I was thinking along those lines also. The 2x10 trend is kind of moving some low, centralized mass and moving it to the rear wheel, increasing unsprung weight.DeeEight said:I weighed one of the SLX 12-36 9sp cassettes and it was a pound.... I fear what the 10 speed version will come out at. Cheaper...sure... lighter...not so much. In comparison, the 11-28 SLX 9s cassette was 228 grams. Personally I'd rather build a triple ring setup with 20-30-42 rings around that cassette than a double-ring with the 12-36 or future 11-36.