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Need help w/ small gearing for big mountains(5 posts)

Need help w/ small gearing for big mountainstrijjj
Apr 20, 2001 3:57 PM
I'm currently using a Ultega Triple with a 12/25 9 speed cassette. I am planning to do some riding in the Colorado mountains this summer and am wondering how little (or big, not sure which is the proper term) of a cassette is practical with an Ultegra Triple setup. I've seen a 12/27 cassette for sale, seen a post about a 13/29 (but can't find one for sale) Also, if you know who's sells this stuff, that would be great too. I've been up some steeps with my 12/25 and would like a little more available on the low end. I assume you can't pop a MTB 9 speed cassette on back or can you?
Yeah, you can.Spoke Wrench
Apr 20, 2001 7:15 PM
Mountain bike cassettes will work just fine on road bikes provided that you also use a mountain bike rear derailleur and a longer chain. In fact, that's a fairly common modification for enthuiast riders in hilly aareas.

My Santana tandem came stock with Ultegra STI shifters, an Ultegra triple crankset and front derailleur, and a mountain bike 11/32 cassette with an XTR rear derailleur. Everything works together just fine.
re: Need help w/ small gearing for big mountainssteveF
Apr 22, 2001 8:26 PM
The 13/29 cassette is for Campy Record and Chorus components, probably only 10 speed.
How Big is Big?grz mnky
Apr 25, 2001 9:41 AM
Since you're asking it's probably worth your while to figure out the % grade of the hills you're planning on climbing. This info then combined with your ratios will give you an idea of what to expect. It also helps to plan things out - nothing quite like doing a hard ride and then finding out you just have one more hill to climb, but it's 19% for 900' of vertical (ala the Terrible Two).......at mile 160. :^/

Gearing is critical, but we're all a bit different so what works for one person may not work for someone else. Some of like to spin a bit while others are OK with mashing. See if you can find some local hills with equivalent grade (even though you don't have the length or altitude) and see what it feels like to climb them.

Colorado has some good vertical.
re: Need help w/ small gearing for big mountainstrijjj
Apr 26, 2001 12:05 PM
Thanks for the replies, great advice! I wasn't sure about mixing MTB component was an option, but it sounds like the best route and probably not too costly or difficult. I have an idea on the grade so I should be able to do some test rides and figure out the ratios I'll need. Thanks again everyone.