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Old 12-14-06, 10:28 AM
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TallRider
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Don't worry about going 10-speed, unless you want 10-speed for its own sake. If you want a slightly lower gear you can get 12-27 9-speed cassettes, but I'd recommend you just ride the 12-25 for awhile and see if you ever find yourself wanting a lower gear. It'll cost you a lot of money to update to 10-speed.

On cranks, specify what sort of crank/bb you'll be using. There's square-taper, Octalink and integrated crank/bb systems. New 105, Ultegra and Dura Ace are all integrated (what Shimano calls Hollowtech II) designs. Last year's 105 was Octalink, and Ultegra was Octalink a couple of years ago. I think the switch to an integrated crank/bb system coincided with the move to 10-speed.
Btw, Ultegra triple and double octalink cranks took same bottom bracket lengths as 105 octalink cranks.
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