Largest rear tire that can fit on a 2025 GT Mach E

[Johnny_b]

I so much appreciate you taking the time out to write a fully detailed response, which is amazing. I can only thank you so much for all the information. I’m gonna have to read through it to understand it a little better but yes, the pictures illustrated or exactly what I want and the tire sizes as well. I just need to find a rim that I can get in bronze that is forged at a reasonable price. I just don’t wanna spend four grand for a set of rims.

Thanks again I really do appreciate it.

Sponsored

 

[markboris]

I so much appreciate you taking the time out to write a fully detailed response, which is amazing. I can only thank you so much for all the information. I’m gonna have to read through it to understand it a little better but yes, the pictures illustrated or exactly what I want and the tire sizes as well. I just need to find a rim that I can get in bronze that is forged at a reasonable price. I just don’t wanna spend four grand for a set of rims.

Thanks again I really do appreciate it.

Did you check out Atomic Wheels? Do they offer Bronze as a color choice?

 

[Atomic Wheels]

Did you check out Atomic Wheels? Do they offer Bronze as a color choice?

Hi! We offer bronze as a custom order option in any of our designs! It can be made in whichever design you prefer.

 

[Johnny_b]

Did you check out Atomic Wheels? Do they offer Bronze as a color choice?

I haven’t yet.

 

[Johnny_b]

Hello There,
Is there any solution that keeps the overall diameter of the tire the same as the factory just so I can get the same range without sacrificing handling? when I was reading to your response, which I do appreciate, thank you it basically said you could have to go with a lower profile tire that would stiff in the ride or go with the taller sidewall tire that would sacrifice a little bit of the handling as well as the efficiency is there a compromise maybe going to a different size rim like a 21 that the Tesla use? Thanks for the wheel recommendation as well. I think I’d be happy with just a 295 in the back and at 2:55 in the front if I can keep the same height if I go to a different with tire like a 285 in the back and a 255 in the front would that keep the same overall height diameter?

I assume you are going for width and not height on the tires, correct? If so, 255/45's are the widest recommend for an 8" wheel. Now, I have seen people go one size up or down from the recommended so 265's would probably be ok but not sure what you would gain if the tire is not completely flat on the road because of not being on the proper size wheel.

As far as spacers go, with the OEM 8" wheels, you would not need a spacer on the rear no matter what size tire you put on even if it was a 275 (highly not recommended on an 8" wheel though). Now on the front, with the OEM 8" wheel having a 47.5 offset, 255's would fit without needed a spacer. If you went with 265's, the inner tire sidewall would be right up against the strut so a thin 3mm spacer on the existing hub would be enough to keep it from rubbing against the strut.

I have aftermarket wheels and runs 275's on the front with 9.5" ET40 wheels. Rear you can run much wider up to 315's on an 11" wheel if you don't mind a bit of a poke, otherwise 295's is the widest I would go. I have run those sizes on several Mach-E's.

Did in have to redrill your wheels to fit 5x108? 63.4 mm

 

[Johnny_b]

I want to get my wheels ordered and have a few question.

1. Mark he mentioned that you’re running GT40, Is that an Apex rim? If so they said they don’t have a wheel that fits the Mach E. Is there one they sell that can me modified? I do like there wheels and make here in the US.
2. Mark I would like to run a 265 in the from and 295 on the back. I really don’t want to do any cutting and ok will them sitting in a little without the poke. I’m good with staggered and if I need to go down to a 255 for front that’s fine as well. Prefer not to have to cut any of the car if necessary. Do want to run 20” and I don’t want to lower the car. What would be the ideal offset for front and rear. Some of the manufacturers like Savini SV don’t make half sizes on some of there models. Atomic will I believe make any size and any combination and any style to match other brands like Apex. I would like to go with forged and spend the money and get a good quality wheel like when others are running.
3. What would everyone recommend on something similar as a ET40 if I can’t get those? Have other ordered from Atomic with a good experience? It’s a 8 to 10 week process solve they are make in china.
4. If there is anyone out there who can recommend a tire and wheel place I’m good buying through a retailer to save hassle. I’m just not that familiar with car wheels since I’m a truck guy and I usually use icon for my stuff.

Just want to make sure I get the correct offset/back spacing so I don’t run into issue when getting custom wheels made.



Mark your article that you wrote I read through and there’s some amazing information in there which is great unfortunately I don’t understand a lot of of it, but it’s still fantastic and very detailed orientated.



I would prefer not too mess with camper unless it’s necessary to get the wheels to fit. I’m I’m OK with it, but I’m more looking at some performance with the upgrade but also the look at the car is what my biggest thing is.



appreciate all the information from everybody, thank you so much.

 

[rreddy3]

Atomic AWZZ, 8.5 x 20, oem 47.5mm offset, 245/45x20 Pirelli P Zero A/S Plus 3, Eibach F and R antiroll bars, front camber adjustment bolts, on 23.5 Premium trim. Not the fastest or best handling Mach E around, but it makes me smile every time I drive it and that’s what counts! The Atomic wheels are excellent quality qnd finish.

 

[markboris]

I want to get my wheels ordered and have a few question.

1. Mark he mentioned that you’re running GT40, Is that an Apex rim? If so they said they don’t have a wheel that fits the Mach E. Is there one they sell that can me modified? I do like there wheels and make here in the US.
2. Mark I would like to run a 265 in the from and 295 on the back. I really don’t want to do any cutting and ok will them sitting in a little without the poke. I’m good with staggered and if I need to go down to a 255 for front that’s fine as well. Prefer not to have to cut any of the car if necessary. Do want to run 20” and I don’t want to lower the car. What would be the ideal offset for front and rear. Some of the manufacturers like Savini SV don’t make half sizes on some of there models. Atomic will I believe make any size and any combination and any style to match other brands like Apex. I would like to go with forged and spend the money and get a good quality wheel like when others are running.
3. What would everyone recommend on something similar as a ET40 if I can’t get those? Have other ordered from Atomic with a good experience? It’s a 8 to 10 week process solve they are make in china.
4. If there is anyone out there who can recommend a tire and wheel place I’m good buying through a retailer to save hassle. I’m just not that familiar with car wheels since I’m a truck guy and I usually use icon for my stuff.

Just want to make sure I get the correct offset/back spacing so I don’t run into issue when getting custom wheels made.



Mark your article that you wrote I read through and there’s some amazing information in there which is great unfortunately I don’t understand a lot of of it, but it’s still fantastic and very detailed orientated.



I would prefer not too mess with camper unless it’s necessary to get the wheels to fit. I’m I’m OK with it, but I’m more looking at some performance with the upgrade but also the look at the car is what my biggest thing is.



appreciate all the information from everybody, thank you so much.

Hey John, I will try to answer your questions (again).

1. Right now I am running a square setup with 275's all the way around and the wheel is a Signature SV701 21x9.5 ET40. I am going to go back to a staggered setup but have not decided exactly what sizes yet. None of this really has to do with your questions but was just letting you know.

2. Ok, so you want to run a staggered setup of 265's in the front and 295's in the rear. I explained this thoroughly in the 15th post of this thread ( #15 ) but will go over it again briefly here. The specs are as follows: in front the wheels are 20x9 ET34 with 256/45R20 tires and in the rear the wheels are 20x10.5 ET45 with 295/40R20 tires. You will not have to trim, cut or modify any part of the car to make this setup fit. I have run this setup many times on several different Mach-E's and currently there are several other members here that are running the same setup.

3. Atomic wheels are very good and they will make them to any specification you want. I would pick out a set and have the make them to the wheel specs I listed above. Yes it takes 8-10 weeks but custom sized wheels usually do take longer but when you want a staggered setup you need to go with custom specs to get the fitment correct.

4. Once you get the customer wheels from Atomic, you want to take them to a reputable tire shop to purchase your tires and then have them installed and balanced on your Atomic wheels. I suggest that you have your car alighted after getting your new wheel/tires on. It is not required but it is highly recommended because you want to make sure your alignment is within spec especially after spending all this money on new tires and wheels.

5. What tires are you thinking about getting? If you need recommendations of brand or type, let me know what is your top two requirements are for tires and I can help you out.

Mark

 

[markboris]

Atomic AWZZ, 8.5 x 20, oem 47.5mm offset, 245/45x20 Pirelli P Zero A/S Plus 3, Eibach F and R antiroll bars, front camber adjustment bolts, on 23.5 Premium trim. Not the fastest or best handling Mach E around, but it makes me smile every time I drive it and that’s what counts! The Atomic wheels are excellent quality qnd finish.

Those wheels look great on your car Richard and with the Eibach sway bars, your car handles much better than any stock Mach-E for sure not to mention rides a bit better. Like that rear spoiler.

 

[rreddy3]

Those wheels look great on your car Richard and with the Eibach sway bars, your car handles much better than any stock Mach-E for sure not to mention rides a bit better. Like that rear spoiler.

Thanks Mark. As you, Steve, and others have noted, the Eibach anti roll bars absolutely transform the car. It’s more poised, more “fluid” in its movement, it feels lighter on its feet. It’s just better in every way. Until you experience the difference they make, it’s hard to believe. It is certainly an additional expense, but I think anyone considering wheel/tire changes as a performance enhancement would be well served to also make the change to the Eibachs.

The spoiler, lip splitter and defuser are all Air Design/ Ford Accessory items I installed. Quality is top notch. I’m not at all sure they have any aero benefits, but to my eye they’re more icing on the cake.

 

[Johnny_b]

Mark thanks for the info! It’s when I saw the model number that matched a Apex wheel it was confusing me.

Wheel size sounds prefect. Have not picked tires yet. Would like to run something that will last a little longer then a softer compound

Lastly the back spacing for the 9 front and 10.5 for the rear? Just so I get is right when ordering today.

You’re posting said 45 rear off set and between 32 to 40 in the front, 32 in the front to matches the back I believe is how I interpreted your post. Really don’t want poke just having the rims flush with the inside fender lip and if need to make small camber adjustments as necessary.

If I run a 10 in the rear can it hold a 295 or is that too much. Just wanted to keep
my options open for tire selection if want to back down to a 285 in the rear.



Thank you. Sorry to have so many questions.

 

[markboris]

Mark thanks for the info! It’s when I saw the model number that matched a Apex wheel it was confusing me.

Wheel size sounds prefect. Have not picked tires yet. Would like to run something that will last a little longer then a softer compound

Lastly the back spacing for the 9 front and 10.5 for the rear? Just so I get is right when ordering today.

You’re posting said 45 rear off set and between 32 to 40 in the front, 32 in the front to matches the back I believe is how I interpreted your post. Really don’t want poke just having the rims flush with the inside fender lip and if need to make small camber adjustments as necessary.

If I run a 10 in the rear can it hold a 295 or is that too much. Just wanted to keep
my options open for tire selection if want to back down to a 285 in the rear.



Thank you. Sorry to have so many questions.

Ok, now I get why you were mentioning the Apex wheels.

I have no idea what the backspacing is of the wheels because that is a measurement I don't use when ordering my custom wheels. I only use offset and that is the only other measurement besides the wheel diameter and width that the manufacture wants to know.

Yes, in the rear if you are going with either 20x10.5 or 20x10, you want a 45 offset. That will give you the clearance so the backside of the tire does not contact any suspension parts. In the front, you want to go with an offset of around 34 so the front tires that are on a narrower wheel (20x9 or 20x8.5) will match the flushness of the rear tires. If you want the fronts to be inset a bit more than the rears, you can go with an offset of 40 but not more than that.

You absolutely can run a 295 tire on a 10" wheel wide wheel but I would not go any narrower than that. If you do, I would run the 265's up front on an 8.5" wheels just to keep the sidewalls profiles as similar as you can. So, either 20x8.5 / 20x10 or 20x9 / 20.10.5

 

[Johnny_b]

Thanks Mark!
Last question. And sorry to waste you time.
Just want to get this right and not make a mistake on custom wheels that will take 10 weeks to get I would like to have the tires not poke out pass the fender. Would like them to sit just in side the face over lined up to the inter fender return lib. Just don't want rocks and road stuff hitting the outer fender causing damage. My truck wheels do this so had to add fender flares which I do not want to do since the car is fully color matched. So is the back spacing recommend set the wheels in? 45 rear and 34 front. Or since these are fully custom and I can make what ever I want go in a few in the back to 47 and 36 front still clearing using a 295 back and 265 front?

Thank for all the help on this!

 

[markboris]

Thanks Mark!
Last question. And sorry to waste you time.
Just want to get this right and not make a mistake on custom wheels that will take 10 weeks to get I would like to have the tires not poke out pass the fender. Would like them to sit just in side the face over lined up to the inter fender return lib. Just don't want rocks and road stuff hitting the outer fender causing damage. My truck wheels do this so had to add fender flares which I do not want to do since the car is fully color matched. So is the back spacing recommend set the wheels in? 45 rear and 34 front. Or since these are fully custom and I can make what ever I want go in a few in the back to 47 and 36 front still clearing using a 295 back and 265 front?

Thank for all the help on this!

John, you are not wasting my time.

In an earlier post, you said you did not mind a little poke. Now you don't want any poke? With 295's on the back, you will get a very slight poke. To minimize that and make it flush, you should go with 10" wide wheels instead of 10.5" and make the offset 47 instead of 45. That is about the best you can do so that the back sidewall of the tire will not come in contact with the suspension however it may contact the fiber fender liner which is not a big deal at all. Everyone here that is running 295's has a slight wear mark on that fiber liner.

As far as the front's go, if you want them to match the flushness of the rears, then change the wheel width from 9 to 8.5" and but keep the offset at 34. However if you want to bring them in further than the back so that you can reduce the amount of road debris spray along the side of the front doors, then you can run an offset of 40. They will sit back in about 3/8" more than the rears. Nothing wrong with that.

Something else to be aware of, tires of the same size from different manufactures all have various widths. Let's take the 265/45R20 and 295/40R20 tire sizes you are going to run. The Pirelli Scorpion Zero AS Plus 3 265's are 8.4", 295's are 9.6". The Michelin Pilot Sport 4 SUV 265's are 9", 295's are 10.2". The Continental CrossContact RX 265's are 8.8", 295's are 9.9". Goodyear Eagle Touring 265's are 8.7", 295's are 10.1. I mention this because on the same exact tire size, with one manufacturer your tires will sit flush but with another manufacturer they might have a slight poke or inset.

Then there is your camber adjustment. Adjusting the camber just .5˚ can make the difference between flush, poke or inset. All depends on how picky you are about all of this.

When we talk about tires being flush with the fender, this is only a measurement taken at the top of the fender trim and dead center of the tire. From there down, the tire will always start to poke out because the fender curves in towards the body. You can never have the entire tire set in from the entire fender on a Mach-E. I will post some photos below so you can visualize this.

Right now I am running a square setup of 275/40R21's (next month I will be back to a staggered setup). All four of my outer tire sidewalls are flush with the top fender trim.

You need to use a straight, flat item and make sure it is touching the tire sidewall at the bottom on the ground and the fender trim at the top above the tire. The top of the tire sidewall on mine is flush with the top fender trim both front and rear.

From this angle the front tire may look like it is poking out at the top

But it is flush from top to bottom

Rear tire is also flush

Rear view

Let me know if you have anymore questions.

 

[Johnny_b]

MARK, sorry didn’t get back to you sooner. I do appreciate you following up with the post earlier. All information is incredible. I think I’ve got it. I hope at least lol. I’m gonna follow I believe the 8.5/10 combo for wheel width and your recommendation for the backspace. i’ll probably select the narrower of the tire selections that you recommended as your comment about they will vary between manufactured to manufacture. Think I’ll probably end up putting mud guards front and back. I saw there was a posting somewhere for a link, but I need to try to find that again. i’m working with Santiago at atomic currently trying to nail down a design so I can get them ordered Mark again thank you so much for all the help. I do appreciate it.

Sponsored