Changing a Sturmey Archer 5 speed wheel

[nfmisso]

Hi Phil;

You need an ISO 590 rim, with the same number of spoke holes as your current hub - could be 32, 36 or 40 spokes - count them.

Sun offers the CR18 in the size you need:
[broken_link]
it is a good rim. Now you just need to get the correct length spokes and build the wheel.

I have to disagree with Phil on ISO590 rims getting scarce, they are quite widely available.

References:
http://sheldonbrown.com/wheelbuild.html
http://sheldonbrown.com/tire-sizing.html#iso