Forum menu
Swapping over some rings from an xt 770 chainset onto slightly earlier xt cranks fory boys bike build and found the old ones have a squared off tab that the newer middle ring sits on rather than in. Can anyone tell me if it's ok to pop a washer under or do I need to buy a new ring for that old model crank?
stuggling to understand quite what you mean TBH, but if you do go down the replacement route, just get some deore chainrings, cheap as chips, last well and weigh a couple of grams more then XT. You might need to file the ring tab back a bit to make them site into the tab....OHHHHHH, is this what you meant? If so just file off the excess on the M770 rings to make them fit into the tab seat (works fine)
sorry, was on my phone any typing is a pain.
on the older xt cranks the middle chain ring sits into a slightly recessed part of the spider (if thats the correct term). to locate it the recess edge is square.
on the xt 770 cranks there is no recessed part its just flat. so when i put the xt 770 middle ring on the older crank it does not sit into the recessed part but onto the edges. hence a small gap.
770..
http://clee-cycles.co.uk/esite/P1453/product
but you are right z1ppy, a deore is a tenner. less faff than finding washers.
You can just file the plastic/steel off the m770 chainring to fit the crankset, I've done the same with an SLX ring previously. Or jut buy the Deore, if you don't fancy doing that
good solution, had'nt thought of that. cheers.