Fuel consumption - Rft vs normal tyres!

[TorontoKhan]

I have newer generation Bridgestone RFTs (255/50/19) and I was told since they are newer generation they aren't that stiff but boy are they stiff or are they stiff. You can feel a bump even if you pass a 1" patch.

And I do Ultra94, which gets me about 480km per tank with these tires on.

[cb4]

Just to give you an idea how much more the RFTs weigh. *The Michelin
18 inch rft that come on the x5 weigh 13 lbs more per tire over the
non rft Michelin equivalent (source: tirerack.com). 52 lbs of
rotational mass will definitely affect fuel efficiency.

When I went to non rft on my 3er my fuel efficiency went up by ~.5mpg.
I attribute that to the reduction in mass at the corners(total weight loss: ~40lbs).

I myself am keeping the RFT on my x5. *Unfortunately with the 3rd row
there is no room for a spare


Sent from my iPhone

[SJCFlyer]

Originally Posted by cb4

Just to give you an idea how much more the RFTs weigh. *The Michelin
18 inch rft that come on the x5 weigh 13 lbs more per tire over the
non rft Michelin equivalent (source: tirerack.com). 52 lbs of
rotational mass will definitely affect fuel efficiency.

When I went to non rft on my 3er my fuel efficiency went up by ~.5mpg.
I attribute that to the reduction in mass at the corners(total weight loss: ~40lbs).

I myself am keeping the RFT on my x5. *Unfortunately with the 3rd row
there is no room for a spare

I went non-RFT after buying a portable inflator, patch kit and can of goop. Mileage, Ride and price are all MUCH better!

[Lane_A]

I switched from Dunlop RFTs to Michelin Non-RFTs and my gas mileage improved by just over 1 mpg, plus there's no comparison in the comfort and lower noise levels that the Non-RFTs give.