Anyone have or know where to locate a drawing/schematic of an Alfine hube that has measurements? I'm deep into a cruiser project and want to use an Alfine IGH, my issue is the rear tire is 4.25 inches wide so I'm looking at chain/tire clearance. At the very least if someone can tell me the chainline measurement from center that would be stellar. Thanks
Also keep in mind that some of the IGH cogs are dished, so they can be run dished in or out. I believe they are dished 3.1mm. So if the 42mm chainline is correct, with the cog dished outwards, you would get a 45.1mm chainline. Still not enough to clear a 4.25" tire though!
How wide is a chain, like 10mm? So the inside of the chain would be at about 40mm. So it looks to me like in standard form it would clear about a 3" tire. I have seen pictures of Alfine hubs on Pugsleys, which use a 3.7" tire. But of course the Pugsley uses some funkey offset chain/seatstay design. That might be a good place to start looking if you are doing a custom frame. Otherwise it looks like you will limited to a 3" tire.