The rotor bolts have ridges that lock into them when they tighten.
If in doubt look the code up on si.shimano
pickles55 on
They are like washers, they help to make sure that none of the screws can loosen once they are all tightened to the right torque. If you already put the rotor on you messed up
daern2 on
Sit between the bolt heads and the rotor as a form of retention device to stop loose screws. Dab of threadlock (unless the bolts are already treated) won’t go amiss either.
Be aware that they are sided – “TOP” should be visible when fitting the bolts.
wide_asleep_ on
I just installed my new rotors and left them off. Haven’t ridden with it yet, but I’ve gone a lot of years with only the manufacturer dry loctite and never had a problem. Torque them and check them after a few rides.
6 Comments
https://www.jensonusa.com/Shimano-6-Bolt-Rotor-Fixing-Bolt-Kit-6-Bolts-with-3-Fixing-Washers-2Nd-Gen?loc=usa&gad_source=4&gclid=CjwKCAiAq4KuBhA6EiwArMAw1Ds5_lVBzYnBQMWxsXHO-pSMYWlmdecn3hKlm-3ywcIZEp23qkbEdhoCS10QAvD_BwE
I think these are for screw retention.
The rotor bolts have ridges that lock into them when they tighten.
If in doubt look the code up on si.shimano
They are like washers, they help to make sure that none of the screws can loosen once they are all tightened to the right torque. If you already put the rotor on you messed up
Sit between the bolt heads and the rotor as a form of retention device to stop loose screws. Dab of threadlock (unless the bolts are already treated) won’t go amiss either.
Be aware that they are sided – “TOP” should be visible when fitting the bolts.
I just installed my new rotors and left them off. Haven’t ridden with it yet, but I’ve gone a lot of years with only the manufacturer dry loctite and never had a problem. Torque them and check them after a few rides.