IS-PM adapter for 140mm discs

Giraffoto

This isn't the same topic as I posted a week or so ago, asking about an adapter for 185mm discs.

I have a frame with IS tab mounts on the chainstay, and a post mount Shimano caliper (M596)

I'd like to fit a 140mm disc on the back, partly to save a tiny bit of weight but mainly because I figure it'll give fractionally more useful braking between "slow down" and "lock" for a light (8 - 10 year old) rider.

Is there such a thing as an adapter that will do this job, and can anyone recommend one?

mrmonkfinger

Any front IS-PM 160mm adaptor should work - front adaptors make a 20mm smaller adaptor when fitted at the rear.

Giraffoto

mrmonkfinger wrote:

front adaptors make a 20mm smaller adaptor when fitted at the rear.

That's handy to know, and explains a thing I'd long wondered - why the adapters come as front or rear. Thanks!