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What Gears(11 posts)

What Gearssuperdreadnought
Jun 17, 2003 8:36 AM
When I build my CX bike later this summer what gears should I get for in MI? I am thinking a 48/38, with a 12x27 9-speed in the rear. But what about a 46 on the front? What do some of you folks run? This will be my first CX bike and first year riding/racing.
re: What Gearsatpjunkie
Jun 17, 2003 8:59 AM
48/38 is the standard. If the bike is for pure race a 46 or 44 may be okay. It was quite rare that I used the 48/12 gear in any race last season as there just weren't many hammer sections. A tighter gap between rings means a tighter chain so less chance of dropping in a race. I run MTB cranks and have a 48/36 on both which will soon be 46/36 on one. I'm a bigger rider and appreciate lower gears so I can still 'spin' a bit.
re: What Gearsheldveld
Jun 17, 2003 12:49 PM
Get a triple on the front and you will be all set. I know its not "cross" but, the functionality of your bike is so much greater. Bigger gears for road riding and smaller for trails. Unless your a top level racer the weight won't make a difference either.

What part of Michigan do you live in, I'm on the 'West Coast'.
I'll second thatD_man
Jun 17, 2003 1:22 PM
I just forked out a good chunk of change for a complete CX bike from speedgoat and if I had it to do over again, I definitely would have gone with a triple setup! Call me a wimp, but there are times on long rides w/ lots of climbing that I need a granny!

I have at least swapped out my ultegra cassette for an XT cassette. That's been a major improvement for me off-road.
other double optionsatpjunkie
Jun 17, 2003 2:22 PM
use a 48/36 or 46/34 crank with a 11 or 12-34 cassette. this will give you close to the same basic ratio as a 30 (road triple front)
27 (road rear). if you use a mtb crank you can go 26 front to 27 back.
other double optionsOffRoadTourer
Jun 17, 2003 6:36 PM
Or use a triple and a 11-34 cassette and climb walls! I do.
re: What Gearsdpb
Jun 18, 2003 6:18 AM
I have to play devils advocate here. You might not want the triple...personally, I started on a 42/52 crackset with an 11-27 casette. I was doing okay, kind of mashing the gears on the uphills, but I was keeping up with the big guys. Probably not the best for the knees, but it definately made me a better rider (picking lines, probably strength).

I recently moved to 38-48. I find this setup pretty great. I have never caught myself desperate for a lower gear, although I have spun out a few times on the 48 on the road.

I like less weight and the simple nature of the double.

Just my opinion,
Damian
similarSteve_O
Jun 18, 2003 9:18 AM
I just swapped out an MTB drivetrain (44/32/22F x 11/32R) with a more traditional CX drivetrain (48/38F x 12/27R). While I have lost some low end it has strengthen me up by pushing the higher gears. I also got a better chainline and less cross-chaining chatter.

If I were to race and wanted more low end I still have my old 11/32 cassette which I can put on...
re: What GearsFarmpunker
Jun 18, 2003 12:03 PM
I started out with a triple and a 12-17. I found that I was wimping out and using the granny too much during races. When I built my new bike over the winter I wanted to go with a double. I figured a double would shift faster and would shift well longer than a triple, as well as forcing me to push bigger gears in training and races. I found a RaceFace mountain triple and have my bike set up as a double, 46-34, with the same 12-27 casette. It's a little low for road riding. I've only taken this ride off road a couple times (new bike, fear of dirt, crashes)but it feels good. Note, I'm not a very powerful rider, so lower gearing suits me better.
re: What Gearssuperdreadnought
Jun 18, 2003 5:52 PM
Cool, thanks for the info. Ture to form, people have all kinds of differnt setups. I think I might try a 48/36, I can always change it. What do chain rings run? Not that much I would think.
re: What Gearsatpjunkie
Jun 19, 2003 11:43 AM
rings run between 25-45 usually, easy to experiment, good luck!