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anyone use an alum alloy cog?(5 posts)

anyone use an alum alloy cog?DougSloan
Jan 13, 2004 2:38 PM
I see you can get an aluminum alloy cog made by EAI from Business Cycles ( ). Anyone use one? How would this hold up with a 1/8" chain?

why would you pay extra for an alu alloy cog, being thatgspot
Jan 13, 2004 3:03 PM
alu wears out much faster? to save a few grams? ha. I laugh at that, on a fixie.
Is it worth it? really? in the end?
racin nmDougSloan
Jan 13, 2004 3:14 PM
racin nmrcmann
Jan 13, 2004 3:42 PM
They'd certainly wear better than alloy 3/32" cogs, but it still seems a bit of a stretch that you'd really gain anything by losing a few grams of non-rotating weight (ok, it rotates, but you know what I mean...) and it would wear much faster than steel. I'm sure a lot of the sponsored guys use them, much as the sponsored pro road teams use Al/Ti cassettes, but they usually don't pay for them. The good news is if you raced with your wallet it would be lighter if you bought the cog!
Check this out..joe friday
Jan 13, 2004 4:27 PM
all these parts were put on new and have prolly 400 miles
on 'em-- of the three, the alloy cog (zeus 19t) shows the least wear. it's got a grey rough texture, so maybe it's hard annodized? Anyway, i've read great things about the EAI
cogs, but because of minute chainline differences, i'm going to use a steel Dura-Ace cog for a bump up in gearing.