Alfine Hub Schematic

The first place you should look is Shimano's web site. Crazy, right?
http://bike.shimano.com/publish/con...ts/0/alfine/product.-code-SG-S500.-type-.html

42mm.

You're going to have to have a theoretical 165mm spaced rear (or an actual 165mm) with offset stays like the Pugsley to pull it off.

HA! I looked at all the drawings on the website but overlooked the obvious! Thanks.

Can an Alfine hub be spaced to 165mm?

Need a source for the axle, stock one isn't long enough for much over 135mm. Not sure how specific the axle is to Alfine. Some IGH have non-standard axles.

pursuiter said:

Need a source for the axle, stock one isn't long enough for much over 135mm. Not sure how specific the axle is to Alfine. Some IGH have non-standard axles.

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Yes, that's why I'm asking.

Please disregard my question - wouldn't work right... chainline or brake mount would be really jacked. Duh.


Move along, nothing to see here.

in the diagram they show only:
Hub Axle Unit (Axle Length 187mm)

It's an assembly with sun gears on it, I suspect it is a specific IGH axle, that's why it needs special washers to prevent rotation.

Margaritaman said:

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

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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.

Mark

bikeny said:

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....

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For Alfine/Nexus it's a 2mm dished cog centered around 45mm, flip it in, CL=43mm, flip it out, CL=47mm. If you could find a non-dished cog, the chainline would be 45mm.