Description: This adaptor is compatible with mainstream bike computer, stopwatch. It can reduce the wind drag and reduce the head angle change when reading data. Suitable for bike stem diameter is 28.6mm. The installation method is similar to the headset washer (Unscrew the bowl cover to fix the holder, then tighten the cover.) Specification: Material: Carbon Fiber, Plastic Length: approx. 10cm/3.9inch Application: Fit for 28.6mm bike stem Color: Black Package Includes: 1 Piece Bike Computer Holder
