Am I correct in setting the chain length to my largest chain-ring/cog combo with the axial as far forward as possible? Then when I switch to a smaller chain-ring I won't be chain length limited?

BTW, what is a standard "warm-up" and/or "beginning of the season" gear-inch for a 330m track?


Thanks in advance.

Yes. the chains moves 3.14mm back when you are using1 teeth less than the former.

I use 17T now, and if I changes to 20T the axle moves forward 3*3.14mm = 9.42 mm

if you changes from 48:17 to e.g. 49:16, the axles would not be moved.

Not entirely true. Because the diameters are changing the angle of the chain, the axle would move forward slightly. It's not a huge movement when the difference is one tooth, but if it's 3 teeth or more, then you start to move fairly significantly.

Not entirely true. Because the diameters are changing the angle of the chain, the axle would move forward slightly. It's not a huge movement when the difference is one tooth, but if it's 3 teeth or more, then you start to move fairly significantly.huh?..

I've never had my axle move forward with reduction in either chainring or cog size.

it is partly correct, but the change is ~1 mm or less.
I experienced the same with cogs > 4teeth, but it did not gave me any problem.

Hmm....that's interesting. The more I think about it I can imagine the chain angle having some effect. Can some one give an example of the axle moving forward with a one tooth reduction in cog size? Which set of ring/cog combo will do this? I'm really curious. Thanks.