hanger:04-05021
Upper Link:04-05053
QR Seatpost Collar:34-15543
Bearing Press and Removal Tool:10-05032
blur 4x 1 geometry