Rolling Resistance Data for >1,000 tires
 

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

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

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?

Excellent report!

A big thanks for finding and posting it :thumbup:

-RH77

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

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.

.

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.

I converted it to excel

here it is on Google Docs no sign in required

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 :-)

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.

Two of the tires I have the most experience with scored well. Conti CH95 and Mich MXV4energy. I couldn't find the Bridgestone RE092.

I compiled the top 5 tires in each size (by my count):
http://ecomodder.com/forum/member-di...h-r17-http.png
http://ecomodder.com/forum/member-di...h-r24-http.png

A Load Index of 118/121 is what is generally associated with 3/4 & 1T pickups. Anything less means the pickup is not able to meet its capabilities (though there are those willing to make that trade-off; generally ride quality associated).

I would post is as a public file on Google Docs.

Thanks MetroMPG ,
My OP link changed, and posted here as well

I'm a little confused by things now. I was all excited by #385 (Bridgestone Dueler Alenza HL P265/70R17) which has a RRC of 6.2. Then I saw what appears to be the same tire as #149 with a RRC of 9.54. As far as I can tell the only difference is that #385 is listed as OE market (original equiptment), whereas #149 is the REP market (replacement). #385 also was reported by Bridgestone itself, whereas #149 comes from "CEC-B".

Seems like a huge difference for the same tire!

Guess what's going on the wish list ;)

Bridgestone B381

I am hoping you realize that the tires are different. #385 - the OE tire - is the tire as designed to meet some OEM's specs, where #149 - the Replacement market tire - was designed for the replacement market. They are NOT the same tire.

It is common for tires to start out as a Replacement market tire, then a program to supply a tire to an OEM comes along and the tire gets redesigned to the OEM's specs - which are a lot about RR and not much about treadwear. The Replacement tire would be completely replaced by the OE tire.

It is also common for the opposite to happen - OE tire first, then when the OEM no longer wants the tire, the tire gets changed to Replacement standards - which means a better wearing tread compound.

So if I want OE tire (#385) is there any way for me to get it?

If I just go looking for a Bridgestone Dueler Alenza HL 265/70R17 tire, will I just automatically get the replacement version (#149)?

Only if it is still in production. At this point that would be very unlikely.

Useful thread. I had missed it. Thanks!