Chuck moo wrote:
First double check that the rear mech can cope with the large cog
. I have bought from campyoldy, not the cheapest but the kit I got was brand new from the 70's and I have never heard a bad word about him. Any chance of getting a smaller chainring ?
I am running a 41 on a record chainset, so no smaller and the rear mech is super record and my homework said it should shift upto 28 teeth
41T front and 22 rear = 50" gear, a 39T ( smallest ring on Campy ) = 47"
or 39T and 28 rear even better 37" gear which I use on all but stupid silly 20% hills where I use a compact ( 34T front )
On old 144mm BCD Record it's 41T minimum.
To the OP a 28T cog with a Super record rear mech didn't work for me. The top jockey wheel crashed into the cog as it shifted onto it and I didn't fancy risking damage to the rear mech. I know others say they run the combination OK but no amount of chain length alteration and moving the wheel to different positions in the dropouts got it working smoothly.