Hi,
Is there such a thing? 8 speed screw on block?
I'm converting a lovely old Concorde for a friend to early 8sp Record Ergos (to make it more user friendly but still fairly period).
Or do I need to just run with a 7sp block and have a 'spare' click on the changer?
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Might struggle a bit to find a Campag-friendly one, too - those that are still on the market (e.g. Zenith) tend to suit Shimano and later Sachs-Huret set-ups.
They are pretty close, actually: Campag is 5.0mm spacing, Shimano is 4.8mm. Sachs used to be identical to Campag, but their screw-on blocks made after 1998 went over to the Shimano standard. For 8, 9 and 10 speed set-ups, in every instance the Shimano spacing is about 0.2mm closer together. Doesn't sound much but potentially adds up to an indexing headache across the full range of a block. If you're on friction levers, mind, anything goes!
Based on that the OP should be OK with their suggestion of using 8sp Ergo levers and losing a "click" - there are Regina indexed 7sp freewheels to suit Campag Syncro transmissions doing the rounds on eBay, or if not a modern Shimano or Zenith product ought to suit too.
8 speed freewheels are used these days on BionX driven E-bikes (as those by Trek) and probably some others.
Unfortunately the gearing is MTB like 13-32, which would not work well with older Campagnolo derailleurs. Quality is not great either.
I might have an old Regina 8-speed freewheel somewhere in road gearing.