Sam Salt wrote:

Can anyone please tell me where I can find out how many teeth there
are on each ring of an 11-32 8-speed cassette? Numbers for just the
middle six will be fine...

Try good old Sheldon Brown here :- http://www.sheldonbrown.com/k7.html (
scroll down to gear tables )
although I can't see an 11-32 eight speed I must admit.I presume it is
Shimano ?

There's an 8-speed 11-32 in SRAMs 5.0 series. Can't find the tooth numbers
though.

Andy