Tyre size advice please

[Alex]

Falken Azenis FK510 all round. Cheap and stick like glue.

 

[911munKy]

I'm running 295 wide FK510 on the rear and I'm also very happy with them.

When i fitted M030 and Conti SC2 in 295 I had body tyre contact with 15mm wheel spacers i needed to roll the arches, without the spacers you'll have plenty of room.

 

[v6toj]

I'm running 295 wide FK510 on the rear and I'm also very happy with them.

When i fitted M030 and Conti SC2 in 295 I had body tyre contact with 15mm wheel spacers i needed to roll the arches, without the spacers you'll have plenty of room.

Cheers but I should have mentioned wheels do sit wide as they are et45 on rears. Tried to upload pic but no joy.

 

[911munKy]

You may have possible contact issues then as mine is at 10" ET65 with 15mm spacers so the equivalent of ET50. I also think part of my contact problem was that my car had minimal negative camber on the rear so I could have altered that before rolling the arches to see if it helped.

Mind you I bought an arch roller for about £50 and modified it to fit a 996, rolled the arches on a scorching hot day and used a heat gun and all was fine, really easy to do.

 

[v6toj]

Cheers for that info, I think that is my worry as ET45 is equivalent of 20mm spacers. Good to hear rolling arches is easier than I thought though. I had an e21 323i which crumbled away when arches were rolled lol. I think i'm inclined to leave the arches as they are just now hence the 275 might be a good compromise without arches being rolled on the ET45's.

 

[82DVY]

My 2 pence worth. Not sure why you have negative views of your 235 / 275 PS4 combo. Seems like a nice idea.

A 295 section tyre on a 300bhp car seems more for vanity than sanity. After all a hot hatch puts that power through a 235 section in fwd format.

 

[Alex]

The difference between 275 and 295 will be 10mm. But you're looking at a higher profile with the 275 aren't you? So whats the difference radially?

 

[911munKy]

Surely 20mm?

 

[Alex]

Surely 20mm?

Overall yes, but the OP is concerned about clearance between tyre and wheel arch. Tyre would be 10mm per side, so 10mm at point of concern.

 

[Alex]

A 295 section tyre on a 300bhp car seems more for vanity than sanity. After all a hot hatch puts that power through a 235 section in fwd format.

I think there maybe a few other things to consider. EG. Hang the engine of a front wheel drive behind the rear wheels and take all the weight out the front and see how that works for grip.

 

[v6toj]

The difference between 275 and 295 will be 10mm. But you're looking at a higher profile with the 275 aren't you? So whats the difference radially?

https://www.tyresave.co.uk/tyre-size-calculator/

Figures from the calculator seem to suggest 235/40 and 275/35 quite a good combo with a difference in diameter of 0.78% (well within 2.5% recommended max) which is actual 5mm. Can get Michelin PS4 tyres for £510 including £60 discount for 4 purchased via Camskills. Alternatives are Falken FK510 at £557 or Dunlop Sportmaxx RT2 at £491. Tempted with the Michelins due to newer technology.

 

[Alex]

Price of those Falkens is dear. Mine come in under 500 fitted.

 

[v6toj]

Price of those Falkens is dear. Mine come in under 500 fitted.

Where did you buy from Alex?

 

[Alex]

The local tyre place near where I work. They're a stockist for Falken and as well as balancing and fitting you get free accidental damage warranty with them:

https://www.balderstonetyres.co.uk/

Have a look on Falken's website and search for your nearest stockist:

https://www.falkentyre.com/en/service/dealer-locator

You might find the sizes you want are dearer due to being a less popular tyre. Double check the Falkens you look at are the FK510.

:thumbs:

 

[v6toj]

Cheers Alex 👍