Help with campagnolo cassette
 

http://i1341.photobucket.com/albums/...smogix6o5.jpeg

New to campagnolo. I have a 10 speed freehub. I bought what I thought was a ten speed cassette, but the 21, 23 and 25 toothed gears have the spline pattern on the bottom that won't fit on the hub. The rest of the gears have the pattern on the top and work fine. What am I missing? Is the hub or cassette wrong? Or am I just crazy????


Many thanks for any help.

That matches my Veloce 10-speed cassette.

Notice the notched tab at the 4 o'clock position in your photo. That has to go on the matching spline on the hub. Just like the one at 3 o'clock on the smaller cog.

(I was surprised that mine looked like that, I didn't remember the extra tabs on the larger cogs.)

10-speed spacers
There are 3 thicknesses of spacers for Veloce, which has 10 loose cogs. (Some other Campagnolo cassettes have some cogs combined onto carriers.)
Numbering from the largest cog,
between 1 & 2, spacer is labeled 1.6mm
between 4 & 5, the colored spacer (usually blue or amber), is 2.55mm.
the other black spacers with "ears" are labeled 2.4mm
6&7 and 7&8 and 8&9 are round spacers with no ears for these smaller cogs.
the (smallest) 10 cog is self-spacing.

http://i1341.photobucket.com/albums/...pswsxhqh1d.png

It's a DT Swiss freehub. The issue is where I have pointed to in red. The extra table are squared off and won't fit into the scooped slots. Just fix it with a file? Anyone else ever have to do this?

The 4 driving splines are those at 90° angles to the stepped one at 3 o'clock in your photo. The other 4 normally engage air and so don't matter. Carefully file the corners of those so they clear your freehub body's curved gullies.

Huh. I've never seen a hub with curved cuts like that.

I guess they only tested it with the more expensive cassettes that use carriers. (But I liked my loose Veloce cogs, easy to clean.)
http://en.hollandbikeshop.com/images/675533.jpg

I'm confused. If the wheels are new, and the cassette is standard Campy brand, why don't you ask the wheel supplier how the cassette is supposed to fit? If it was sold to you as a Campy compatible wheelset, why not take the supplier to task on that claim? And what does "spline pattern on the top" or bottom mean? What is the top and bottom of a cog.

Look at the photo.

There are two sprockets with 2 different patterns. One is above (on top) the other.

Oh, the bottom picture, not the bottom of the cog. Doh!

Just took the teensiest bit of filing on three of the tabs and slipped right on easily. Thanks so much for the help.