Originally Posted by I_bRAD
Only time I use my cable-pull tool is on the front derailer. Its usually fussy to get a good angle and I'm not sure it's even worth the trouble.
Agreed.
Originally Posted by I_bRAD
How much of a difference in chainline can I have between front and rear on a fixed without problems?
Well there are a few factors here one would depend on the width of the chainring and cog 1/8 or 3/32.
If you are running 1/8 chain ring and 3/32 cog you will be able to get away with a bit more, if running 1/8 and 1/8 then a bit lesss, and 3/32 3/32 the chains usually have a bit more flex so you have a bit more tollerance.
Another factor is how tight your chain is, a loose chain is more accepting of a chain line that is a bit off. You never want it too loose though.
Usually if there is a chain line problem you can hear and or feel it.
I'd say keep it within 3-5mm.