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Cross gearing(6 posts)

Cross gearinggirodebirdman
Aug 12, 2001 3:04 PM
Hi. I am new to cross. I am assuming for races I will want to use a 12-27 cassette on the rear: what about up front? And for training on steep logging roads, as well as single track, what should I use? Someone said go with a 12-32 mtn cassette, will this be enough for a fit rider on a 20lb cross bike on singletrack? Thanks for your help, I don't want to order something when it isn't what I need. Unfortunately, the local shops aren't any help. One guy tried to sell me a Cannondale with a headshok for cross racing, not to mention the bike was the wrong size.
re: Cross gearingclimbo
Aug 12, 2001 4:52 PM
Cannondale do make a CX bike with a headshok so maybe the shop was doing OK? What gearing you run depends on where you ride, what you ride, what size chainrings you run and how fit you really are. If you're going to hit singletrack with serious steep climbs the MTB cassette could be a good idea.
re: Cross gearingbadabill
Aug 12, 2001 5:52 PM
I use a 12-32 cassete with an lx rear derailer, A 105 triple with 30-40-52up front. this gives me enough gearing for the steep singletrack I like to ride. When I race depending on the course I run a 12-25 or 27 and usually dont have to shift into the little ring up front. Most hard core cross racers use a double up front with a 36-46 ring, but if you ride a lot of singletrack this is a tough gear to turn. Check out some of the online retailers on what bikes are out there. A good entry level cross bike can be had for less than $1000
re: Cross gearingJan Gerrit Klok = "TUFO-man"
Aug 12, 2001 9:54 PM
For my first races on a true crosser I am gambling on a single 42 up front plus the 12-27 I always ride in MTB-races. Here in Holland we don't have lond steep climbs, at least not on x-racecourses. As a chainguard I'm trying out the Rohloff, which was never meant for use with cassettes, but I think I got it to work anyway.
Perhaps you could try 42/29 chainrings. The 42 should give you all you need for your races, the 29 would be used when things get really steep or narrow in training.
re: Cross gearingclimbo
Aug 13, 2001 6:26 AM
nice choice, I plan to run the exact same setup. I ran a 38x17 single speed last year which was great fun. Some climbs were tough after the 10th lap but it handle most situations. Problem was the flats were too hard to keep up without a bigger gear so I am switching to a 42 ring and a 12-27 like yourself to see how it goes. I'll post a pic when I get it set-up.
FWIW...Tony D
Aug 18, 2001 6:28 AM
I use 34x46 up front (XT) and 11-30 rear (LX) with and LX rear derr...the whole thing is thrown with Shimano bar end shifters and works great.