aeroprof The 2.5 lb weight difference (Fuji vs Sam) is worth 0.2 mph (1lb =12 mph) and would correct the LIGHTER Fuji time by subtracting 0.2mph to compare to the Sam, or Fuji corrected = 11.4 mph Sam = 11.2 mph
The 0.2mph seems insignificant, probably within the statistical variation of 5 trials It would seem the Sam's riding position is not a large negative effect. Perhaps the Sam is not as upright as the Soma John Hawrylak Woodstown NJ On Monday, July 26, 2021 at 7:49:37 PM UTC-4 aeroperf wrote: > Road bike: 1982 Team Fuji with all 2018 equipment (3x9-spd Sora w/105 > brakes, 622x28 tires, drops) > Riv bike: 2015 Sam Hillborn set up per factory (3x9-spd Suguino/Shimano > w/Tektro rim brakes, 622x42 tires, Albatross) > Both bikes had Sigma BC.12.12 computers which were calibrated. > > The road bike averaged 11.6 mph on 5 trials and the Sam averaged 11.2 mph > on 5 trials. > > To me, the big differences seemed to be in the gearing and rider > position. The Fuji has a 50 tooth big chainring, while my Sam has a 46 > tooth. > Weight seemed at best a secondary effect. The Fuji is 28 lb while the Sam > is 30.5 lb., but I’m 210 lb. > For another comparison, my 31.5 pound Soma Saga Disc heavy touring bike > averaged just less than 11.1 mph on the same 5 trials. It’s big chainring > has 44 teeth. > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/46176c9a-e39f-4aa4-91ed-2dd1c80131f4n%40googlegroups.com.
