Modern indexed downtube shifters (10) on a steel frame.

Dolan Driver

Retro Newbie

Thanks. I had settled for probably getting an Ultegra 6600 rear derailleur but was keeping an eye on a very clean 7800 front and rear derailleur set that was going for a good price on ebay. Managed to get them at 6600 RD prices last night, even if I had to stay up till 3am to secure it with a late bid. :facepalm:

Can anyone recommend a band-on adaptor for the front braze-on derailleur (28.6)? I see that I can get a metal mount in 28.6 from Taiwan in silver or get a current production adaptor in 34.9 and get a plastic shim for underneath. Which is better, can anyone say?

The silver one might look better on the frame! ... lsrc=aw.ds



Old School Grand Master

You buy the adaptor the correct diameter to suit the frame tube. So if 28.6 is the tube size, that's the one. Buying an oversized one and shimming it is a make-and-do bodge in my opinion. Plenty out there for about a fiver


Devout Dirtbag
Re: Re:

Dolan Driver":1rmz36es said:
Thanks for the info on the 7800 levers. I wasn't aware of them. Downtube levers certainly aren't cheap but I guess investing in decent gearing components will pay off. The frame and forks are "free" given that they languished in my shed and were destined for the scrap heap until I considered a possible restoration.

I wish the RL340 brake levers had a white hoods option but black hoods with silver levers will do.

What diameter clamp do I need for a Renyolds 531 frame for the front derailleur? It is a band-on instead of a braze-on derailleur required, I see 28.6 and 31.8 being mentioned in measurements for various derailleurs.

If I'm not wrong 28.6 (1 1/8") would be the correct size for a band on derailleur for a regular reynolds framed bike.