This adaptor makes 135mm (Specialized SCS) or 148mm (Boost) rear MTB axles compatible with any older style classic wheel-on stationary home/wind trainers.
- Stainless steel construction for durability.
- Compatible with 5mm Allen for easy installation.
- 135 x 12mm rear axle - Specialized SCS - Carbon Crux (2016 only), Carbon Diverge (2015-2017), Carbon Roubaix (2015-2017)
- 148 x 12mm rear axle (Boost MTB).