I wanted to use these and thought using an adaptor would make it work. The shelf of the adaptor isn’t higher than the IS mount on the chainstay, so it doesn’t fit on.
Can I save this? Or do I need a new brake for the rear?
by oldtownalx
I wanted to use these and thought using an adaptor would make it work. The shelf of the adaptor isn’t higher than the IS mount on the chainstay, so it doesn’t fit on.
Can I save this? Or do I need a new brake for the rear?
by oldtownalx
5 Comments
Can you just add spacers / washers between the shelf and the caliper?
Other than what’s available on ebay and amazon, wolf tooth and [a.s. solutions](https://www.assolutions.ca/product-category/adapters/) make these adapters but i think you will run into the same issue. Plenty of IS to post adapters so best bet is to look for a used set of PM calipers IMO – that’s what I’ve done on a couple IS frames without too much trouble
Dummy checking in what does IS mount mean
if you can find ~2008 era shimano XT brakes I would get those. Those came in IS. Mine work so well still.
I see what you’re saying, OP; the design of that IS mount on the frame is going to preclude the use of a flat mount caliper. A couple of options I can think of; 1) get a post mount caliper and an IS/PM adapter, or 2) have a frame builder remove the IS mount and weld or braze on a flat mount. The frame builder is probably more expensive but may ultimately be a ‘neater’ solution.