[MarkP80]

No, people have never opted not to fit the OEM Potenzas that came on the Mk7 for more expensive PS3/4/5's, Eagle F1's or Conti PC's... never seen that on here 🤥

I'm not familiar with mk7 tyres. I can understand fitting a more expensive tyre, but is that in a different to standard size on the mk7 as well?

 

[AMc]

No, OEM spec, i.e. 205/40

 

[Jules59]

I'm not making any 'assumption', I'm making an observation- when people are hungry to change tyre size, it is all so often that the 'alternative' one is also cheaper.
I'm not sure if that is just a stunningly amazing coincidence.

You may be right but not in my case.
I needed new tyres and I decided upon wider tyres because the wheel rims were getting trashed as 205 tyres offered no protection. Also the 205 tyres didn't look right to me ie the wheel stuck out more than the tyre (but that's a personal thing obviously). The new tyres had to be A rated for wet braking and have a good reputation.
Surprisingly there was a considerable saving with the ones I bought but that was not my reason for choosing.
As it turned there were also small but noticeable improvements to the way the car behaved which appealed to me but maybe not to others.
All in all I'm happy with my choice and would recommend it to other ST owners.
And yes my insurers are aware.

 

[FiST]

How's everyone going with the 225/40/18 tyre size? Has anyone gone from a the stock 205 PS4 to a 225 PS4/PS5?

 

[Jules59]

How's everyone going with the 225/40/18 tyre size? Has anyone gone from a the stock 205 PS4 to a 225 PS4/PS5?

No, I'm on Goodyear Eagle F1 Asymmetric 6 and I'm very happy with them..

The original reason for going to wider tyres when the OEM had worn out was that I was really irritated at just how easy it was to kerb the wheels. It was just the fronts initially but then my daughter did the rears too, on a trip over from Australia - living in the bush and driving a "Ute", she had lost her tight parking skills.
Luckily I had taken out Ford wheel insurance when I bought the car and a company called DWV came out and were able to make really good repairs to all four wheels, took about 5 hours - so it looks pretty good now. Worked out much cheaper than buying new wheels.

I dropped the pressure down from the the OEM spec for obvious reasons but the fitting garage didnt have a recommended tyrte pressure.
But using this website Tire Pressure Calculator (tiresize.com) Tire Pressure Calculator (tiresize.com) I extrapolated that the fronts should be around 2.1 bar and the rears 1.8 bar. This is a bit lower than I had originally set them so I'll see if that makes a difference that I can detect.

FWIW my insurer, LV, charged an extra £12 for having wider tyres and its noted on the policy.

 

[Xtreme Fords]

Hello everyone. Can someone be so kind as to confirm if they have fitted 225/40R18 to a MK8.5 With mud flaps? My thoughts are they don't fit! Grrrr it's annoyingly only the drivers side! (RHD) The left seems fine. That or will have to test it with one of the cheapest Chinese tyre I can find.

 

[Xtreme Fords]

Yeah, I'll be sticking to 205s.

Car has just been fully serviced, it was detailed and coated inside & out after I bought it last summer, 2020 plate (December 2020) ST Edition and relatively low miles, so I'd rather stick to by the book and keep it as it was intended!

HAHA Not to be mean but OEM DOES NOT mean better! It's usually the opposite. Thank the bean counters and annoying people! I'm an engineer so I know. Why does a Mustang GT have 255/275 tyres but the Shelby mustang 315/335‽‽.... this isn't even a mod! If you're that concerned about sticking to OEM spec, this isn't the car or forum for you

 

[ydnA]

HAHA Not to be mean but OEM DOES NOT mean better! It's usually the opposite. Thank the bean counters and annoying people! I'm an engineer so I know. Why does a Mustang GT have 255/275 tyres but the Shelby mustang 315/335‽‽.... this isn't even a mod! If you're that concerned about sticking to OEM spec, this isn't the car or forum for you

Not everyone likes to, or wants to modify their car but that shouldn’t mean they’re unwelcome in an owners club.

Evidently you want to modify your car - great. You’re welcome here

Joe Bloggs doesn’t want to modify his car - great. He’s also welcome here.
I don’t particularly want to modify my car heavily, it’ll no doubt stay stock power wise but visual mods? Probably yes.


Don’t get why you’ve made the comment that an ST or this forum isn’t for someone when they want to keep their car how it came as standard. 🤷🏻‍♂️ Maybe this isn’t the place for you with that attitude

 

[Xtreme Fords]

Not everyone likes to, or wants to modify their car but that shouldn’t mean they’re unwelcome in an owners club.

Evidently you want to modify your car - great. You’re welcome here

Joe Bloggs doesn’t want to modify his car - great. He’s also welcome here.
I don’t particularly want to modify my car heavily, it’ll no doubt stay stock power wise but visual mods? Probably yes.


Don’t get why you’ve made the comment that an ST or this forum isn’t for someone when they want to keep their car how it came as standard. 🤷🏻‍♂️ Maybe this isn’t the place for you with that attitude

Well it is filed under "technical handbook" for the MK8 ST. It would be pointless knowledge if you just want to take it to the dealer and keep it stock spec. I'm running M260 on my MK8.5 ... it's rather crap tbh. I'd much rather a custom dyno tune as below 3,000 RPM it's still stock. But due to fiesta 4 stud wheels and how most dyno are for RWD cars, it's not possible to do. So how is this info useful to someone not wanting mods?
But I see what you're saying! Honestly I do but anyone thinking OEM is best is a moron. It's all optimization for them end of the day usually against price! Like why not charge $10k more and give it AWD with fully locked out transfer case / centre diff?? Business case!

 

[AMc]

Okay, I think you are being a tad extreme with your opinions there. Calling others morons for wanting OEM spec is a bit OTT. For some it comes down to maintaining warranty or complying with their insurance policies.

You do you, let them do them.

 

[Xtreme Fords]

Okay, I think you are being a tad extreme with your opinions there. Calling others morons for wanting OEM spec is a bit OTT. For some it comes down to maintaining warranty or complying with their insurance policies.

You do you, let them do them.

Fair enough. Lucky here modifying cars don't void insurance. As for warranty, yeah I can't be bothered about that. They always try to get out of it anyway hence my car was literally modified on day 1 (went from dealers to workshop on a flat bed) and why there aren't many threads relating to mk8.5. Don't mind me, I have even modified my "work" car with fatter tyres etc (Kia Stinger have 225 fronts on a 8j wheel pfft) bye bye crappy OEM spec

- YouTube

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

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[Tsotsi8787]

Fair enough. Lucky here modifying cars don't void insurance. As for warranty, yeah I can't be bothered about that. They always try to get out of it anyway hence my car was literally modified on day 1 (went from dealers to workshop on a flat bed) and why there aren't many threads relating to mk8.5. Don't mind me, I have even modified my "work" car with fatter tyres etc (Kia Stinger have 225 fronts on a 8j wheel pfft) bye bye crappy OEM spec

- YouTube

Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

youtube.com

I can only assume there aren't many specific threads to the 8.5 as it is pretty much the same car and so, it would just lead to duplicate results. Hit up the search bar, there is a wealth of information on here regarding the mk8, which will answer a great deal of your queries for the mk8.5.

 

[Xtreme Fords]

I can only assume there aren't many specific threads to the 8.5 as it is pretty much the same car and so, it would just lead to duplicate results. Hit up the search bar, there is a wealth of information on here regarding the mk8, which will answer a great deal of your queries for the mk8.5.

Thanks for the tip. I have done that but no one can confirm if the 225 will fit on the mk8.5 guess I'll be the guinea pigs and them advise all you guys and gals.
Totally off topic, but just FYI ... The torque mounts ARE different. The MK8.5 has a wider rear bit.

 

[AMc]

There are a few threads on the 8.5, but it's quite new on the block, compared to the 8 that's been out a few years already. 8.5's are slow to be delivered at the moment too, meaning even less of them around.

With regards to the threads and sub forums, the Mk8 section is for the 8.5 too, just like the Mk7 is for 7.5 and Mk6 for 6.5...

 

[Tsotsi8787]

Thanks for the tip. I have done that but no one can confirm if the 225 will fit on the mk8.5 guess I'll be the guinea pigs and them advise all you guys and gals.
Totally off topic, but just FYI ... The torque mounts ARE different. The MK8.5 has a wider rear bit.

Yep, I'm aware that's different as I have read the numerous threads. Hence, pretty much the same.

Why wouldn't a 225 fit on the mk8.5? What is different in that area of the car that you seem to be aware of?

Both the mk8 & mk8.5 ST3 alloy are the same dimensions, 7 x 18", offset 42.5, for 205/40/18.

Also, I imagine not many folk with an 8.5 have eaten through their standard 205s yet, so I would doubt anyone would prematurely remove the 205 to fit a 225.

 

[Tsotsi8787]

@Xtreme Fords, here you go, found on Facebook for you.

 

[Dragunov]

Here in Belgium the MOT will give a no-go with such size

 

[Xtreme Fords]

@Xtreme Fords, here you go, found on Facebook for you.

View attachment 592527

Thanks a bunch mate. I really appreciate it. If you see the photo, look at the wheel well clearances vs a MK8. It's a lot tighter. I've bought Mountune MK8 Mudflaps to fit to the MK8.5 and they annoying rubbed! So we binned their brackets and bolted it to the car directly. This rubbing only for the RHS mid way to full lock. Annoyingly full lock was fine. And only turning right. So I'd say with the mudflaps in the way, it may rub. Fitting is 100% possible as the dampers etc are all far away enough. Fitting without rubbing is the question.

 

[Wetherfell]

Just came across this thread which I found very interesting and reinforced my (completely unscientific) first impressions.

When I picked up my Mk 8.5 a couple of months back, my attention was soon drawn to the wheels/tyres which just didn't look "right" to me - like someone had stretched an undersized tyre onto a wider rim - to the extent that I double checked the specifications.

They also leave the rims looking horribly vulnerable to parking scrapes and pothole damage.

I had 205/45x17 PS4s on my ST- L which protected the rims pretty well - I might have been exceptionally lucky but sustained no damage in 5 years despite the roads round here being more potholes than tarmac. Can't see me repeating the trick with this car!😃

 

[Xtreme Fords]

Just came across this thread which I found very interesting and reinforced my (completely unscientific) first impressions.

When I picked up my Mk 8.5 a couple of months back, my attention was soon drawn to the wheels/tyres which just didn't look "right" to me - like someone had stretched an undersized tyre onto a wider rim - to the extent that I double checked the specifications.

They also leave the rims looking horribly vulnerable to parking scrapes and pothole damage.

I had 205/45x17 PS4s on my ST- L which protected the rims pretty well - I might have been exceptionally lucky but sustained no damage in 5 years despite the roads round here being more potholes than tarmac. Can't see me repeating the trick with this car!😃

Agreed! Go for the 225s for sure. Ignore the OEM fanboys. 225 even put your speedo right and give it a lowered look. Only issue is the mudflaps maybe