I've got an old wheel with a 5-bolt Hope hub on a Mavic 321 rim. I just noticed that the QR bit unscrews leaving a big hole right through, so it looks like it could be used with a 20mm bolt-through adaptor. Given I've just got a set of 20mm bolt through Pikes it'd be useful having this as a spare wheel, so could anyone point me in the direction of whatever adaptor I need to buy?
I had a look at the Hope site and they had a diagram for the Bulb hub that looks very similar to my one (including the QR adaptor that screws into it), except that was 6-bolt and mine is 5.

