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I'm worried about long and steep descents like 10% avg incline, 15km long, hairpins and blind curves. Not sure if you have tried something like that where you live :(. I got friends that do that with 140 front and rear, but they have a common weight/height, I'm 6'3" and trying to keep under 85kg, but like to recover descending what the midgets normally get away from me on the climbing.
Be aware that my Kinesis Racelight 4S Disc, and also @TurtleRecall frame, has problems with a 160rotor in the rear brake (with problems I mean a mayor rubbing because there is only a 1mm clearance, but they don't confirm if its a design problem or a batch welding problem... they just sent me a 140mm adaptor)... maybe the Aithein has the same problem, but they didn't answer that neither