安装brompton bb中轴曲柄 Install Rotor Crankset on Brompton

Bike Model: 2018 Brompton 6-speed Original with Shimano ISIS BB and Brompton original 50T crankset. I changed it to Rotor Bsa 30 BB, Rotor DM Qring 46T, with 160mm crank arm. Reason to change it: Original 170mm arm was too long for me. My first plan was to change crank arm to 165mm, but my order form eBay got lost after three months. Trying oval ring is in my wish list, so these happened. Some common tools: Hex. Grease, soft hammer, Special tools I recommend: Removal: 1. Get a crank puller if you want to reuse the original cranksset. 2. Shimano BB removal tool (20 tooth) Installation: 1. A torque wrench with more than 40NM reading ps A crank puller would help a lot.