Swapping cogs between Shimano Cassettes

rcrampton said:

Can I swap cogs between various Shimano cassettes? I have an 8 sp Tiagra cassette and I'd like to get a 34T cog on it. Can I mix/match among other Shimano cassettes, in particular the MTB ones. How about other brands like Campo etc?

Thanks for your help.

Yes. I've taken the rivets out of two different 9-speed HG-50 cassettes (Tiagra/Deore grade) to make my own custom cassette. One was an 11/32 MBT and the other was 12/25 road. Worked pretty well actually. Some of the ramps don't line up perfectly but it hasn't caused any shifting problems.

I wouldn't recommend swapping around 8 speed cogs with 9 speed cogs. Their thicknesses are slightly different.

I don't know about using Shimano and Campy cogs interchangably. It may work it may not I don't know. It's not an option I would entertain though.

A 34t cog may not clear the rear derailleur unless it's an MTB. If it's a road der the larges you will probably be able to use successfully is a 27 or 28.

Doctor Morbius said:

I don't know about using Shimano and Campy cogs interchangably. It may work it may not I don't know.

It's no go,square peg in round hole type senario.

I have used Sram and Shimano cogs individually on my race rigs for years. It allows a lot more variability in gearing than stock, not to mention much more thorough maintenance.
I have not dealt with campy so I will not venture on that one.