Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Increased tire pressure and center wear (tread depth checked after 1 year / 30k mi.)

MetroMPG · 01-21-2014, 07:06 PM

Thanks for posting your data!

My experience (Pontiac Firefly/Chev Metro):

- 155/80r13 tires
- 30,000 km / ~20,000 miles
- PSI significantly above sidewall maximum (44 PSI)

No obvious center wear (by eyeball, not by depth gauge).

I won't be surprised to learn there are some vehicle/tire combinations where the tires have worn in the center from high pressure. Best advice is to monitor/measure rather than set & forget.

01-21-2014, 07:06 PM	#2 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,527 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 6,976 Times in 3,612 Posts	Thanks for posting your data! My experience (Pontiac Firefly/Chev Metro): - 155/80r13 tires - 30,000 km / ~20,000 miles - PSI significantly above sidewall maximum (44 PSI) No obvious center wear (by eyeball, not by depth gauge). I won't be surprised to learn there are some vehicle/tire combinations where the tires have worn in the center from high pressure. Best advice is to monitor/measure rather than set & forget. __________________ 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