Rolling Resistance Data for >1,000 tires - Fuel Economy, Hypermiling, EcoModding News and Forum

Diesel_Dave · 11-25-2012, 10:42 AM

Forgive me if someone already posted this, but I came across the motherload of tire rolling resistance data. This .pdf, put out by the Rubber Manufacturers Association in 2009 has rolling resistance data for over 1,000 different tires (tables start on page 47). It also has a wide range of sizes (13 to 22 inch).

http://www.rma.org/rma_resources/gov...20Analysis.pdf

kennybobby · 11-25-2012, 11:53 AM

Many thanks for that find. Here are some observations that i lifted from the report:

"Rolling resistance is due to hysteresis, which is a function of tire chararacteristics such as dimensions, geometry, composition, and thread depth.

The RRC of a tire decreases as the tire wears; this reduction is due in part to the reduction in thread depth.

Rolling resistance is also affected by operating conditions such as load, temperature, and inflation pressure.

The RRC of an underinflated tire is substantially higher than that of a tire that is properly inflated.

A reduction in RRC of 0.001 is expected to increase fuel economy by 1 to 2 percent. The actual increase will be closer to 1 percent for low-RRC tires and urban driving, and closer to 2 percent for high-RRC tires and highway driving."

The probability distribution curve showed the average RRC to be about 0.010 over a range from 0.007 to 0.017.

e.g. Michelin 255/65-17 LTX A/S @ 0.00745

Sven7 · 11-25-2012, 12:11 PM

Nice find.

For those looking for the meat and potatoes, the Appendix 3/4 of the way down has specific tires- brand, model, size- listed together.

Should we sticky this?

RH77 · 11-25-2012, 01:32 PM

Excellent report!

A big thanks for finding and posting it

-RH77

gone-ot · 11-25-2012, 01:37 PM

Wow, now if only all that data were available in spreadsheet format (ha,ha)!!!

slowmover · 11-25-2012, 01:37 PM

Looks like limited to cars and 1/2T pickups. Don't see LOAD INDEX correlating to 3/4T and 1T pickups (which have been fuel economy exempt).

Great find!!

Them Rummers done a good job.

.

Ecky · 11-25-2012, 02:11 PM

Found my front tires (Michelin Destiny) in 2 different sizes, both have a RRC of 9.7.

I'll probably use this next time I'm in the market for tires.

WD40 · 11-25-2012, 03:55 PM

I converted it to excel

here it is on Google Docs no sign in required

Diesel_Dave · 11-25-2012, 04:07 PM

Quote:

Originally Posted by slowmover

Looks like limited to cars and 1/2T pickups. Don't see LOAD INDEX correlating to 3/4T and 1T pickups (which have been fuel economy exempt).

Great find!!

Them Rummers done a good job.

.

There are actually quite a few in that category. My current tires have a load index of 113 (2,535 lbs). There are 87 tires in that list with that load index or higher. There's even one in there with a load index of 120 (3,086 lbs).

I fixed that "Rummer Manufacturers" typo too :-)

serialk11r · 11-25-2012, 04:13 PM

I sifted through the sport tire offerings, not many listed but it seems that the ultra grippy summer ultra high performance tires aren't necessarily all that bad, interesting.

Yokohama Advan A10B for example came in at 9.7 and 10.6 for 2 sizes, and it has a treadwear rating of 160. Michelin Pilot Sport PS2 was 11.1 or so. Kumho Ecsta KH11 10.84. Michelin Pilot Sport Cup 9.23.

The worst one I spotted was a knobbly truck tire at 17 lol.