Quote:
Originally Posted by GreenHornet
Upsized wheels can have a benefit on MPG if done properly ie they are lighter such as going from a a heavy stock 13" steel wheel to a lighter weight 15" alloy wheel. However often times many people make the mistake of getting a lighter and larger diameter alloy wheel and not checking on tire weights and options. So they may get the lighter weight wheel but end up with a heavier tire negating the potential benefits! If your goal is MPG then you want a light weight, tall, and narrow tire. If your goal is a street racer and mpg is of no concern then you will want the extra meat on the pavement so go for a wider wheel and tire selection but still pay attention to both the wheel and tire weights as they both make a difference in performance!
GH.
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My main goal is fuel economy, I thought heavier rims will have positive effect when coasting down than lighter rims but I understand that going up hill will be the opposite.
I have 15'' not so light rims right now, the over all weight tire+rims are heavier than the stock ones, I will put them on a scale when I have a chance.
The test is still in progress, so far I noticed that I can go further when coasting down or on flat road.
According to this site I need to get 195/50R15 tires instead of 195/60R15 that I have right now.
http://www.1010tires.com/Tools/Tire-...0R13/195-50R15