Originally Posted by
HillRider
The Shimano method works but assumes you are within their published tooth differences and total teeth ranges for the rear derailleur, chainrings and cassette. If you take any liberties with these recommendations, the chain maybe too short.
Conversely, it may be too long. No method can accommodate a wrongly sized dérailleur. The Shimano method at least centers the arm range to minimize the effects at either end.
__________________
Stupidity got us into this mess - why can't it get us out?
- Will Rogers