Tire Question
12-20-2007, 10:01 AM
#11
I ♥ Acer
Join Date: Sep 2007
Location: Not really sure, Alabama
Posts: 2,346
RE: Tire Question
ORIGINAL: Derf00
245/40 is a SMALLER tire, not bigger...
There is about a 1/4-1/2 inch difference in overall diameter between the 245/45 and the 245/40 tire. 245/40has a wall height of110 mm while the 245/40 has a wall height of 98 mm. 25.4mm to an inch.
ORIGINAL: jmac72187
Your speedo will read 3.8% too slow. You won't notice much difference. Going with a bigger tire is similiar to going with a lower ratio gear, but that is too small of a difference to notice.
Your speedo will read 3.8% too slow. You won't notice much difference. Going with a bigger tire is similiar to going with a lower ratio gear, but that is too small of a difference to notice.
There is about a 1/4-1/2 inch difference in overall diameter between the 245/45 and the 245/40 tire. 245/40has a wall height of110 mm while the 245/40 has a wall height of 98 mm. 25.4mm to an inch.
You just said that the same tire has different wall heights.
12-20-2007, 10:02 AM
#13
I ♥ Acer
Join Date: Sep 2007
Location: Not really sure, Alabama
Posts: 2,346
RE: Tire Question
ORIGINAL: jmac72187
Your speedo will read 3.8% too slow. You won't notice much difference. Going with a bigger tire is similiar to going with a lower ratio gear, but that is too small of a difference to notice.
Your speedo will read 3.8% too slow. You won't notice much difference. Going with a bigger tire is similiar to going with a lower ratio gear, but that is too small of a difference to notice.
12-20-2007, 02:52 PM
#14
5th Gear Member
Join Date: Nov 2006
Location: So Cal
Posts: 3,569
RE: Tire Question
ORIGINAL: 1fstblckgt
No it wont.
ORIGINAL: POISND U
It's gonna look like ***...
It's gonna look like ***...
No it wont.
Assuming he is stretching that accross a 18x9 wheel, it will. That's why I said I may have spoke too soon. 18x8 and he's fine.
12-20-2007, 07:13 PM
#15
1st Gear Member
Join Date: Oct 2007
Posts: 77
RE: Tire Question
[quote]ORIGINAL: 97targa
Wrong! RPM's are measure by engine speed. You could put tractor tires on your car and it will read the same rpm's to get the specific hp and tq ratings on a dyno.
Not quite the answer to my question but I get the point
ORIGINAL: SnakeCarDriver
Speed is measured at tire RPM's??
Speed is measured at tire RPM's??
Not quite the answer to my question but I get the point
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