Rivets/spacers on cassettes (was a misguided question about parallel drop-outs)

[mzjo]

This is a 7 speed cassette on an 8 speed freehub.

I have now found some old spacers with cut outs/bends to accommodate the rivet heads. They are narrower than the one I was using, but putting two together seems to do the trick. There's still some wonk in the sprockets, but nothing the floating jockey wheel can't handle.

(The spacer I had been using had no cut outs, which was causing the problem.)

But just putting 2 rivets in seems daft. Presumably saves a tiny amount of money 

The only spacer that I have ever bought for that specific application (7sp cassette on 8sp freehub) does indeed have three little cut-outs. I never stopped to pose the question "why?" I might still be able to find it in the junk in the garage! I don't think it was an official Shimano spacer though, more likely something after-market.

[Paul]

Ooh. Is it now going spare, mzjo?

[mzjo]

Ooh. Is it now going spare, mzjo?

I really wasn't planning to get rid of it (it's the sort of thing that stays in a box for years then, the day after you pass it on to someone else is the day you find you need it and a replacement is impossible to find!).

However, thinking back I think it was a Halo one and a bit of searching tonight has thrown up this https://www.halowheels.com/shop/spares/hub-spares/7-speed-cassette-spacer/ (amongst others with either little studs on the inside or little holes, presumably to accomodate rivets). I didn't get mine through the Halo shop and it was just plain silver anodised but it was over a decade ago!

I note that SJS stock the Wheels one which is just a plain spacer with no provision for the rivets and is also quite pricey for what it is (like a good bit of the unusual bits and pieces stocked by SJS)

[Feanor]

I note that SJS stock the Wheels one which is just a plain spacer with no provision for the rivets and is also quite pricey for what it is (like a good bit of the unusual bits and pieces stocked by SJS)

They also stock the Jtec one with the cutouts, that I linked earlier for £2.99...

[Paul]

Indeed. And in reply to my enquiry SJSC pointed me to the same one. I’m just a bit peeved that the postage is more than the spacer and - had I known I was going to need it - I could have added it to the original order.
Anyway, my running repair is good enough until I have a larger order for SJSC.

Ooh. Is it now going spare, mzjo?

I really wasn't planning to get rid of it (it's the sort of thing that stays in a box for years then, the day after you pass it on to someone else is the day you find you need it and a replacement is impossible to find!).

We think alike.

[mzjo]

Indeed. And in reply to my enquiry SJSC pointed me to the same one. I’m just a bit peeved that the postage is more than the spacer and - had I known I was going to need it - I could have added it to the original order.
Anyway, my running repair is good enough until I have a larger order for SJSC.

Ooh. Is it now going spare, mzjo?

I really wasn't planning to get rid of it (it's the sort of thing that stays in a box for years then, the day after you pass it on to someone else is the day you find you need it and a replacement is impossible to find!).

We think alike.

I found it this morning in passing in the garage. It's doing duty as a spacer on a ss conversion on a 26" wheel hanging from a nail!