I am looking at fitting an Alfine or Rohloff hub on my rig. What is the largest chainring acceptable on the rig without the chainring hitting the chainstays? Right now I am running a shimano octolink 109.5mm spindle length bottom bracket and can clear a 34 tooth chainring. Does anybody know how many teeth I would be able to gain on the chainring if I went to the 118.5mm spindle length bottom bracket?