- Talk to me about gearing on CX bikes ( please!)
New to all this curly wurly bar stuff . Bought a Giant Revolt for a bargain price , getting on fine for commuting and winter hack duties but could do with lower gearing for steep hills . Been used to MTB gearing, chain set is Shimano R460/R350 whatever that means ? Non series Tiagra ? No idea ! C/rings are 48/34 with a 11-34 cassette . With that combo which would be better a smaller c/ring or a different cassette ? What’s the smallest c/ring I can get away with if that’s the best option ? Or is there no reason why I couldn’t just get a Deore MTB chain set ? Seems a conventional b/b .Posted 4 years agoampthillSubscriber
You can buy a 11-36 cassette, depending on how many sprockets the block has. Or maybe even 40 if you use on of those supper star things. You’ll need to ask else where about that
On my ride today I was contemplating a 28-40 MTB chainset. I’d love to know if that would work. My worry would be if you need a new front mech?
Tripling is faff as its a new left hand shifter. Plus a road triple is normally 30 on the smallest ring so not even that much gain. A treking or mtb triple would be great but again I don’t know about front mech’ implications
genreal sympathy. Hills don’t get less steep just because you don’t have drop barsPosted 4 years agomattsccmMember
Without being rude it might be worth sticking with it. That’s already way lower than normal road bikes which generally suit almost every one. Maybe adjust your style. Can’t actually be too pompous about this as my Pickenflick runs a 28 inner ring with, occasionally, the standard 11-32 cassette. Most of the time a 25 max on the back is fine and by gum I am crap at hills.Posted 4 years agocrazy-legsSubscriber
1:1 ratio should be fine for pretty much anything, even off road hills. The climbing position is more efficient on a CX than an MTB. Give it time.
About the only other option is to go to a 12-36 cassette if the mech will stretch to that.
FWIW I run 34/48 chainset with a 12-36 cassette when the bike is in Three Peaks CX mode, I tend to revert to an 11-28 the rest of the year.Posted 4 years agoBadlyWiredDogSubscriber
Are your tyres really draggy? I’m running a standard compact up front with with 11-32 at the back and it’s fine for anything round here in the Peak and I’m a pretty average climber tbh, I found 11-25 a bit brutal off road.
Maybe you just need to get used to it? It won’t be geared as low as a mountain bike because it doesn’t really need to be, but I guess if you’re used to spinning really low gears, it might feel stiff at first.Posted 4 years agoampthillSubscriber
So can he, or I use a 28×40 MTB chainset on a road bike
I know you don’t need a gear that low but what about those that do
I’m not quite sure why if gears of less than 34×34 aren’t needed as its as quick to walk why touring bikes and mountain bikes go down as low as 22×34 or why people buy 40 teeth sprockets to run with 32 front rings.
Its interesting that Burti was using 30×34 in the Giro. He is a touch lighter and more powerful than me. Surprised he didn’t just get off and walkPosted 4 years ago
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