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Help with Cassette size(5 posts)

Help with Cassette sizerookierider
Jan 2, 2003 3:27 AM
I'm equipping my new bike with Dura Ace triple. Can anyone offer thoughts on best cassette combo to go with? I'm a recreational rider but have lots of hills where I live. Thanks
re: ... let your own gams be your guide...Akirasho
Jan 2, 2003 4:22 AM
... given the information you've provided, there's not a lot most of us could offer save judge by your own abilities, or desired abilities (after training).

Indeed, one of the draws for a triple will be that inner ring, but with this many cogs, you're bound to get a few overlaps... base your decision on where best you (personally) can capitalize on a minimum of ratio overlaps while remaining efficient... you or your LBS can work out a few ratios (there are some online gear calcs available) to see where you stand.

http://www.sheldonbrown.com/gain.html

What cogs were you looking at??

Be the bike.
re: Help with Cassette sizeKeeponTrekkin
Jan 2, 2003 5:44 AM
I live on top of a big hill. For me, range is far more important than gear duplications (which seem to be the focus of many gear calculators).

With DA, you can choose a 12-27 or 12-25. Not popular with many as the 2-tooth gaps result in bigger gearing jumps. However, if 30-27 and 30-24 are important to you vs. 30-23, get it.

You can climb while standing and climb while sitting. That triple is there to increase the number of hills you can take while sitting - if that's what you want.

Analysis help at: www.analyticcycling.com. See how steep you can climb with different gearing at a given power level (e.g. sitting)
re: Help with Cassette sizeChen2
Jan 2, 2003 6:59 AM
Depends on where and how you ride. My guess would be an Ultegra 13-25, closer ratios so that you don't have to shift the front too often. Save the granny gear for those really tough hills late in the ride. Big cogs in the back will let you stay on the big ring and middle ring most of the time. Your highest gear combination would be a 53-13 which is good for about 33mph at 100rpm cadence. Faster than that you probably won't be pedalling anyway. If you really want the lighter D-A cassette then you can choose a 12-25 and convert it to a 13-25 with a 16 in the middle if you want to.
~Al
re: Help with Cassette sizejrm
Jan 2, 2003 10:06 AM
I would go with a 12-27. And if you want more you can reconfigure the rings on the crankset.