Max Speeds in each gear at 6500 rpm for various wheel/tire/transmissions
TIRE SIZE 1st,2nd, 3rd, 4th, 5th, rpm @ 60mph
Manual 2008
195/55x15 30.5, 56.5, 80, 109, 140, 2794
205/45x16 30.3 56.1 79.4 108.1 138 2815
205//40x17 30.5 56.5 80 109 140 2792
175/65x15 31.2 57.7 81.7 111 143 2734
195/50x15 30 55 77 105 135 2888
automatic 2008
195/55x15 33 59.2 93.2 132 181 2157
205/45x16 33 59 93 131 179 2174
205/40x17 33 59 93 132 181 2156
195/50x15 32 57 90 127 174 2241

manual 2009
185/55x16 30.4 53.7 77.1 106 138 2821
205/45x16 29.4 52.1 74.7 102.6 134 2912
205/40x17 29.7 52.5 75.3 103.5 135 2888
automatic 2009
185/55x16 34 60.6 95.4 103 134 2114
205/45x16 33 58.8 92.5 130 179 2182
205/40x17 33.2 59.2 93.2 131 180 2164

Pushout ( how far out outer wheel edge is from hub) of various wheel/tire combinations See bottom for calculation new vs old

WHEEL SIZE, offset, and ‘pushout’, inches (multiply by 25.4 to get mm)
5x14 45 .335
6x15 . 55 .835
6x15 45 .394
7x15 45 1.728
7x15 42 1.846
7x15 40 1.925
8x15 45 2.228
5x16 53 .913
7x16 50 1.531
7x16 45 1.728
7x16 40 1.925
8x16 42 2.346
6x17 50 1.031
7x17 42 1.846
8x17 45 2.228
6.5x16 45 1.478
6.5x17 45 1.478
7.5x17 48 1.86
7.5x17 45 1.978

To find out how far out the new wheel and tire will be, subtract the pushout of old wheel / tire from the new wheel / tire pushout. Thats how much further out horizontally the new wheel/tire will be at every point. tread. sidewall, etc.

 

very cool! +rep for your hard work!

 

More power to you. I'm interested in seeing your data! So far I can't see anything, is that as it should be?

 

Found this awhile ago. Maybe u guys can try this gear ratio calculator(01-07 Honda Fit/Jazz 5MT gear ratio plus others):

MFactory Competition Products - THE Replacement for Displacement!

 

Thanks but using excel formulas took only a few minutes. In fact it took far longer to transfer to a word doc that would transfer in Fit Forums. Unfortunately spaces apparently are ignored so you just have to figure the numbers succession.
The nice thing about pushout is you can premeasure any wheel/tire combination in the chart for how far in or out the wheel/tire will move outward and see if the tire is still in the fender. And all you need is a ruler.
Or to be gloriously scientific you can stick chunks of foam the thickness of the difference in pushout on your tire at the tread corner and see if it gets knocked off. If it does expect rubbing.

 

great work, this is a great reference tool +reppage!

 

Thanks for the info +rep

 

Hi, I'm a new Fit owner and new forum member. I own a 2008 Fit sport, it came with 195/55/15 tires. My question is, can i go to a 205/60/15 tire without causing any problems.

Also, i would like to know if there are heated side mirrors available for my 2008 Fit, as they were not available as an option. Thank you.

 

how are you getting 45 mpg? are you driving 35 mph? or did you do something to improve your fuel economy?

 

No. If you need to go to wide 15" tires put 205/50x15's on. They are a tad smaller diameter so the mpg won't be as affected. Acceleration probably better if you choose one of the lighter tires with proper load rating.

 

Thanks for the response mahout. Appreciate it

Yu don't anything about heated mirrors do you?

 

Youre welcome.
There used to be an aftermarket device that was essentially a little heater fan that attached to your mirror or window that blew 'heated' air on the mirror. Power came from 12v cigarette liter. But that was many years ago.
Have you googled it? Tried JC Whitney? they're into that kind of stuff; probably where I saw many years ago.
Or asked Canadians?
good luck.

 

actualy i get my best MPG at about 45 in flat road... coasting alot helps too, I never use the A/C, and i dont do highway... rual driving, around 45mph with out stops or slowing down....