789 Reamer: 55.95mm Bike Tool

This 55.95mm bike reamer is an essential accessory and replacement part for Park Tool head and steerer tube cutting tools. It reams the head tube ID to 55.95mm, fitting 'internal' headset cups with an OD of 55.99 - 56.04 (1-1/2' ZS standard). Works with the 690-XXL Facing Cutter and 750 Centering Cone Adaptor, suitable for upper and lower head tubes using ZS56 or EC56 headsets.

Using this bike reamer is straightforward. First, make sure you have the 690-XXL Facing Cutter and 750 Centering Cone Adaptor ready. Then, use the reamer to get the head tube ID to 55.95mm so it can accept the right headset cups. When using, take your time and work carefully to ensure a good fit. As for maintenance, clean the reamer after each use to remove any debris. Keep it in a dry place to prevent rusting. This way, your reamer will last a long time and always work well for your bike repairs.