Originally Posted by
jnbrown
Because with such a big differential between the 26/39 rings the chain will rub against the inside of the 39 when using the 26 with the smaller (rightmost cogs) in the back. I assume "top" means smaller or else I misunderstood.
Ok - definitely misunderstood. When you said top - I figured you meant to the top of the cluster - not gear range. Thought it was odd. I have the same issue with my compact crank in the small ring - rubs the outer when in the last two gears.