Originally Posted by
DaveM
Got a 7 spd cassette today, I put a 4.5mm spacer on the hub, took the bolts out of the cassette and fitted it on to the hub (all the spacers went on correctly) and tightened it up, unfortunately the cassette was a little bit loose (is this normal when the bolts are taken out?)
If it's still loose with the spacer installed I'd add an additional 1/2mm or 1mm spacer all behind the big cog.
Since the lockring is designed to work with a serrated small cog, I'm not sure how well it's going to stay tight with the spacer there. You may have some chain line and derailleur adjustment issues too.