New Plan

T

T2FFN

Senior member
 East Yorkshire
Ok, after a long exhaustive search for a set of 19's I could fall in love with...
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I've decided to pay for a top notch refurb of the ellipsoids in hyper silver and treated them to some Michelin Pilot Super Sport rubber :thumbsup:

I've gone for 225/40/18 and 245/35/18 as I didn't like the look of the 255 rubber. Always looked too fat for the rim and bulged too far past the alloy for me. Hopefully a slightly more narrow 245 will sit nicer. :D

So, just got to wait for the tyres to get delivered so I can book the refurb now.
 
haha, no pics yet, nothing has been done. The wheels are currently more bubbled and corroded than I'd care to share. The dots are suspense dots :rofl:
 
Current (and OEM I think) size is 255/35/18, so 245/35/18 is 1.11% difference. Should be fine. 60mph = 60.67mph
 
T2FFN said:
Ok, after a long exhaustive search for a set of 19's I could fall in love with...
.
.
.
.
.
.

I've decided to pay for a top notch refurb of the ellipsoids in hyper silver and treated them to some Michelin Pilot Super Sport rubber :thumbsup:

I've gone for 225/40/18 and 245/35/18 as I didn't like the look of the 255 rubber. Always looked too fat for the rim and bulged too far past the alloy for me. Hopefully a slightly more narrow 245 will sit nicer. :D

So, just got to wait for the tyres to get delivered so I can book the refurb now.
Click to expand...
So you decided against the Vred Vorti's? :o
How much are the Pilots going to set you back?

I
 
245/35 mean that you have 10mm less rubber to grip the road when hooning :poke: :lol:

Anyhoos - enough chit chat, let's see some pics 8)
 
Well, i wanted the vorti's but its difficult finding the right sizes. I have had sessantas and thought they were great, but all reviews say the PSS are in the next league, and were similar in price at £606 delivered so made sense.

However, the site i ordered from emailed to say all stock has gone and will be a few weeks until back in, so they cancelled the order. I looked around and nobody comes close to lovetyres.co.uk on price, so i'll wait until they're back in stock.

Sent from my HTC One X using Tapatalk 2
 
T2FFN said:
Well, i wanted the vorti's but its difficult finding the right sizes. I have had sessantas and thought they were great, but all reviews say the PSS are in the next league, and were similar in price at £606 delivered so made sense.

However, the site i ordered from emailed to say all stock has gone and will be a few weeks until back in, so they cancelled the order. I looked around and nobody comes close to lovetyres.co.uk on price, so i'll wait until they're back in stock.

Sent from my HTC One X using Tapatalk 2
Click to expand...
That all sounds very sensible.
I got my Vorti's fitted yesterday for 550 quid. 255 35 18 at the back and 225 40 18 on the fronts.

The fitters got the pressures wrong so have just sorted them out. I'm very happy with the way its driving now.
 
Adamski said:
245/35 mean that you have 10mm less rubber to grip the road when hooning :poke: :lol:

Anyhoos - enough chit chat, let's see some pics 8)
Click to expand...

Less rubber maybe, though that smaller rolling circumference will take at least another 2 seconds off the 0-60 time
 
So, plan B. The MPSS didn't come back into stock so got 4 x Vorti's delivered for £372!! (4 x 225/40/18)

Decided on a square set up as the 255 on the rear look too fat like they're too wide for the 8.5J rear. I'd rather have a clean looking fit from the 225s all around.

Fitting, fresh hunter alignment and hope to god I can get rid of the wheel wobble and high speed shudder. Currently only good for sub 60mph, just doesn't feel good above that. :headbang:
 
T2FFN said:
So, plan B. The MPSS didn't come back into stock so got 4 x Vorti's delivered for £372!! (4 x 225/40/18)

Decided on a square set up as the 255 on the rear look too fat like they're too wide for the 8.5J rear. I'd rather have a clean looking fit from the 225s all around.

Fitting, fresh hunter alignment and hope to god I can get rid of the wheel wobble and high speed shudder. Currently only good for sub 60mph, just doesn't feel good above that. :headbang:
Click to expand...
Hang on, won't the Hunter wheel alignment be off if you don't have the correct tyre size? Every car has it's own set up and the computer has to know which car you have with which suspension and wheel to get it right. And what about grip? You need the wider tyre to get the power down. It's seriously going to effect how much throttle you can use coming out of a corner. Are you sure you are making the right choice?!! :!:
 
I don't think it is going to affect how much throttle can be used at all and 225 on an 8.5J is a fine fitment. Actual contact patch difference is marginal, especially as 255 are visibly wider than an 8.5J rim, resulting in bulging sidewall profile, so the tyre isn't being fully utilised properly anyway.

Add to that this tyre is greatly superior compared to the 255 "Federal?" On there now, should be a good improvement.

The car is also lowered so the Hunter alignment will have to accommodate the differences this introduces, but its a case of getting the settings within or as close to optimum spec, regardless of the setup used on the car. No different to running 19's vs 17's, the geometry is just that, geometry.

Sent from my HTC One X using Tapatalk 2
 
Zeld4 said:
T2FFN said:
So, plan B. The MPSS didn't come back into stock so got 4 x Vorti's delivered for £372!! (4 x 225/40/18)

Decided on a square set up as the 255 on the rear look too fat like they're too wide for the 8.5J rear. I'd rather have a clean looking fit from the 225s all around.

Fitting, fresh hunter alignment and hope to god I can get rid of the wheel wobble and high speed shudder. Currently only good for sub 60mph, just doesn't feel good above that. :headbang:
Click to expand...
Hang on, won't the Hunter wheel alignment be off if you don't have the correct tyre size? Every car has it's own set up and the computer has to know which car you have with which suspension and wheel to get it right. And what about grip? You need the wider tyre to get the power down. It's seriously going to effect how much throttle you can use coming out of a corner. Are you sure you are making the right choice?!! :!:
Click to expand...

The stock wheels with my old 3.0 e89 were 225's and it handled the power better in most circumstances than my old 2.5si on 255's and in the wet or damp was infinitely better (dont even mention the tram lining). Im also pretty sure that the standard size on the 3.0 e85 non M Sport was 225/45/17 too
 
I don't really see how wider tyres can make much difference as the amount of rubber on the road depends on the tyre pressure. You can change the contact patch shape slightly but that is about it.

Although the tyre deformation will be fractionally altered how much difference can there be between a 255 ~ 250 x 200 patch and
245 ~ 240 x 208 patch?

or in the case of 225s ~ 220 x 227 ~

225s all round is my choice too.

Numbers are approximate - :)
 
I may be wrong about it making a lot of difference but surely wider tyres give more lateral and accelerating grip other wise why would all super cars have massive tyres?
 
Indeed the wider the tyre and also the greater the diameter, gives a larger foot print, however a larger foot print gives you less surface pressure (force x area). Thus the break away torque on the wheel is the relationship between friction factor, area, and the pressure applied to the contact surfaces.

So the real answer is having a softer tyre not necessarily wider wheels.
 
sars said:
Indeed the wider the tyre and also the greater the diameter, gives a larger foot print, however a larger foot print gives you less surface pressure (force x area). Thus the break away torque on the wheel is the relationship between friction factor, area, and the pressure applied to the contact surfaces.

So the real answer is having a softer tyre not necessarily wider wheels.
Click to expand...
That's not necessarily true. Of course it depends on how grippy a tyre is but whilst cornering, a wider tyre with the same grip (grip as in same rubber compound) as a thinner tyre will ultimately be able to take more cornering force before it looses grip because there is more tyre in contact with the tarmac.
If there is more pressure on a smaller surface then that will break away quicker surely?
And if there is more surface area the force is spread more evenly and there is more grip. Think dragster :driving:
 
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