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Replacing Drivetrain

789 Views 5 Replies 4 Participants Last post by Photo-John, Jul 14, 2006

Photo-John

Discussion Starter · Jul 13, 2006

I broke my chain in the middle of a ride, recently. I knew it was worn out so I had it coming. So I bought a new chainring (Salsa 34 tooth) and a new KMC BMX chain. The new chain seems much bigger than the broken KMC chain. Am I going to have a problem with the BMX chain? Am I confused (definitely) about my old chain, which I thought was a BMX chain? What should I do, oh wise ones?

I guess I also need to replace either my White Industries freewheel or the cog. Anyone know anything about that? I'm guessing replacing just the cog means ordering and waiting. So I'm leaning towards just buying a whole new freewheel. Plus, then I have extry parts.

Thoughts?

And here's a photo from the ride where I broke my chain - City Creek in SLC. Broke it after most of the climbing and had a boss (bring back that word) pumptrack ride down one of the flowy-est downhill trails ever. I was actually kinda glad I broke the chain cause it was so fun pumping and carrying speed.

Thanks to Chris Ray for the photo!

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SSteve F

· #2 · Jul 13, 2006

KMC make bmx chains in three different widths....3/16", 3/32" and 1/8. Not sure about the Salsa width, but probably for a 8/9 speed. If you got the 1/8 chain, it is probably the reason why it appears big.

If you are changing the chain/chainring, you should definately do the rear cog at the same time. I wouldn't put too many miles on that new chain with a worn rear, as it accelerate the wear in the chain.

Bummer about the break, but glad you made the most of it.

http://home.earthlink.net/~kmcchain/english/index.html

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Photo-John

Discussion Starter · #3 · Jul 14, 2006

Thanks for the help, Steve. I already got a new freewheel. I don't need to worry about anything with the beefy chain do I? It's not going to wear faster or cause any problems because it's a little wider?

Thanks-

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shiggy

· #4 · Jul 14, 2006

Photo-John said:
Thanks for the help, Steve. I already got a new freewheel. I don't need to worry about anything with the beefy chain do I? It's not going to wear faster or cause any problems because it's a little wider?

Thanks-

Not a problem to use 1/8" chains on 3/32" cogs/rings.

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totally_fixxated

· #5 · Jul 14, 2006

Photo-John said:
I guess I also need to replace either my White Industries freewheel or the cog. Anyone know anything about that? I'm guessing replacing just the cog means ordering and waiting. So I'm leaning towards just buying a whole new freewheel. Plus, then I have extry parts.
Thoughts?

I would check rear cog for wear first before replacing it. Steel rear cogs tend to wear less
(especially larger sizes) than front chainrings and chain.

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Photo-John

Discussion Starter · #6 · Jul 14, 2006

Over a Year Old

totally_fixxated said:
I would check rear cog for wear first before replacing it. Steel rear cogs tend to wear less
(especially larger sizes) than front chainrings and chain.

Yeah. I gave it a shot. But it's a popin. It's over a year old with plenty of wet rides on it and the chain's been wasted for a while. So I got a new freewheel. I'll use the old one for parts.

Thanks!

John

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Replacing Drivetrain

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