Quote:
Originally Posted by SentraSE-R
In the interest of science, and because I have a curious mind, I bought taller tires today. I was browsing Craigslist yesterday, and found four used Goodyear Eagle NCT 5s with 70% tread for $30 each, size 205/50-17. I've saved >$1700 hypermiling, so I don't feel guilty spending some of my savings on the frivolity of pretty wheels.
The new tire/wheel combo is 5.31% taller, 25.07" to the stocker 185/60-15s' 23.74". They turn 829.6 rpmile v. 876.1 rpmile for the stockers. So when the engine used to spin ~3000 rpm to go 60 mph, it will now spin ~2840. They rub a bit on full left turns, but so did the stock tire/wheel combo.
The stockers had a 5% speedometer error (60 mph indicated was about an actual 57 mph), but no odometer error. The new tires should correct my optimistic speedometer, with their 5.6% slower factor, and I'll need to incorporate a 5.6% odometer error.
I hope to do some ABA testing in the future.
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Weight.......weight..........weight............:co nfused:
TIRERACK says that an 185 weights 18 lb and the 205 weights 24lbs
15 inch alloy rim 15.4 lbs 17 inch same brand is 17.6lbs.
your vehivcle weights 2395lbs
while moving you are slinging an additional 40lbs at each wheel or all 4 wheels moving have added 5% to the curb weight.........
you will be buying rotors and pads.......