I recently purchased a Frey EX Pro and was wondering if anyone who with the same bike has increased the Crankring size from 40T to a larger teeth size. What would be the maximum size that would be able to fit on this frame? I use the bike for mostly commuting (overkill) and was hoping to decrease my cadence. It seems I'm spinning too much and would also like to not always be in the smallest cog in the freewheel. Would a 50T wolftooth fit?