upgrading drivechain

Josh said:

Hey all,
I'd like to convery my rear crankset from a 9-spd to a 10-spd and
change the (stock) ratio.
Clearly I need a new casette, chain and rear derailler. Do I need a
new shifter or can mine be modified to work? Also, Do I need a new
front derailler (if I do coule someone explain why?)

Anything else I haven't thought of?

If you mean you want to convert your rear CASSETTE from 9 spd to 10spd,
what kind of shifters do you have? IF you have Campy Ergo levers, then
YES, assuming you have the newer *rounded* hood levers, you can modify
the it to make it 10 speed.

IF you have the older "pointy" hood Ergo levers that originally came as
8 speed or early 9 speed, then the answer is NO.

Here's a pic of the difference in hoods:

http://tinyurl.com/kzy3y

If you have Shimano STI levers, forget it, you'll need to buy new
shifters too.

Josh said:

Hey all,
I'd like to convery my rear crankset from a 9-spd to a 10-spd and
change the (stock) ratio.
Clearly I need a new casette, chain and rear derailler.

"Clearly" you need a new rear derailleur? My vision has always been
fairly opaque. Which is probably why my 10 speed Record levers seem to
shift my 9 speed Centaur medium cage rear derailleur over a 10 speed
cassette just fine. But I think you should follow your clear vision
and buy a new rear derailleur that says 10 speed on it. Its good to
keep bike component companies in business. They don't stay in business
if everyone keeps on using old stuff.

Exactly what is a "rear crankset"? Do you have some sort of odd
recumbent that is using two cranksets to get hundreds of gears? My
bikes have only one crankset. Its in the middle of the bike. No rear
or front to it.

Do I need a

Quoted message said:

new shifter or can mine be modified to work? Also, Do I need a new
front derailler (if I do coule someone explain why?)

Anything else I haven't thought of?

Thanx a lot,
Josh