Do you daily drive on 20 inch wheels?
08-08-2013, 07:16 PM
#32
The tires we use are similar in that regard (summer tires, all seasons, drag radials, etc all different compound types)
08-08-2013, 08:37 PM
#33
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08-09-2013, 12:51 PM
#35
Join Date: Jul 2012
Location: California
Posts: 4
It's an extreme example, sure, but the principles are fully applicable. If low profile rubber produced superior handling across the board as you were claiming, then the most competitive racers with the most riding on handling would surely be taking advantage of it. They aren't. (nor is Nascar, NASA, or even SCCA autocross, except in classes limited to using OE tire/wheel sizes by the rules)
08-09-2013, 01:26 PM
#36
Happy?
I already said you get a somewhat better turn in on low profiles. You also trade off control and predictability at the limits significantly.
Dude, believe whatever it is you want to believe, I'll just be over here in the real world...
08-09-2013, 02:49 PM
#37
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Join Date: Sep 2006
Location: Gainesville, FL
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I think like 95% of ferrari's and other supercars including enzo, 599 gto , mclaren mp4c, corvette z06's zr1, porsche carerra gt's gt2 gt3 911 turbo, vipers, lambos, veyron, pagani's, koenigseggs, zonda and others use 19's or 20's with low profile tires
One of the reasons for this is that this size wheels can clear much larger rotors and calipers. Theres probably other reasons too. Id think that these cars would have the highest performance wheel setup possible.
The weight difference in wheels is not an issue since lower profile tires weigh less than higher profile tires, it cancells it out usually. Less sidewall flex also makes steering quicker and more responsive.
One of the reasons for this is that this size wheels can clear much larger rotors and calipers. Theres probably other reasons too. Id think that these cars would have the highest performance wheel setup possible.
The weight difference in wheels is not an issue since lower profile tires weigh less than higher profile tires, it cancells it out usually. Less sidewall flex also makes steering quicker and more responsive.
It's all ready been shown to cost you 20rwhp on the dyno going from 19's to 20's and not just on the mustangs. That's enough for me not to do it. I wouldn't run anything bigger than 18's on a street car/daily driver.
08-09-2013, 02:57 PM
#38
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And I will put these skinny *** 235/55/17's up against anyone's 20 inch tires in a straight line.
Last edited by moosestang; 08-09-2013 at 03:02 PM.
08-09-2013, 03:40 PM
#39
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Join Date: Apr 2008
Posts: 1,792
Dude! A 295/45/17, my drag radial size for reference only, isn't going to weigh significantly more than an equivalent width 20 inch performance tire, if any, but a 20 inch rim, any 20 inch rim is going to weigh a lot more than a 17.
It's all ready been shown to cost you 20rwhp on the dyno going from 19's to 20's and not just on the mustangs. That's enough for me not to do it. I wouldn't run anything bigger than 18's on a street car/daily driver.
It's all ready been shown to cost you 20rwhp on the dyno going from 19's to 20's and not just on the mustangs. That's enough for me not to do it. I wouldn't run anything bigger than 18's on a street car/daily driver.
you can find average weights for wheels and tires of different sizes
I see that the average 295 30 20 tire weighs 27 lbs, and the average 295 45 17 tire weighs 31 lbs.
There is a relatively significant difference in wheel weight stated on this site, but i have lightweight forgestar rims that arent normal heavy chrome wheels that they assume 20's are. They say the average 20x10.5 rim weighs 43 lbs, and your 17x10.5 rim average weight they say is 31 lbs.
My actual rim weight is ~29 lbs for 20x10.5 forgestars and my tires weigh 29 lbs. Not all rims are heavy weight full bling chrome rims
Last edited by Andy13186; 08-09-2013 at 03:45 PM.
08-09-2013, 04:52 PM
#40
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Join Date: Jul 2006
Location: New Orleans
Posts: 4,491
if you go to http://www.rimsntires.com/specs.jsp
you can find average weights for wheels and tires of different sizes
I see that the average 295 30 20 tire weighs 27 lbs, and the average 295 45 17 tire weighs 31 lbs.
There is a relatively significant difference in wheel weight stated on this site, but i have lightweight forgestar rims that arent normal heavy chrome wheels that they assume 20's are. They say the average 20x10.5 rim weighs 43 lbs, and your 17x10.5 rim average weight they say is 31 lbs.
My actual rim weight is ~29 lbs for 20x10.5 forgestars and my tires weigh 29 lbs. Not all rims are heavy weight full bling chrome rims
you can find average weights for wheels and tires of different sizes
I see that the average 295 30 20 tire weighs 27 lbs, and the average 295 45 17 tire weighs 31 lbs.
There is a relatively significant difference in wheel weight stated on this site, but i have lightweight forgestar rims that arent normal heavy chrome wheels that they assume 20's are. They say the average 20x10.5 rim weighs 43 lbs, and your 17x10.5 rim average weight they say is 31 lbs.
My actual rim weight is ~29 lbs for 20x10.5 forgestars and my tires weigh 29 lbs. Not all rims are heavy weight full bling chrome rims