balindamood is right on the money with the falcon derailleur i just picked one up, from some advice i got from a buddy to deal with my problems ive been having i switched to a 50 39 24 in front but i run a top pull steel frame which makes it really hard to find a derailleur, i found an old falcon at a bike co-op for three bucks it works wonderfully, mind you i till need to shim it, it says 28.6 on it but i dont think its right. Its worth a try, also i packed about 55lbs on my rig and climbed the mountians here in idaho just fine with my 24/32 combo, i run 175 crank arms i dont know how much of diff that will make though