The OSPW RS ALPHA for Shimano 105 Di2 R7150 brings CeramicSpeed's oversized pulley technology to Shimano's 12-speed electronic 105 groupset.
Why oversized?
Larger pulley wheels mean the chain bends less as it wraps around them, which cuts drivetrain friction. Combined with CeramicSpeed's hand-built hybrid ceramic bearings, an OSPW system is one of the most effective drivetrain upgrades you can make.
ALPHA technology
- ALPHA Disc pulleys with patented ADR (Active Debris Remover): stainless dust shields and a bladed groove that pushes contamination away from the bearing
- Hand-built hybrid ceramic bearings
- Injection-moulded carbon cage
- Hand-built in Denmark with a lifetime warranty
Available from The Cycle Collective in Dorking. Our workshop can fit and set up your OSPW system.
Product Information
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Tech Specs