SPIREX Oversized Ceramic Pulley Wheels for Shimano R9250 R8150 R9100 R8000 R7170 — 14T+17T Titanium Upgrade — Ultra-Light 76g
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The product on this page is SPIREX Oversized Ceramic Pulley Wheels for Shimano R9250 R8150 R9100 R8000 R7170. Its application is model-dependent, so the description focuses on the confirmed compatibility and specifications associated with this exact part.
An oversized pulley system can use different cage geometry from the stock derailleur, so compatibility should be confirmed by model rather than tooth count alone.
From the available specification data: material 6061-T6 aluminum alloy; weight 76g.
Rear-derailleur pulley components guide the chain through the cage. Pulley size, cage position and derailleur generation therefore matter when checking compatibility. Titanium parts are popular in lightweight builds because the material is lighter than typical steel hardware while remaining corrosion resistant.
The package and product details also list Pulley.
Pulley and cage hardware is influenced by cage design as well as derailleur model. OSPW and oversized systems can use dedicated screw lengths, spacers or mounting positions that differ from stock cages.
Technical Details
- Pulley
Product Specifications
- Weight: 76g
- Material: 6061-T6 aluminum alloy
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