Originally Posted by
|3iker
IIRC, to go with compact crankset, you would need to replace the BB as well. C I think the reason is the spindle is a bit longer to accommodate triple chainring. orrect me if I am mistaken here.
That is usually true. However, most compacts being sold now are integrated spindle cranks which use external bearing bottom bracket. A new bottom bracket would be needed regardless (assuming current crank is not external bearing). If it is external bearing (doubtful given the chainrings), there is a good chance of finding a compact compatible with the existing bearings.