Rear mech advise

S

samsbike

Retro Guru
Attached is the rear mech that came on my bike.
I know its campag but I have no idea which one.

The rest of the groupset is chorus.

I would like to run this mech on a 9 speed tiagra set up for commuting - so my question is will it run at least 7-8 cogs of the cassette and will it run 25 or 28 teeth?

If not, or if its not going to be a good match, what rear derailleur should I buy, bearing in mind I would like to maintain the bike period etc.

I am going to stick with the downtube friction shifters.

thanks
 

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what you have is a Campagnolo derailleur from the mid 80's being part of their budget Triomphe groupset I had one for years and found it to be durable and totally reliable in all weathers, unfortunately it's not compatible with the Shimano Tiagra 9 speed index system as it pre dates that era but will be ok for up to 7 speed friction shifting
 
Thanks. Could i use it as an interim to run 7 of the 9 cogs?

Also do all retro bikes have that sort of bend in the seat stays?
 
Hi samsbike.
I only use friction shift stuff & 5/6 speed freewheels. If this will work with those & if you're planning on not using the rear mech & would consider selling it, please PM me & I'll take it off your hands :)

Cheers

Rich
 
In short you cannot use the 7 from 9 gears as the spacing between cogs is completely different. Google Shimergo if you want to see what works, but anyhow your rear mech dates from before indexing.
 
hamster":1pgqc247 said:
In short you cannot use the 7 from 9 gears as the spacing between cogs is completely different. Google Shimergo if you want to see what works, but anyhow your rear mech dates from before indexing.
Click to expand...

Hamster, I was going to stick with friction shifting, I thought that would not make a difference as I would have to learn the spacing required. I used to friction shift when I had a british eagle, so hopefully I have not forgotten all of it

sam
 
samsbike":3uopch7z said:
hamster":3uopch7z said:
In short you cannot use the 7 from 9 gears as the spacing between cogs is completely different. Google Shimergo if you want to see what works, but anyhow your rear mech dates from before indexing.
Click to expand...

Hamster, I was going to stick with friction shifting, I thought that would not make a difference as I would have to learn the spacing required. I used to friction shift when I had a british eagle, so hopefully I have not forgotten all of it

sam
Click to expand...

Sorry, I thought you meant with the Tiagra shifters. It should be fine, provided the 9 speed chain sits happily on the jockey wheels. You could probably fit some aftermarket jockeys to convert it if necessary.
 
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