The place to come to share your technical expertise, or just find out what the little springy thing is that's just pinged out of sight under the work-bench.
being as they use the same calipers and the bars are the same diameter then yes they'll work. They are however different in the fact that the 90 has an integrated reservoir cast as part of the MC whereas if my memory is right the RU uses a seperate plastic reservoir same as the R1 style (i'll stand corrected)
