GCN: How to Properly Use a Torque Wrench

There is plenty of good advice in this 5 minute video. You have probably noticed that the torque specification on most stem bolts is 5 nM, but most preset torque keys are 4 nM. (Editorial note/correction I usually write these posts off the top of my head and maybe fact check them later. Most of the popular torque keys have a 4 mm head, but they are 5, not 4 NM). In most cases, the torque specification imprinted on bicycle components is a maximum setting. According to GCN, it is generally advisable to start about 20% lower.