Dura-Ace 7800/7900 Cassette Aggro

I am the god of hell fire
Posts: 326
Hi
I have a 7800 12-25 cassette on a set of Fulcrums
Its fitted with the small spacer that came with the wheels and has run fine for a season
I have a new bike on Ksyriums with a 7900 11-28 cassette
Its mounted with a thicker spacer than comes with the Fulcrums
Id like to use the new cassette with my old wheels on the new bike
But when I put the new cassette on the Fulcrums, with the Fulcrum slim spacer, it fouls and I cant get the lock ring on to bite
Im sure Im not doing anything stupid
Ive even measured the cassettes and they are the same width
What am I missing anyone?
Cheers
I have a 7800 12-25 cassette on a set of Fulcrums
Its fitted with the small spacer that came with the wheels and has run fine for a season
I have a new bike on Ksyriums with a 7900 11-28 cassette
Its mounted with a thicker spacer than comes with the Fulcrums
Id like to use the new cassette with my old wheels on the new bike
But when I put the new cassette on the Fulcrums, with the Fulcrum slim spacer, it fouls and I cant get the lock ring on to bite
Im sure Im not doing anything stupid
Ive even measured the cassettes and they are the same width

What am I missing anyone?
Cheers
0
Comments
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if u pop the cassette on the fulcrums and dont but the spacer on, does it fit then??? if it does up with no play in cassette then should be fine. might need a little play to get shifting right though.0
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Impatient man gets new bike
Enthusiasm takes over
Ive just tried again after dark when theres no chance of riding tonight
It fits fine
Im not sure where I went wrong - just impetuousness
Cheers0 -
its ok... we've all been there. all that expensive carbon fibre calling you and tempting you....
i'm sure we can all forgive you.0