Going from 18's to 20's means.......
03-26-2008, 06:38 PM
#1
4th Gear Member
Thread Starter
Join Date: Nov 2005
Location: FLORIDA
Posts: 1,536
Going from 18's to 20's means.......
Over 1 mpg drop. Does that seem right?They are only 3 lbs heavier that the fanblades. You would think once you got rolling the wheels would turn with less effort. Meaning an increase in MPG. Unless your in stop and go. I had 17 mpg on the gauge when I got to work. 15.7 when I got home. I was getting mid to high 17's before the 20's. Did anybody notice that kind of rediculous drop when they went to 20's?
03-26-2008, 06:55 PM
#6
5th Gear Member
Join Date: Jul 2007
Location: TX
Posts: 4,897
RE: Going from 18's to 20's means.......
Yes, gearing will come more into play. The weight will affect handling, but depends on the wheel! And also moving the rotating weight further out.
I really don't think it's that big of a deal and still get ~19-21mpg with my 20s. Unless the driving computer is f'd up. I don't really care that much about a couple mpgs personally...
I really don't think it's that big of a deal and still get ~19-21mpg with my 20s. Unless the driving computer is f'd up. I don't really care that much about a couple mpgs personally...
03-26-2008, 06:58 PM
#7
4th Gear Member
Thread Starter
Join Date: Nov 2005
Location: FLORIDA
Posts: 1,536
RE: Going from 18's to 20's means.......
I'm just wondering how it drops 1 mpg. I have not done highway yet, I'll get to see that next Saturday going to Lakeland for a car show. I think on the highway it should be higher if you think about it the way I am. Once its rolling, its rolling easier lol
03-26-2008, 07:03 PM
#8
5th Gear Member
Join Date: Jul 2007
Location: TX
Posts: 4,897
RE: Going from 18's to 20's means.......
No, it's pushing more "rotating mass". Makes a difference. You have more weight out further from the axle which increases rotating mass. That is the problem with 20's, even the lightweight 20's. Tire mass/weight.
