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Tire size for handling package

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Currently have a 2023 Mach 1 non-handling package in which I’ve installed all of the handling package components thus far except for the springs, I’m sitting on the HP 10 1/2 inch rims front and 11 inch rims on the rear with the stock handling package, tires, 305/30/19 and 315/30/19,
Tires are good, but not for a daily street driving, went to my local tire shop the other day to order a set of 305/35/19 and 285/35/19 nitto n555g2, I know not the best tire, but not I’m looking to spend $800 per again, not for now anyways,
I was told that these tires will not fit on the handling package rims, I was a little dumbfounded because I’ve read more than a dozen posts with people who have that exact fitment on their handling package wheels🤔,
Anybody?

on another note, I called Ford to order the handling package springs to install on my non hp and I was told they cannot confirm nor can they or will they sell them to me because of my vehicle model being a base package suspension not a hp,
 

JDee

Ancient Racer
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I had a set of those 555 Nittos, in 285/305 when I first started out with the Mustang. They don't run wide and while they stand up well to track use they are not very grippy. Most importantly, running staggered with a smaller width front tire than rear tire makes the always present understeer much worse. I ended up using the 555s for wet days, and they were a pretty decent wet weather tire. But a Mustang needs to be on square 305/11 inch rims as a minimum to really shine.

Usually OEMs make suspension components as an integrated package and that can have ramifications right down to bushing durometer and finer details like that. So that is possibly why they don't want to sell you that stuff. Putting the HP springs on a base could have some significant impacts that might make for some unusual results. Shock valving differences, spring rates and sway bar diameter are just some things that wouldn't be apparent and could be different between base and HP. Those things all affect handling.

I have a non-HP 2023 Mach 1. It is stock, as delivered, right down to the tires and wheels. It turns laps pretty much what my former 2016 car could do. That 2016 car was a much modified GT that had the full Ford racing suspension on it and was stripped, gutted and on 305 AR1 slicks. I find the handling of my stock Mach 1 to be every bit as good as that car was, the ultimate G's are lower due to less tire width, but the handling is very good. The Mach 1 is quite a bit faster in a straight line than the '16 so that helps make up for some of the grip loss. Lap times are about a wash between the two, the new car is just a few tenths slower.
 
I had a set of those 555 Nittos, in 285/305 when I first started out with the Mustang. They don't run wide and while they stand up well to track use they are not very grippy. Most importantly, running staggered with a smaller width front tire than rear tire makes the always present understeer much worse. I ended up using the 555s for wet days, and they were a pretty decent wet weather tire. But a Mustang needs to be on square 305/11 inch rims as a minimum to really shine.

Usually OEMs make suspension components as an integrated package and that can have ramifications right down to bushing durometer and finer details like that. So that is possibly why they don't want to sell you that stuff. Putting the HP springs on a base could have some significant impacts that might make for some unusual results. Shock valving differences, spring rates and sway bar diameter are just some things that wouldn't be apparent and could be different between base and HP. Those things all affect handling.

I have a non-HP 2023 Mach 1. It is stock, as delivered, right down to the tires and wheels. It turns laps pretty much what my former 2016 car could do. That 2016 car was a much modified GT that had the full Ford racing suspension on it and was stripped, gutted and on 305 AR1 slicks. I find the handling of my stock Mach 1 to be every bit as good as that car was, the ultimate G's are lower due to less tire width, but the handling is very good. The Mach 1 is quite a bit faster in a straight line than the '16 so that helps make up for some of the grip loss. Lap times are about a wash between the two, the new car is just a few tenths slower.

from relentless and exhausting research, I have learned that the Mach one handling package are only minimal components such as springs camber plates, sway bars, toe links as well as all bushings and hardware, they can be easily installed on a base model, it will not jeopardize any integrity of the vehicles suspension or look
 
I had a set of those 555 Nittos, in 285/305 when I first started out with the Mustang. They don't run wide and while they stand up well to track use they are not very grippy. Most importantly, running staggered with a smaller width front tire than rear tire makes the always present understeer much worse. I ended up using the 555s for wet days, and they were a pretty decent wet weather tire. But a Mustang needs to be on square 305/11 inch rims as a minimum to really shine.

Usually OEMs make suspension components as an integrated package and that can have ramifications right down to bushing durometer and finer details like that. So that is possibly why they don't want to sell you that stuff. Putting the HP springs on a base could have some significant impacts that might make for some unusual results. Shock valving differences, spring rates and sway bar diameter are just some things that wouldn't be apparent and could be different between base and HP. Those things all affect handling.

I have a non-HP 2023 Mach 1. It is stock, as delivered, right down to the tires and wheels. It turns laps pretty much what my former 2016 car could do. That 2016 car was a much modified GT that had the full Ford racing suspension on it and was stripped, gutted and on 305 AR1 slicks. I find the handling of my stock Mach 1 to be every bit as good as that car was, the ultimate G's are lower due to less tire width, but the handling is very good. The Mach 1 is quite a bit faster in a straight line than the '16 so that helps make up for some of the grip loss. Lap times are about a wash between the two, the new car is just a few tenths slower.
What size width rim were you running on your Nitto tires?
 

Bill Pemberton

0ld Ford Automotive Racing Terror
8,489
8,484
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20+ Years
Blair, Nebraska
Sounds like you are using these for on the street and then switching over to the 305s and 315s when you decide to track them, correct? Honestly scratching my head why you didn't bother getting the same size with something else if you are saving the stock HP tires. There are plenty of better choices than the Nittos and not much more money. The Mach drives great on the street with 305s and 315s. Since you have the HP wheels , what happened to the stock wheels?
 
Sounds like you are using these for on the street and then switching over to the 305s and 315s when you decide to track them, correct? Honestly scratching my head why you didn't bother getting the same size with something else if you are saving the stock HP tires. There are plenty of better choices than the Nittos and not much more money. The Mach drives great on the street with 305s and 315s. Since you have the HP wheels , what happened to the stock wheels?
Exactly what I’m doing keeping a set for street and one for track, the original 315/30/19 305/39/19 cup 2,s are great tires but not for street driving in my opinion, and they give a large wheel gap, also with the 305’s up front I’m not crazy about the trammeling thus want to go down to a 285/35, so I’m trying to kill two birds with one stone, narrow up the front tire a little little bit and juice up the profile a touch,
Stock wheels are 9.5 and 10” on 255/40/19 275/40/19,
Any advice on a set of 285/35/19 305/35/19, I only say Nito, because I read a lot of posts of people who have them and are happy with the look and feel
 

Bill Pemberton

0ld Ford Automotive Racing Terror
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Blair, Nebraska
With a nickname of " Schittos " I think you have other solid choices , but a 305 on a 10 inch wheel is pushing it. I would go with a 275 front for a 9.5 inch wheel and 295s in the rear that are only 10 inches in width. Check out a Falken RT660 , as it is a solid street and even track tire since you are looking for a high performance Summer tire.
 
With a nickname of " Schittos " I think you have other solid choices , but a 305 on a 10 inch wheel is pushing it. I would go with a 275 front for a 9.5 inch wheel and 295s in the rear that are only 10 inches in width. Check out a Falken RT660 , as it is a solid street and even track tire since you are looking for a high performance Summer tire.

I have 10 1/2 inch front and 11 inch rear wheels. They are original handling package wheels,
285/35/19 on the front and 305/35/19 on the rears should be proper fitment am I correct?
 
I have 10 1/2 inch front and 11 inch rear wheels. They are original handling package wheels,
285/35/19 on the front and 305/35/19 on the rears should be proper fitment am I correct?
I have a 2024 Dark horse with the handling package, it came with Trofeo RS 305/30/19 front and 315/30/19 rear. I don't track my car and I'm going to change them to something less aggressive for everyday use, and sell the trofeos to someone that tracks their car. The trofeos are a great track tire according to all the magazine testing's.
 
6,394
8,277
I have a 2024 Dark horse with the handling package, it came with Trofeo RS 305/30/19 front and 315/30/19 rear. I don't track my car and I'm going to change them to something less aggressive for everyday use, and sell the trofeos to someone that tracks their car. The trofeos are a great track tire according to all the magazine testing's.
This..
And I would install them on the wheels, not just the rims
 
1,249
1,243
In the V6L
I have a 2024 Dark horse with the handling package, it came with Trofeo RS 305/30/19 front and 315/30/19 rear. I don't track my car and I'm going to change them to something less aggressive for everyday use, and sell the trofeos to someone that tracks their car. The trofeos are a great track tire according to all the magazine testing's.
I went looking for a Trofeo RS review and didn't see any. Can you point me at one? I ran Trofeo R's in the past, I really liked them and they're what I'm switching back to when my current set of MPSC2's wears out. I saw the RS, but they're an OEM tire, and it's not clear what that means. Pirelli's advertising that says "the R's were an aftermarket tire" make it sound like the RS's are better, but frankly, an OEM tire has to past a bunch of OEM tests for things like noise and longevity that the aftermarket tires can skip.
 
I went looking for a Trofeo RS review and didn't see any. Can you point me at one? I ran Trofeo R's in the past, I really liked them and they're what I'm switching back to when my current set of MPSC2's wears out. I saw the RS, but they're an OEM tire, and it's not clear what that means. Pirelli's advertising that says "the R's were an aftermarket tire" make it sound like the RS's are better, but frankly, an OEM tire has to past a bunch of OEM tests for things like noise and longevity that the aftermarket tires can skip.
Car and Driver had an article on the 2024 Dark Horse Titled "Tested: 2024 Ford Mustang Dark Horse Reaches Mach 2.0". In the article they talk about the tires and compare them to the Trofeo R tire. If you google the Dark horse there are a lot of videos out there and they all say how great the tires are.
 
349
309
Exp. Type
Time Attack
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Under 3 Years
Bulgaria
I went looking for a Trofeo RS review and didn't see any. Can you point me at one? I ran Trofeo R's in the past, I really liked them and they're what I'm switching back to when my current set of MPSC2's wears out. I saw the RS, but they're an OEM tire, and it's not clear what that means. Pirelli's advertising that says "the R's were an aftermarket tire" make it sound like the RS's are better, but frankly, an OEM tire has to past a bunch of OEM tests for things like noise and longevity that the aftermarket tires can skip.
I think @Fair could provide a bit more data on the Trofeo RS and he also created this lovely video comparing them to the Yoko A052 (current 200TW king tire):

 

Bill Pemberton

0ld Ford Automotive Racing Terror
8,489
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Blair, Nebraska
Things are exciting in the Tire Wars as there is alot of conjecture and data that the A052 may have given up the crown back to the RE71RS. Just ask DaveW of solo performance.com as he has run both, granted he is an example of what is hot autocrossing. Recent TireRack tests and others seem to show the Bridgerock lasts a bit longer on a road course , and with the folks I have been with on track I would have to say that seems to be born out. Just an interesting note and not denying bnight's thoughts, but with the new Nankang CR-S ( version 2 ) the fight is on and we are the ones who will benefit the most.
 
349
309
Exp. Type
Time Attack
Exp. Level
Under 3 Years
Bulgaria
Things are exciting in the Tire Wars as there is alot of conjecture and data that the A052 may have given up the crown back to the RE71RS. Just ask DaveW of solo performance.com as he has run both, granted he is an example of what is hot autocrossing. Recent TireRack tests and others seem to show the Bridgerock lasts a bit longer on a road course , and with the folks I have been with on track I would have to say that seems to be born out. Just an interesting note and not denying bnight's thoughts, but with the new Nankang CR-S ( version 2 ) the fight is on and we are the ones who will benefit the most.
I actually ordered A052's for this season because the new CR-S are really really expensive. My class don't have TW restriction though but A052 should be faster than the AR-1's at least based on test data that I have seen (will have mine test data as soon as the A052 arrive). CR-S is doubtful to be faster based on some things I read and seen but even if it's it won't be a lot faster. Granted the A052 in 19 is only 295/35/19 but I hope this will help with top speed. We will see soon how this will play out.
 

Bill Pemberton

0ld Ford Automotive Racing Terror
8,489
8,484
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20+ Years
Blair, Nebraska
The issue with the A052 is not speed it is wear. I would drive on them some prior before going to the track, but what folks see with them ( because they are super popular for autocrossing ) is they wear faster than most. Keep in mind that DaveW is running Bridgestone 295/18 on his huge wheels in CAMC so there are always exceptions to having the widest tire. I would rotate often and the Yokes are really fast for 1-3 laps on a road course, so keep that in mind for when you want your quickest time.
 
349
309
Exp. Type
Time Attack
Exp. Level
Under 3 Years
Bulgaria
The issue with the A052 is not speed it is wear. I would drive on them some prior before going to the track, but what folks see with them ( because they are super popular for autocrossing ) is they wear faster than most. Keep in mind that DaveW is running Bridgestone 295/18 on his huge wheels in CAMC so there are always exceptions to having the widest tire. I would rotate often and the Yokes are really fast for 1-3 laps on a road course, so keep that in mind for when you want your quickest time.
I don't worry about wear as much as I get the fastest tire possible. And fast for 1-3 laps is exactly what I need because of the car doing time attack and not real HPDE days. As I said more data to fallow :)
 

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