Road Bike Stem Bolt Torque

Never ever follow the stem component instructions for torque if you own a carbon frame.

Road bike stem bolt torque. There are a few stem designs that require that the top or bottom bolts to be fully tightened before the other side. A typical torque spec is 4 6 nm. 44 60 lb in 4 9 6 8 nm rear derailleur mounting bolt. Never had anything close to an issue with the lower than max torque.

If you have an aluminium steerer then it s fine for the stem to be proud of the steerer. March 2009 edited march 2009 in workshop. Shane miller gplama 13 582 views. Torque the pinch bolts.

You need to make sure that the top edge of your stem or steerer spacer is around 3mm proud of the top of the steerer tube. The specs on alot of my parts like the carbon stem and seatpost clamp indicate a max torque of 5nm which was way more than i would have done if i was just hand tightening. I found that if i torqued down to 4 5 the top bolt looked much tighter than the bottom one. As you apply torque to the top cap bolt the bearing is loaded effectively pulling the fork steerer upwards.

Threaded stem bolt quill type controltech 16 3 19 nm 144 168 in lbs shimano 19 6 29 4 nm 174 260 in lbs threadless stem fork column bolts controltech 13 6 16 2 nm 120 144 in lbs deda 8 nm 71 in lbs fsa carbon 8 8 nm 78 in lbs syncros cotter bolt 10 1 nm 90 in lbs thomson 5 4 nm 48 in lbs time monolink 5 nm 45 in lbs race face. Install the new stem and spacers. 25 35 lb in 2 8 4 nm front derailleur. How to replace a bicycle stem threadless.

I was adjusting a few things on the bike and i wanted to torque down the headset and stem a bit. Road cycling forum workshop. Tacx torque wrench 1 4 5 25 nm. The gap was closer.

Then make sure the top bolt is tight and you re ready to ride. 106 124 lb in 12 14 nm chainring bolts. 5 just seems like way to much. Torque wrenches available to general industrial work including bicycle work are typically accurate to plus or minus four percent.

In other words a torque wrench set for 100 in lbs might tighten to 96 in lbs or 104 in lbs. I still only torqued my stem front cap and stem bolts to 4nm. 350 435 lb in 39 5 49 2 nm chainring bolts. Set the bike on the ground and ensure that all components are fully seated.

Whilst out riding this weekend my handlebars slipped round in the stem clamp. This reduces stress on the bolt heads. The stem reads recommended torque 4 5 nm it s a carbon specialized stem and the steerer is carbon too. If it s binding loosen the top bolt turn counterclockwise slightly until it does turn easily and smoothly.

There are basically three types of torque wrenches the beam type the click type and the dial type. To finish and lock the adjustment check to ensure the stem is aligned and tighten its bolts to the right torque.