Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Experiment: coast down distances (rolling resistance) @ various tire pressures

MetroMPG · 12-30-2011, 10:58 PM

It puzzled me too.

I think I mentioned elsewhere in this thread: I was expecting to see the rolling distance go up measurably each 10 psi, and because I didn't, I repeated the test the next day.

Different location, same pressures, similar results (overlap/noise in the 60/70 psi range).

Maybe someone can come up with a better way to DIY test a tire's RR.

12-30-2011, 10:58 PM	#55 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,530 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Even Fancier Metro - '14 Mitsubishi Mirage top spec 90 day: 70.75 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 62.14 mpg (US) Thanks: 4,078 Thanked 6,978 Times in 3,613 Posts	It puzzled me too. I think I mentioned elsewhere in this thread: I was expecting to see the rolling distance go up measurably each 10 psi, and because I didn't, I repeated the test the next day. Different location, same pressures, similar results (overlap/noise in the 60/70 psi range). Maybe someone can come up with a better way to DIY test a tire's RR. __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget