As some of you know, I was on a set of XTR/XT discs last season (Sept - Jan). For the first 4-6 weeks, the brakes were fantastic. Then, the infamous SPS (sticky piston syndrome) started to occur....first in the front and then the rear. Despite all my best efforts to remedy the SPS, nothing worked. This included lubing the pistons/seals with a light lube (as recommended by Shimano USA), cleaning the pistons with White Lightning Clean Streak and NOT lubing (as recommended by Shimano Canada), etc....nothing worked. So, once I had some downtime, the brakes were sent back to Shimano Canada for warranty. I received 2 new calipers.
Without evening trying the new calipers, I sold the brakeset to a riding buddy. Similarly, for the first 4-6 weeks, the brakes were great...until last week. Now, the SPS has returned to the warrantied calipers and it looks like they'll be going back to Shimano yet again for the same issue. What a pain!
Fortunately, my buddy has a back-up set of Magura Louise he can use in the interim, but I'm not holding-out too much hope since there is a severe issue with getting anything Shimano right now.
I'm curious if others who have had their brakes warrantied due to SPS have had similar, re-occuring issues with their new, warrantied calipers?
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