Newly spaced 135mm rear wheel info posted in this thread:
http://www.bikeforums.net/tandem-cyc...l#post16899388
After installing the new Saint RT99 ICE rotor and observing the TRP Spyre pad markings on that, it became apparent the 203mm Avid adapter I was using needed some 2-3mm of spacers to lift it further outboard (it was sitting too far to the middle of the rotor). After repositioning the caliper, the TRP braking is feeling very nice indeed. I went back to TRP to order their taller 203mm adapter and found it only available
from the Teckro (parent) website.