I"ve worn out a lot of chains in the last 3 years, 15,000 + miles on dirt roads. I used ONE KMC chain that was very cheap, i think it cost around $9. Reason i bought it was becaue everybody says there is NO difference. Well about 700 miles into it, the chain was COMPLETELY hosed. I put the chain checker on it and the tool about dropped through to the floor. (exageration) Actually it was the most worn chain i've ever seen or ever used, despite the fact that i've used many chains for twice that distance.

I'll never use another cheap chain like that. I now use SRAM chains. The PC 58s is my normal chain. I've tried the 48's as well but am convinced that the bike shifts better and the chain sounds "better" with the 58.