Warning about HRE wheels and how they fit

[Skye]

Someone Explain to me what the OP means by HT53 etc?

The term "ET53" is a reference as to how many millimeters (MM), the wheel is pushed inside or outside of the rim's centerline. Rims with a (+) are drawn to the inside of the wheel well, relative to the centerline of the rim. Wheels with a (-) offset are pushed towards the outside. The greater the number, the more the offset, in MMs. A wheel with an ET of +53 will be tucked towards the inside of the wheel well more than a wheel with an ET of +35.

For Mustangs in-general, wheels on the rear often have an ET of a greater (+) number in the rear than the front, as the rear suspension will accommodate a wider wheel and tire.

The factory wheels on my '22 were ET of +24 (front) and +56 (rear). But I changed that. I'm currently running with an ET of +35 all-around, for a simpler square (tires all same size) setup (285/35/19). On the front, I have a thumb's width of gap to the strut.

A change in offset of only a few MMs can be meaningful (poke, necessary alignment adjustments, suspension and/or brakes touching).

I noticed you live in Indiana. Think of your long-term objectives with the car, rims and tires. If you want to ever run an A/S tire for the colder seasons, you might need yet another set of rims. Summer tires and their sizes are plentiful. A/S treads, not so much.

It's always a good idea to confirm things as much as possible before purchase. It's my belief that most vendors test and measure their products with factory suspensions and alignments, unless noted elsewhere. For safety reasons, most vendors will not accept returns.

https://cncwheels.com.au/wheel-offset-explained/

https://www.oponeo.co.uk/blog/wheel-width-and-et-offset-explained#:~:text=Offset is stamped on a,wheels will protrude further out.

"Offset is stamped on a wheel as an ET value, which refers to the German phrase “Einpress Tiefe.” ET indicates the distance between the mounting surface and the geometric centre of the wheel (the symmetry axle), usually expressed in millimetres.

When the ET value decreases, the alloy wheels will protrude further out. An increased ET value, on the other hand, results in moving the wheel location deeper into the wheel arch."

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[REV745DH24]

We are sorry to hear the trouble you are going through ! Feel free to let us know if any fitment questions we will take care of you

Nice response, that’s what makes you reputable among all the Mustangers!! Much appreciated from all of us!

 

[Interstellar]

@FFCobra you and @Supra Killer have the same wheels. The only difference is your tire width and you seem to have a bit more camber

 

[Joe_Cool]

I appreciate the insight on this; I just picked up a set of HRE FF10's in the same configuration and am waiting on tires to come in. I bought these wheels to replace the Mach-1 HP wheels i had on the car as the offset caused rubbing in the front as well as a ton of poke. This is my first-time adding aftermarket wheels to a car so I have a lot to learn, I went with 275/35r20 & 305/35r20 tires as I noticed many chose that size between the vendors on this forum as well as folks on the 6g forum. I also noticed that some people on this thread ran a rear tire with a smaller aspect ratio than the front which i didn't know could be done but makes sense in order to retain the overall tire height. My question is will I be ok running a taller rear tire, or should I drop the rears down to a 305/30r20?

 

[Project6GR Wheels]

Nice response, that’s what makes you reputable among all the Mustangers!! Much appreciated from all of us!

We have been in the mustang community for years! and are glad to be apart of, always here to help!

 

[agreywolfe]

I appreciate the insight on this; I just picked up a set of HRE FF10's in the same configuration and am waiting on tires to come in. I bought these wheels to replace the Mach-1 HP wheels i had on the car as the offset caused rubbing in the front as well as a ton of poke. This is my first-time adding aftermarket wheels to a car so I have a lot to learn, I went with 275/35r20 & 305/35r20 tires as I noticed many chose that size between the vendors on this forum as well as folks on the 6g forum. I also noticed that some people on this thread ran a rear tire with a smaller aspect ratio than the front which i didn't know could be done but makes sense in order to retain the overall tire height. My question is will I be ok running a taller rear tire, or should I drop the rears down to a 305/30r20?

There's many reasons why people would run a smaller aspect ratio in the rear. One reason people will run a smaller aspect ratio is to keep the rear tire roughly the same size as the front tire. For example here is what your 275/35 305/35 will look like side by side

You'll be fine to run similar ratios. The only tradeoff between the two is same size tires at the sacrifice of rear ride comfort due to a smaller, and by consequence, stiffer sidewall.

 

[VELGEN WHEELS]

Thirsty Around here......

To the OP..... A 20x11 with a ET50 and running a 315-35-20 its tad aggressive for us. I would have told you to run a 305-35-20 to help with the tire fender fitment. Running a 20x11 et 50 with a 305 would have been perfect fitment I see in your post you stated that the Vendor suggested a 305 but you ran the 315, you really cant blame the vendor if they told you the right suggested tire. Iam also guessing you are adding the camber to push the wheel inside the fender to give you the fitment you want, but remember its the tow whats key on these cars. Sometime's it's good to contact the manufacture just to confirm fitment and tire questions, if not 100 % sure on tires. I have attached some images below on our fitment running 20x11 with 315-35-20 & 305-35-20

 

[highvoltage]

Running a 11" wheel has nothing to do with needing to run an excessive amount of camber. That IMO is a lot of camber even for a street set-up.
It is the Offset that is making him run that much camber.
I didn't really see him blaming anyone just give others a heads up!




Velgens fit perfect. They have lots of pictures showing this.

lol -2.5 isn’t excessive and he is blaming. Read his posts! He says 2mm of more offset would help which is laughable. His Offset has nothing to do with it. 50-52mm he wouldn’t even notice.

 

[Joe_Cool]

There's many reasons why people would run a smaller aspect ratio in the rear. One reason people will run a smaller aspect ratio is to keep the rear tire roughly the same size as the front tire. For example here is what your 275/35 305/35 will look like side by side

You'll be fine to run similar ratios. The only tradeoff between the two is same size tires at the sacrifice of rear ride comfort due to a smaller, and by consequence, stiffer sidewall.

Great info, thank you! I think im going to go with 305/30r20's for the rears as i do want the tires to be relatively the same size. Plus giving the extra room should yield for a flush fit & alignment.

 

[Project6GR Wheels]

‘I don’t see any poke. I hate any poke. About as much as I hate too much negative camber. Lol

Here is our 20x11 with a 315/30/20 Let us know if you see any poke also lowered on steeda springs. Doesnt seem aggressive to us fitment looks perfect

 

[Interstellar]

Here is our 20x11 with a 315/30/20 Let us know if you see any poke also lowered on steeda springs. Doesnt seem aggressive to us fitment looks perfect

Can you stop posting this picture, every time I see it I want to buy them!!!! I need a new TV but these are just soooo nice.

 

[Project6GR Wheels]

Can you stop posting this picture, every time I see it I want to buy them!!!! I need a new TV but these are just soooo nice.

haha the tv can wait ! wheels are a must!

 

[Interstellar]

I appreciate the insight on this; I just picked up a set of HRE FF10's in the same configuration and am waiting on tires to come in. I bought these wheels to replace the Mach-1 HP wheels i had on the car as the offset caused rubbing in the front as well as a ton of poke. This is my first-time adding aftermarket wheels to a car so I have a lot to learn, I went with 275/35r20 & 305/35r20 tires as I noticed many chose that size between the vendors on this forum as well as folks on the 6g forum. I also noticed that some people on this thread ran a rear tire with a smaller aspect ratio than the front which i didn't know could be done but makes sense in order to retain the overall tire height. My question is will I be ok running a taller rear tire, or should I drop the rears down to a 305/30r20?

I would go with the 305/30 in the rear
Stock 255/40/19 are 27" tall.
305/30/20 are 27.2" tall.
305/35/20 are 28.4" tall.
EDITEDIT: I just looked and the performance pack rear wheels are 275/40/19 which are 27.7" tall.
I wonder if the speedometers are calibrated differently between the GT and GT PP. This also begs the question, is it better to go 35 or 30 if you don't have PP or do have PP?

With the 35s your speedometer will definitely be off. however @VELGEN WHEELS just posted a bunch with the 35s in the rear and they look and I'm sure perform fine. Just not what I would do personally

 

[Interstellar]

I would go with the 305/30 in the rear
Stock 255/40/19 are 27" tall.
305/30/20 are 27.2" tall.
305/35/20 are 28.4" tall.
EDITEDIT: I just looked and the performance pack rear wheels are 275/40/19 which are 27.7" tall.
I wonder if the speedometers are calibrated differently between the GT and GT PP. This also begs the question, is it better to go 35 or 30 if you don't have PP or do have PP?

With the 35s your speedometer will definitely be off. however @VELGEN WHEELS just posted a bunch with the 35s in the rear and they look and I'm sure perform fine. Just not what I would do personally

I just looked and the performance pack rear wheels are 275/40/19 which are 27.7" tall.
I wonder if the speedometers are calibrated differently between the GT and GT PP.

This also begs the question, is it better to go 35 or 30 if you don't have PP?
Is it better to go 35 or 30 if you do have PP?

 

[Skye]

https://www.1010tires.com/Tools/Tire-Size-Calculator

https://www.tyresizecalculator.com/charts/tire-width-for-a-wheel-rim-size-chart

I refer to these two sites often.

Regarding tire circumference, one measurement I've read of often is the 3% rule: in-general, it's best to keep the previous (say, factory) and new sets' circumferences within 3% of one another. Reason: the car is setup a certain way, both physically and logically. Deviating too far can leave the car to interpret you're driving at a markedly higher or lower speed, impacting things like braking (ABS) or shift points.

Can you deviate from the rule? Yes. People can and do. Everything has a limit and there are a lot of variables at play. There's some wiggle room before becoming noticeable; it's going to be different for everyone. One good source of insight is discussions like this. Another, the wheel vendor, for their direct experience with product testing and the clients that purchase product.

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