I'm a bit over geared at the moment & I think I'm going to need a 34t inner but I don't really want to change my 52t outer unless I have to.
On the campy website & knowledge base the chainrings are listed in pairs 50/34 52/36 53/39 & described as '50t for 34t' but they are available individually. Does any one know if there will be any issue with using them in different combos eg 52/34? I really don't want to shell out £200 for a pair of chainrings I'll use a couple of times unless I really have to. Thanks
What about just picking up a Chorus cassette with lower gearing than your usual? Screw it on for the trip, take it off when you get home and stick it in the box until you go to the big mountains next year. I'm not familiar with UK prices but it might be cheaper than a couple of rings as well and certainly would work well. I have Record and Chorus 11 bikes that seem to work well with 11-25, 12-27 or 12-19 cassettes without adjustment. I did 12 days in the Alps last year with a 34-29 as my low gear and I'm old and fat (64, 85 kg).
Shifting is fantastic (im on a 35/52 on the hack bike).
hand it down to the winter bike when you're back.
other alternative is go to a cassette with a 29 on it, although i've ridden alps/ dolomites numerous times with 39/25 as bottom gear and been fine..
c50jim wrote:I think the 52/36 combo just wouldn't work very well. The jump is huge and I wonder if your front derailleur could handle it well.
This combo gives no problems whatsoever, I bought it from Campa like this. I later changed the 52T outer ring with a 50T outer ring and although it has 50-34 stamped on it, it works great with a 36T inner ring. I always understood that the front derailleur is not capable of handling a bigger drop than 52-36, so that means 52-34 won't work. Maybe somebody on this forum has tried it and he / she can chime in.
Please note that I am using a pre 2015 crankset though.
I rode some biggish (for me anyway) hills on Sunday in north west French coast and managed to climb ok but had no more gears left
If the 52/36 works out ok, I'll probably replace the standard one for ever.
What will happen is that you will have a good chain length for 52/29 and then when the chain is in 34/11 the chain will be very slack. The RD will not be able to take up the slack. If you shorten the chain so that 34/11 is good, then 52/29 will be too tight.
52/34 will probably work with 11/25 and maybe 11/27, I doubt it will work with 11/29.
Which is fast enough for long, not steep descents and also great for +20% climbs.
Before that, on my Shimano setup I had 53-39 chainset and I am kind of missing the close range between small and big chainring. So I can't even imagine how huge it will be with a 52-34 setup. I wouldn't like it for sure, even if it works properly.
But man, I'm with the previous poster that the jump between a 52 and 34 would be a huge annoyance while shifting, particularly with a large range (11/29) cassette. I don't like even a 50/34 for that reason. Find myself constantly jumping between big and small rings searching for the next appropriate gear. I haven't tried the 52/36 combo yet and was hoping that might be better in that regard. But sounds like the previous poster still misses his 53/39 for the same reason.
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