Zajímací, takhle mě o tom nenapadlo přemejšlet:
kombinace převodů vs. opotřebování pneumatik při skidech
Skid Stops and Tire Wear
44/16 simplifies to 11/4, so there would be 4 skid patches.
45/15 simplifies to 3/1 so there would only be 1 skid patch.
42/15 simplifies to 14/5, so there would be 5 skid patches.
43/15 can't be further simplified, so there would be 15 skid. patches.
This is based on the assumption that you always skid with the same foot forward.
from Sheldon Brown
http://sheldonbrown.com/fixed.html