Does anyone know, with absolute certainty, if the 2011 Shimano 105 compact crank is compatible with compact Q-Rings other than the 50T OCP3 Shimano-specific ring required by all earlier models?
Yes, I know a 105 component may not seem worthy of being installed onto a nice TT bike, but it’s actually lighter and stiffer than both the stock FSA Gossamer (by 184g) and the Ultegra SL compact crank I bought. The Ultegra SL, however, isn’t compatible with my compact Q-Rings and I’m switching to shorter cranks so I need to know. Thanks.