Test Drove a 2011 GT500 today
#24
Couldn't be bothered to check it now, but pretty sure the rears are indeed a taller tire so the 3.73's end up being the same as the 3.55's. Besides, it would look awfully strange to have a narrower sidewall on the rear than on the front.
#25
Bullitt Member
![](https://themustangsource.com/forums/images/rank.gif)
Join Date: December 26, 2009
Location: NYC
Posts: 413
Likes: 0
Received 0 Likes
on
0 Posts
I don't recall if we discussed this before, but, what's the point of the 20" in the rear vs. 19"s all around? I assume thre has to be a reason? And logic would dictate it'd be a very good reason as same rim all around would have been cheaper on Ford to supply. Thought's of getting two 19's and putting them on the rear have crossed my mind... Then the 3.73's would show through! I could also dump 4.10's in there.
#26
Bullitt Member
![](https://themustangsource.com/forums/images/rank.gif)
Join Date: December 26, 2009
Location: NYC
Posts: 413
Likes: 0
Received 0 Likes
on
0 Posts
OK, I went and did the math.. PP and 285 / 35R20 vs std on 285/35R19
19" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 26.85in
20" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 27.85in
Now to factor rollout
tire height X Pi / Gear
19" = 26.85 X 3.1416 / 3.55 = 23.76
20" = 27.85 X 3.1416 / 3.73 = 23.46
Where a lower rollout would imply faster acceleration, the 20" is only marginally faster with the 3.73.
For reference
19" = 26.85 X 3.1416 / 3.73 = 22.61
For fun, here's the result of a 4.10 in the PP car
20" = 27.85 X 3.1416 / 4.10 = 21.34
19" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 26.85in
20" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 27.85in
Now to factor rollout
tire height X Pi / Gear
19" = 26.85 X 3.1416 / 3.55 = 23.76
20" = 27.85 X 3.1416 / 3.73 = 23.46
Where a lower rollout would imply faster acceleration, the 20" is only marginally faster with the 3.73.
For reference
19" = 26.85 X 3.1416 / 3.73 = 22.61
For fun, here's the result of a 4.10 in the PP car
20" = 27.85 X 3.1416 / 4.10 = 21.34
#27
Mach 1 Member
![](https://themustangsource.com/forums/images/rank.gif)
![](https://themustangsource.com/forums/images/rank.gif)
Join Date: September 10, 2009
Location: Boston
Posts: 956
Likes: 0
Received 0 Likes
on
0 Posts
OK, I went and did the math.. PP and 285 / 35R20 vs std on 285/35R19
19" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 26.85in
20" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 27.85in
Now to factor rollout
tire height X Pi / Gear
19" = 26.85 X 3.1416 / 3.55 = 23.76
20" = 27.85 X 3.1416 / 3.73 = 23.46
Where a lower rollout would imply faster acceleration, the 20" is only marginally faster with the 3.73.
For reference
19" = 26.85 X 3.1416 / 3.73 = 22.61
For fun, here's the result of a 4.10 in the PP car
20" = 27.85 X 3.1416 / 4.10 = 21.34
19" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 26.85in
20" tire height = 285 x 35% = 99.75MM x 2 = 199.5MM = 7.85in + rim = 27.85in
Now to factor rollout
tire height X Pi / Gear
19" = 26.85 X 3.1416 / 3.55 = 23.76
20" = 27.85 X 3.1416 / 3.73 = 23.46
Where a lower rollout would imply faster acceleration, the 20" is only marginally faster with the 3.73.
For reference
19" = 26.85 X 3.1416 / 3.73 = 22.61
For fun, here's the result of a 4.10 in the PP car
20" = 27.85 X 3.1416 / 4.10 = 21.34
#28
The spoiler is functional, not just aesthetic. Its shape provides downforce that significantly improves the handling of the car. Spoiler delete option would not be a good thing...
#29
GT Member
![](https://themustangsource.com/forums/images/rank.gif)
Join Date: November 15, 2008
Location: Pittsboro / Greencastle / Indianapolis
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
I agree about the Kona Blue needing Stripes. I think Blue Mustangs and white stripes go together like Ray Allen and the 3-pt stripe.
#30
Thread
Thread Starter
Forum
Replies
Last Post
Diode Dynamics
Vendor Showcase
3
6/12/18 03:26 PM
tj@steeda
2015 - 2023 MUSTANG
0
7/30/15 06:47 AM