Originally Posted by
K6-III
The X-RK3 disc hub has 163mm over-locknut spacing and is unsuitable for most frames.
Yep, it's the
S-RK3 three speed disc hub that has the 120mm OLD. Alas, it also seems to be a theoretical product.
There's always the AB3 three speed hub, with its big 90mm
drum brake, and the alloy shelled X-RD3 with a 70mm drum brake. Both of these
are available.
tcs