Can an Alfine 11 replace a Nexus 8? An online store currently offers the Dahon Curve XL with a Shimano Nexus 8 IGH (The Dahon site shows the Nexus 7 model).

I'd like to replace it with an Alfine 11.

Does someone know if the OLD (Over Locknut Distance) is the same, and whether it could be an easy replacement?
http://www.sheldonbrown.com/nexus-mech.html

Thank you.
As @Kibbee has stated the IGHs do have a different OLD, although Nexus hubs can be spaced out to 135mm with spacers/ bolts/ washers.

You need to measure the Dahon's rear dropout spacing.

I can't find anything to suggest otherwise so I assume it's 132mm, in line with other commuter type bikes.

The limiting factor is dropout spacing. The Dahon is an aluminum frame with short chainstays. Both of these essentially prevent the ability to spread the dropouts and force a wider hub in. Aluminum is brittle and not malleable like steel, it doesn't like being bent.

You may damage your frame and void the warranty.