Join Date: Mar 2010
Bikes: Bianchi, Specialized, Raleigh
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Confirmed - 9 of 10 on 7 works!
No spreading of frame necessary. I upgraded old bianchi 126mm rear spacing with 6600 group 2x10. Kept the old wheels with 7 speed cassette/hub. I took old cassette off. Modified the 10 speed cassette minus one cog. put the extra spacer at the very back near wheel, then place "9" speed cassette then lock ring. I used 10 spd chain and tuned the shifters & derailleurs. Smooth shifting, no skipping or delays.