Rolling Resistance and tread depth....

My LRR Goodyear G572 drives have 30/32 tread depth which is why I bought then when they first came out. I've been very happy with them and I have seen a lot if new trucks spec'ed with them.
A bald tire will have the lowest rolling resistance.

 

As well as most likely to pick up a nail, hydroplane, get stuck in the snow, and fail in a most spectacular fashion.

 

I had very specific numbers somewhere, but I can't find them. Using Michelins numbers it was something like 3 RR for every 10/32nds. Yes the fuel mileage tire will still be ahead when both tires are worn down to an equal amount. I find tires with a lot of tread tend to wear funny faster. I usually run only tires with 11/32 on my 72" spread step deck, anything higher and the wear gets bad quick.

 

A bald tire will have the lowest rolling resistance.[/QUOTE]


very ,very low, r.r. due to being on the side of the road with a flat or d.o.t. out of service.

 

We are seeing more and more customer who drive primarily on the highway install a regional or mud and snow tire for line haul use. These tires usually have an aggressive tread pattern and therefor and high rolling resistance. Popular tires we see such as Michelin's XDA5+ with a rolling resistance of 143, or even just XDE M/S at 144. Aggressive tread patterns also will wear irregular with extended highway use, such as toe to heal wear or alternating lug wear. Most customers with these tires are unaware of the tire choice they have made is not best suited for their application. Better choices for highway would be like an XD2 with a RR of 126, or one of their all-position steers which have RR around 100. I do not endorse or solely recommend Michelin, they just have nice website.

 

I need new drives soon and have settled on the Michelin XDN2 when these ones are finished. It was either XDN2, X-Line Energy D, or XDA5+. I don't see how my application needs the XDA5+, the X-Line Energy D yes it has a lower RR initially but it also costs more and has less tread.

 

I dont get how tread type and depth and all this rolling resistance stuff matters as far as fuel mileage. I think its alot of hype, is all this info just what these tire manufactors are throwing out? Not tryin to be a dic just sayin i dont get how a truck would roll better with tread x vs tread y

 

The more aggressive the tread is, the more bumpy it is and the more tread block transitions there are. This all contributes to friction.