pletcgm
07-27-04, 03:29 PM
If I put an 11-23 on my 700c bike, would there be a considerable difference that I would notice? I am riding my 650c bike with an 11-23 with no problems, even on steep climbs. Both bikes have 39-53 chainrings.
Road Cycling - 11-23 on 650c vs. 11-23 on 700c
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1oldRoadie
07-27-04, 04:09 PM
650 to 700 is about a gear........39 chainring to a 42
Gonzo Bob
07-27-04, 04:47 PM
If I put an 11-23 on my 700c bike, would there be a considerable difference that I would notice? I am riding my 650c bike with an 11-23 with no problems, even on steep climbs. Both bikes have 39-53 chainrings.
Well, it depends on your exact tire sizes, but a 700C wheel is about 8% larger than a 650C wheel so to get a similar low gear with the same chain rings, you need to use a cog that is ~8% larger.
700C with 39x53 and 12-25 gives a gear range of 3.3m - 9.3m
650C with 39x53 and 11-23 gives a gear range of 3.3m - 9.4m
Well, it depends on your exact tire sizes, but a 700C wheel is about 8% larger than a 650C wheel so to get a similar low gear with the same chain rings, you need to use a cog that is ~8% larger.
700C with 39x53 and 12-25 gives a gear range of 3.3m - 9.3m
650C with 39x53 and 11-23 gives a gear range of 3.3m - 9.4m