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Originally Posted by Winfield1990
........#2 , I would worry more about tire weight for unsprung weight than LRR , if your really interested in MPG , there is alot more slip from having LRR and less traction while accelerating , and you have to slow down more on turns , and your breaking and performance are sacraficed that way leading to inefficiencies there. MAy or may not be a good trade off depending on where you live of course. Biggest question is what speeds do you normally coast through turns?....
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This does not make sense. While weight reduction results in lower roling resistance, tread compound plays a HUGE role in RR - and RR, Treadwear, and Traction are tradeoffs - which is what is being alluded to here.
So weight by itself has little bearing on traction - other than the fact that as tire wear, they lose both traction and weight and the result is better fuel economy - but every tire does that.
Quote:
Originally Posted by Winfield1990
.......#3 , LRR arent they noisier tires also? .....
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No, while noise generation also generates heat, it is such a small effect, you can pretty much discount any connection.
Besides, the new ECE regulations will have RR, Noise, and wet traction as regulated items for tires. If anything, the new generation of LRR tires will also be less noisy to meet these regulations.
Quote:
Originally Posted by Winfield1990
.......if the price is roughly the same go with the skinnier and or shorter tire that fits on your wheel. Aerodynamic drag and weight of the tires , I think are going to be more important 80% of the time than being low rolling resistance.......
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Sorry, but wider and taller result in better RR. I cover that here:
Barry's Tire Tech
- AND - Aerodrag of tires is such a small portion of the overall drag of the vehicle that changes in RR due to it being wider are over-whelmed by the improvement in RR.
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Originally Posted by Winfield1990
.......Lighter tires give less road noise .......
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Sorry, not true.
Quote:
Originally Posted by Winfield1990
.......and a more comfortable ride also.
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That is true, but you will also get a more comfortable ride by going larger (wider and taller).