Simplex Retrofriction were a common upgrade from Campag record in the early 70s due to smoother and lighter action (true as well, not a myth) although to keep sponsors happy in the pro ranks they often disguised it by using the rubber Campag covers
Sounds like we are returning to 80s tourers ( Claude Butler Majestics , Holdsworths etc) with double chainsets. The standard issue back then was an SR 50/32 up front with a 30/32 5 speed on the back.
Simplex Retrofriction were a common upgrade from Campag record in the early 70s due to smoother and lighter action (true as well, not a myth) although to keep sponsors happy in the pro ranks they often disguised it by using the rubber Campag covers