Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Tire sidewall height vs rolling resistance?

lasitter · 09-18-2015, 11:12 AM

Focus-Ak: Thanks for updating the charts.

I have a couple of additional questions / observations.

This is showing rolling force for non-LRR tires or LRR tires?

And: As you would expect, most of the data points are for passenger cars like the Prius. My truck has factory options for 215/75R15 and 235/75R15, and I'm running the latter (non-LRR). The smaller tire can do much less in the way of load carrying.

The chart has one line for 16" wheels, and it seems to suggest lower rolling resistance. I have insufficient load options in 16" so I've just ordered a set of Bridgestone Dueler H/L 422 Ecopia XL in 235/65R-17.

I'm hoping by reducing combined wheel/tire weights and switching to an LRR tire my rolling resistance and economy will be the same or better, at least after some of the tread wears away.

09-18-2015, 11:12 AM	#25 (permalink)
lasitter EcoModding Lurker Join Date: Mar 2011 Location: Ludlow, MA, USA Posts: 56 Thanks: 1 Thanked 0 Times in 0 Posts	Focus-Ak: Thanks for updating the charts. I have a couple of additional questions / observations. This is showing rolling force for non-LRR tires or LRR tires? And: As you would expect, most of the data points are for passenger cars like the Prius. My truck has factory options for 215/75R15 and 235/75R15, and I'm running the latter (non-LRR). The smaller tire can do much less in the way of load carrying. The chart has one line for 16" wheels, and it seems to suggest lower rolling resistance. I have insufficient load options in 16" so I've just ordered a set of Bridgestone Dueler H/L 422 Ecopia XL in 235/65R-17. I'm hoping by reducing combined wheel/tire weights and switching to an LRR tire my rolling resistance and economy will be the same or better, at least after some of the tread wears away.