Race Face Turbine SL StemOne stem. Two solutions. Designed for up to 140mm travel bikes, Turbine SL gives riders the choice of running a negative ( 6mm) or positive (+6mm) offset. Whether you prioritize XC efficiency or comfort and descending confidence, this is a stem that matches your bikes versatility. Short travel is cool again. Turbine SLs default orientation is negative offset, giving riders better climbing control and pedaling efficiency. In this orientation the stems