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Chain rub(5 posts)

Chain rubAztecs
Oct 15, 2001 2:59 AM
I am experiencing chain rub with my on one of my gears. I have a double and this occurs when I am in the small chain ring/smallest cog combination. What do I adjust.

Newbie
My understanding is...PsyDoc
Oct 15, 2001 3:24 AM
...that chain rub in this situation is normal as the chain is angled enough in this situation that I think the only adjustment that can be made to remedy the rubbing is to shift into the big chainring and find an equivalent gear. I could be wrong, though; perhaps others can offer additional suggestions. Depending on your cassette gearing (e.g., 12 x 21), you may have redundancy in your gears. For example, 53/19 is redundant with 39/14 if you have a 12 x 21 cassette. Check out the gear tables at http://www.bsn.com/cycling/
You are absolutly right. don't use that gear. (nm)vanzutas
Oct 15, 2001 7:13 AM
Avoid chain crossing at all costs...Cima Coppi
Oct 15, 2001 5:42 AM
This means do not use the small chainring/smallest cog combo or the big chainring/largest cog combonations. This puts too much angle on the chain that will result in premature chain wear and tooth wear on the cogs and chainrings.

CC
ExceptTrent S
Oct 15, 2001 9:21 AM
when you're racing many often ignore this to not have to move to the small front ring. Saves time on short hills but does make for more wear on the drivetrain.