Tried to fit some of these last night. What a fookin palaver!
The 20mm one (the one I really needed)was a bit tight going onto the Bomber steerer so I tried giving it some assistance, then a bit more, then a bit more... then it stopped all together - well & truly jammed on. Needed the bike this morning so had to chisel the thing off! What a pile of cack, they only had to get one hole right afterall.
Only wanted them for cosmetic reasons to replace the odd selection of spacers already doing a great job - that'll teach me.
For what it's worth the 5s and 10 fit great by the way...