J
James
Guest
I have a 4-yr old road bike with a 9spd Tiagra triple. I only use the
bike for commuting on a flat route. The crankset weighs a ton, and I
carry that weight for nothing. No hills, not much need to shift the
front gears. I was thinking of going with a single chainring and
removing the front dérailleur. That would lighten the bike by almost a
pound and make the bike simpler (more reliable), while still leaving
me with 9 gears to choose from.
I'm considering the Sugino RD-48, a 48-tooth single speed crankset.
One vendor says it's supposed to use a 110mm road BB or a 103mm track
BB.
My existing BB is a Tiagra BB-7418AL square taper 68x113. Will the
RD-48 square taper hole and the BB spindle match up? Also, what about
the 110mm crank spec vs. the 113mm BB length -- does that 3mm
difference matter?
bike for commuting on a flat route. The crankset weighs a ton, and I
carry that weight for nothing. No hills, not much need to shift the
front gears. I was thinking of going with a single chainring and
removing the front dérailleur. That would lighten the bike by almost a
pound and make the bike simpler (more reliable), while still leaving
me with 9 gears to choose from.
I'm considering the Sugino RD-48, a 48-tooth single speed crankset.
One vendor says it's supposed to use a 110mm road BB or a 103mm track
BB.
My existing BB is a Tiagra BB-7418AL square taper 68x113. Will the
RD-48 square taper hole and the BB spindle match up? Also, what about
the 110mm crank spec vs. the 113mm BB length -- does that 3mm
difference matter?