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Tyre width

Roy

By Roy,
in Engines & Forced Induction

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Roy Grand Master

Roy

Posted
Posted

My car currently runs 215/45/17 on the front, and 235/45/17 on the rear. My rims are 17x7 front, and 17x8 rear.

Im of the understanding that i could fit 215s all round, but is there any tyre performance issues other then those associated with reduced surface area, that would stop you putting a 215 on an 8" rim?

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Al Grand Master

Al

Posted
Posted

That's a first!! I never heard of anyone wanting to go smaller in the rears.

I have F:245/35/19 and R:275/30/19. Have had no problems and just some minor rubbing of the plastic gaurd insert, as i turn up drive-ways. But the car does have a set of Tein suspension, which are relatively stiff.

PS: Gaurds have NOT been lipped, as i am not prepared to respray the car when the paint cracks.

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Roy Grand Master

Roy

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Reason for wanting to go 215s all round was firstly im able to get some R compund track tyres for good $$$, but they are 215.

The guards on my R32 have been rolled and still anything wider then 235 on the rear rubs, and anything wider then 215s on front rubs.

I have had a set of work rims on the car with different offset that allowed 255 on rear and 235 on front without rubbing, but the 255s sat outside the rear guards, looked too 13B drag Corolla for my liking.

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Sydneykid Grand Master

Sydneykid

Posted
Posted

Hi Guys, tyre sizes do vary between brands, even the same brand has anomalies. We have 235/40/17 Yokohama A032R's on the front that are 239mm wide and 245/45/17 on the rear which are 243 mm wide. So 235 versus 245 should be 10 mm wider, but they are only 4 mm wider.

Oils ain't oils, Sol.

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PuppaDuck Collaborator

PuppaDuck

Posted
Posted

I have 235/40/17 on the front and 255/40/17 on the rear...

I have noticed that the front tyres wear unevenly now...

The inside 1 inch wearing bald while the majority of the tyres are chunky as...

Anyone else getting this ?

I am told that sometimes Skylines do this, or that wide tyres cause this...

Also finding that the guard-liners are wearing against the front tyres somehow...

Thing is, I've had it for years and its only started doing this in the last year...and I can't figure out if it is worn suspension or my driving on corners...

The initial indicator I noticed in the area was that the guard liners pop to the outside of the guard lip, and I have to sometimes push them back in behind them...

I'm interested to find if others have any similar signs...

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Roy Grand Master

Roy

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Last time i got a wheel alignment i started going thru front tyres...too much camber.

Didnt notice any difference either by feel, lap times, or in consistancy so have dropped some camber out of the front. Tyres seem to be wearing better now.

You R33 owners are spoilt, just like my friend in his 200SX, your guards swallow 18s, even 19s, or nice and wide 17s.

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Al Grand Master

Al

Posted
Posted
Originally posted by Roy

You R33 owners are spoilt, just like my friend in his 200SX, your guards swallow 18s, even 19s, or  nice and wide 17s.

What you mean OR, i have the best of both: 19" x 8" rims all round with F:245/35/19 and R:275/30/19. :D :shake: :) :shake:

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Sydneykid Grand Master

Sydneykid

Posted
Posted

Hi PuppaDuck, tyres wearing on inside = too much negative camber or incorrect toe settings. Puting wider (or narrower) tyres on should not affect the suspension geometry. Either way have it checked. Toe should be set at zero or slightly toe out. Camber is a little more tricky as it depends on your driving style. Anything more than 1 degree negative on a road car can be a problem.

If you like the handling feel of negative camber, try more caster instead. All of the advantages, but no increase in inside tyre wear.

Hope that helps.

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PuppaDuck Collaborator

PuppaDuck

Posted
Posted

Thanks SydneyKid...

I'll put this to the next guy I go to for a wheel alignment...

I have no personal choice nor do I know what to ask for...

But if I can get front tyres to last longer than a year by wearing even then I'll be happy...

Maybe he was put off by not knowing what settings to put it on cause the R33 isn't in his book...or perhaps he wasn't sure about the HICAS...

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Sydneykid Grand Master

Sydneykid

Posted
Posted

Hi PuppaDuck, since HICAS is rear steering I have no idea why that would effect what he thinks should go on the front. I'd find a better wheel alignment shop. We use Whiteline (Wedge) at Minto or Heasmans (Doug) at Sydenham. East Coast are also OK.

The "local tyre shop" is generally a waste of time.

Hope that helps.

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