Blur 4X 1
| 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 |
Model 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. |
Geometry
Torque Specs
| Fastener | Description | Prep | Torque | Download |
|---|---|---|---|---|
| Custom M8 X 1.25 | Loctite 242 | 80 inch lbs | - | |
| M5 X .8 X 8 allen head cap screws with washers | Grease | 90 inch lbs | - | |
| M6 X 1 X 8 allen head cap screw | Loctite 242 | 70 inch lbs | - | |
| M5 X .8 X 6 allen head cap screws with washers | Loctite 242 | 60 inch lbs | - | |
| M8 X 1.25 X14 allen head cap screw | loctite 242 | 60 inch lbs | - |