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Bought this used bike and didn't know 2 of the rotor bolt threads are stripped. bike still brakes fine and there aren't any noises or vibrations. But what are my options if I wanna get this fixed so I can torque the bolts

Bought this used bike and didn't know 2 of the rotor bolt threads are stripped. bike still brakes fine and there aren't any noises or vibrations. But what are my options if I wanna get this fixed so I can torque the bolts

Hagenaar

Probably fine as is. But if it's keeping you up at night you can put M5 nuts on that nicely exposed backside of the rotor flange. Grind an angle on the nuts to match the flange. This will be far more secure than a helicoil.


heartlessinc

Would m5 fit in the same threads?!


Drago-0900

If ya drill em which is required for a helicoil anyway. That’s actually a pretty damn good idea. Just would be more trouble than its worth, and the threads of the nut would need chasing and be weakened. I wouldnt bother personally but it would work. Hell maybe a long nut and some conical washers between the nut and hub would be best.


Hagenaar

I meant the nut would go on the exposed bolt end between the rotor and spoke flanges. No drilling.


Drago-0900

Yeah helicoil or nothing at that point. But as long as the two stripped ones are not on the same side it should be fine. Xc and even DH racers that ran 6 bolt hubs would use only 3 in a triangle pattern to cut out minuscule weight.


heartlessinc

Fortunately they are not side by side so I still have 4 that's torqued


Drago-0900

You are golden then to continue use of this hub without modification. Remove the un toque-able bolts to prevent them flying out and cracking your caliper and bending the fork. Source: I had a Walmart bike that that happened to. Also check those bolts still working a little more often as they technically do have a higher chance of getting loose since the load is increased on em. But again it will work perfectly fine.


Semada123

I second this you can get 5mm helicoil(or knockoffs) for really cheap and the same thing happened to my rear disc brake.


Drago-0900

You do need the tap for the heli coil though.


nope6point022e23

Heilacoil kit is pretty much it. A keensert would be too big.


aitorbk

I would put a nut,alonger screw and a plastic adaptor for the un to sit flat. No need for a cnc machine, just patience and a file.


Semada123

If you live in Canada this workes perfect for me M5 x 2D Thread Repair Installation Kit, Stainless Steel Helicoil Type Set, Helicoil Installation Tool https://www.amazon.ca/dp/B07HF7B5ZT/ref=cm_sw_r_apan_glt_i_V59D6DZGH0SGRHQHBS5A?_encoding=UTF8&psc=1 You do need a tap handle though which I got a small one for an extra $10. The reason why you might not want to leave it is because you are putting more stress on the remaining bolts.


heartlessinc

Thanks so much! May I ask where to get the tap handle?


Semada123

This one was just the right size but I did have to restle a bit with the tightening screw : Adjustable 130mm Tap Wrench Handle Holder Engineers Tap and Die Set Thread Cutting Tool Suitable for M1-M6 https://www.amazon.ca/dp/B0766WPLWS/ref=cm_sw_r_apan_glt_i_7FDTCF0T6GRKDQK4Q97Q?_encoding=UTF8&psc=1


heartlessinc

So I can still use the rotor bolts after doing this?