Originally Posted by
irclean
You might want to contact Gates directly at
carbondrive@gates.com. I did and, as I mentioned above, the response was postive. I think the more stories that they hear about this aluminum cog failure might help to light a fire under their butts to get the steel replacements onto the market.
I just had the same failure of the Gates all-aluminum cog that's been described here by others. I have about 1000 miles on a 3-month old Civia Bryant and while pedaling up a small hill, heard a pop and thereafter couldn't power the back wheel in any gear. Checking the bike after a six mile walk back home, I had sheared the three aluminum tangs on the cog. I emailed Gates at the address above last Thursday but haven't heard anything back. Took the bike back the shop where I bought it and they're handling the repair.
Don't know why Gates and/or Civia didn't recall this part - it seems irresponsible to me. I don't know how long my bike had been in the shop before I bought it but Gates clearly has know about this issue for over a year now.