Chain/Skid Plate
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I have the PRM Skid Plate and had the same problem. I'm running 17-37 gearing. Is your friend also running the 17 counter sprocket? If so, the problem is in obtaining proper chain adjustment without the brake rotor hitting the skid plate.
When I installed my 17-37 sprockets and put the PRM skid plate back on, the brake rotor hit the plate when properly adjusting the chain tension. I couldn't shorten or lengthen the chain to make it not hit the PRM so I cut a slot in the PRM which allows the brake rotor to clear it. The finished slot is just wider and a little longer than the brake rotor. I have been rock bashing and the skid plate, where the slot is, is holding up just fine. I cut the slot clear through the PRM. The bad news is you have to install the PRM to properly and accurately measure and mark where the slot goes. Then remove, cut, re-install and repeat as necessary until you get it right. I guess another option would be to reduce the brake rotor diameter.
I don't know of any other skid plates that may not have this clearance problem.
When I installed my 17-37 sprockets and put the PRM skid plate back on, the brake rotor hit the plate when properly adjusting the chain tension. I couldn't shorten or lengthen the chain to make it not hit the PRM so I cut a slot in the PRM which allows the brake rotor to clear it. The finished slot is just wider and a little longer than the brake rotor. I have been rock bashing and the skid plate, where the slot is, is holding up just fine. I cut the slot clear through the PRM. The bad news is you have to install the PRM to properly and accurately measure and mark where the slot goes. Then remove, cut, re-install and repeat as necessary until you get it right. I guess another option would be to reduce the brake rotor diameter.
I don't know of any other skid plates that may not have this clearance problem.
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