Designed for both road and off-road use, ALPHA Pulley Wheels bring our most advanced durability technology into a compact, stock-size format.
Installation
Remove the stock pulley bolts and pulley wheels
Remove the stock pulley bolts and pulley wheels, you will reuse the pulley bolts.
Install the pulley marked U in the upper position
Install the pulley marked U in the upper position with the text facing out (away from the wheel) with the ADR dust cover on each side of the pulley.
Install the pulley marked L in the lower position
Install the pulley marked L in the lower position with the text facing out (away from the wheel) with the ADR dust cover on each side of the pulley.
Tighten pulley bolts to a torque of 3 Nm.
Compatibility Chart
| Derailleur | Upper Pulley | Lower Pulley | Upper Dust Shield | Lower Dust Shield |
|---|---|---|---|---|
| Shimano R9250 | 11 | 11 | 2x A | 2x A |
| Shimano R9150 | 11 | 11 | 2x D | 2x D |
| Shimano R8150/R8050/R7150/R5800 | 11 | 11 | 2x B | 2x B |
| Shimano RX827/RX822 + MTB 12s | 13 | 13 | 2x B | 2x B |
| Shimano RX825/RX820 | 11 | 13 | 2x B | 2x B |
| Shimano M9100 | 13 | 13 | 2x D | 2x D |
| SRAM Red/Force E1 | 12 | 14 NW | 2x C | 2x A |
| SRAM Red D1 + Force D2/D1 + Rival E1/D1 | 12 | 12 NW | 2x C | 2x A |
| SRAM XPLR Red/Force/Riva E1 + Transmission XXSL/XX/X0 | 14 NW | 16 NW | 2x D | 2x D |
| SRAM XPLR Red/Force/Rival D1 | 12 | 12 NW | 1x A + 1 x E | 2x A |
| SRAM Eagle XX1/X01 AXS + XX1/X01/GX | 12 | 14 NW | 1x D + 1 x F | 2x D |
ADR Dust Sheilds measures
| Width | Ø | Engraving |
|---|---|---|
| 6,4 mm | 5,1 | A |
| 8 mm | 5,1 | B |
| 6,4 mm | 4,1 | C |
| 7,5 mm | 5,1 | D |
| 6,4 mm | 6 | E |
| 7,5 mm | 6 mm | F |
Maintenance
ALPHA Pulley Wheels are equipped with ADR, Active Debris Remover, bearing protection. Maintenance of the bearings should occur at least one to two times per year, every 10.000 km/6.000 miles in normal conditions, or every 5.000 km/3.000 miles in extreme or harsh conditions.
Disassemble the cage
Disassemble the cage by removing the two cage bolts, take both pulleys and remove the stainless-steel ADR dust shields.
Carefully remove the bearing seals
Carefully remove the bearing seals and flush the bearings following the UFO Bearing Cleaner instructions.
Wipe down all parts
Wipe down all parts and inspect bearing seals and ADR dust shields for wear or damage.
Apply a few drops of UFO Pulley Oil
Apply a few drops of UFO Pulley Oil and reinstall the pulley bearing seals.
Take careful note of the rotation direction
Take careful note of the rotation direction of the pulleys and placement of upper and lower position during reassembly. The cage bolts are torqued to 3,0Nm.
FAQ
Find quick answers to our most frequently asked questions.
What is different from ALPHA Disc on OSPW?
The ALPHA Disc used for OSPW Systems features an alloy disc core to provide the ultimate in structural durability for our largest pulley sizes.
How does performance compare between ALPHA Pulley Wheel and OSPW systems?
ALPHA Pulley Wheel reduces bearing drag between 10-20%from stock. Increasing the Pulley Wheel size and customising spring tension increases efficiency up to 45% from OEM, or more than twice the benefit of stock size ALPHA Pulley Wheels.
How does ALPHA Pulley Wheel compare vs stock for weight?
The ALPHA Pulley Wheels are custom moulded in a lightweight composite polyamide for durability and long life, however the stainless ADR dust shields do add a small amount of weight, ranging from 1-8 grams heavier per set compared to stock pulleys.
Can ALPHA Pulley Wheels be used on more than 1 derailleur?
If the pulley tooth count is the same, you only need to swap the ADR dust shields to change the derailleur compatibility of the pulleys.
What about coated?
No need, our hardened stainless-steel races perform exceptionally and eliminate the need for the additional coating process and come with a lifetime warranty.
No Campagnolo?
At launch, we will support the most common derailleur models in the market. Additional compatibilities will be evaluated and added in the future.
