610
01-02-06, 10:26 PM
inquiring mind want to know!
Cyclocross - Why do some CX bikes run a single ring in front?
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Merckx Rider
01-03-06, 05:19 AM
Many cx courses don't require the use of a large chainring, using a sinlge ring (with guards) saves a little weight and is one less part of the drivetrain to get fouled up with mud. Most riders use a mid size ring like a 42 this way they can get both some speed and climb.
greybeard87
01-03-06, 06:31 AM
Simplicity = improved reliability.... hopefully
lunacycle
01-03-06, 08:30 AM
Also, since you have only one ring, you can shorten your chain. This reduces the likelihood of dropping your chain, assuming you're using some form of a chainguard / chainkeeper up front. I've been running a 38t x 12-28 combination for years, in conjunction with a DA short-cage rear derailleur, and I have never dropped a chain.
ronbridal
01-03-06, 12:15 PM
I ran a 42 tooth chainring with a 12-27 cassette in the back. This gave me all the gears I needed for the courses I raced on. In addition, I didn't drop a chain in any race because I used a chain guard on each side of the chain. I am changing bikes for next year though, and may run a double up front, I am undecided. Ron
Lectron
01-03-06, 12:27 PM
Single 42 with a ten speed 11-28. Saves weight, gives me all the gears I need.
If anything should demand lighter gears than 42-28, I would probably be shouldering the bike anyway.
If anything should demand lighter gears than 42-28, I would probably be shouldering the bike anyway.
jaqb
01-03-06, 03:46 PM
Lectorn has right, in my winter bike cyclocros EMPELLA i've 42 and 11-28, those gears are best for me too training and competiton.
Simply and lightnes quick shift and no problems.
Simply and lightnes quick shift and no problems.
Ronsonic
01-04-06, 11:30 PM
Simpler, lighter, cheaper, sturdier - how often do you get all that at once.
Why carry more parts around than you need. Most cross courses don't have long enough paved sections to do a lot with the big ring and if you need a granny gear you'd go faster running so why have the extra stuff on your bike.
Ron
Why carry more parts around than you need. Most cross courses don't have long enough paved sections to do a lot with the big ring and if you need a granny gear you'd go faster running so why have the extra stuff on your bike.
Ron