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Old 02-09-2012, 10:19 PM   #73 (permalink)
mcrews
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The Q Sold - '02 Infiniti Q45 Sport
90 day: 23.08 mpg (US)

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Quote:
Originally Posted by racerc2000 View Post
humm I wonder if I will notice an increase in my FE

dont laugh but I have a 2010 honda element SC not exactly the most gas friendly vehicle with my best mpg being 24.4 :/

but my oem wheels and tires are very heavy. 18x7 with some 225/55-18s.

they weigh in @62lb wheel+tire

ive purchased some larger wheels.

19X9 and 19X10s with 245/45-19 front 275/40-19 rear. (I understand rolling resistance will be worse.)

but the fronts will weigh in @45lb the rears 49lb

do you think this will effect my economy in a good or bad way?
you didnt think this thru did ya???!!!!!!
1. 19" are always more expensive than 18 or 20.
2. all you have to do is look on tire rack.com under specs
3. old size 27.7 inches in diameter
new tire 27.8 inches in diameter
4. so from that alone you are no better off....just out a lot more $$$$
5. both tires weight 28-29lbs so they are the same.
I really cant believe that the rims only weigh16lb front and 20 lbs rear.....
6. you should have gone with a 20 inch rim and tires that were 29 Inchs in diameter.
7. weight savings.....IF you weight is correct wont really help mileage. But it will reduce the dynamic load on the brakes and suspenion parts.
8. However, the ride will suffer because of the rubberband type tires. The suspension will have to do more work.
9. also the slightly wider width will cause a slight increase in the frontal area, potentially reducing mpg.
10. bottom line....spending to much $$$ for just 'looks' and no gain.
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ECO MODS PERFORMED:
First: ScangaugeII
http://ecomodder.com/forum/showthrea...eii-23306.html

Second: Grille Block
http://ecomodder.com/forum/showthrea...e-10912-2.html

Third: Full underbelly pan
http://ecomodder.com/forum/showthrea...q45-11402.html

Fourth: rear skirts and 30.4mpg on trip!
http://ecomodder.com/forum/showthrea...tml#post247938
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