I have a 20mi loop that I've been riding for years FG and I have a log of times.
This AM I shifted the CF Merckx into the 70GI I ride fixed and set off to simulate a FG ride (yes, I get bored).

Despite 33 years of technical progress hindered by derailleur gimcracks hung uselessly for today's simulation my time was exactly in line w/ a 10 ride FG average.
Proving nothing except it's difficult to be 100% concentrated on keeping the cranks going w/ a FW in place and I am easily amused.



-Bandera