Tyres 275/30 or 255/35

[GarethRS]

Hi guys,

Not posted for a while, been busy with the house for the last 12 months.

Anyway, my 6 is currently in hibernation and whilst sleeping, it's MOT has expired.

I need 1 tyre and the others are "okay" ish, prob about 4-5 mm.

I've decided to replace all 4 with VREDESTEIN ULTRAC SESSANTA and then sell my existing Pilot Sports on FleaBay. Question is, what size do I put on?
I've read from a few people on here that they are running 275/30 thus giving slightly better protection against the dreaded curbing!.

Also, all my TPMS batteries are flat. Do I replace them all for £300+ or save the cash and leave them disabled like I have for the last two years? It's quite a bit of hassle, as i'll need to get the car completely off the ground, get the tyres removed, replace the units and then have the new tyres put on. Hmm, not sure it's worth it tbh!

Thoughts?

[Shoppinit]

You're going from PS2 to vreds? Interesting.

I replaced my TPMS - well, I've bought them. I will fit them after the wheels have been refurbed. I hate being without them. Can't stand that something on the car isn't working as it should. Also, I would like to be informed if I started losing pressure at silly speeds. I suppose that's what they are there for.

[GarethRS]

Hi Shoppit, long time, no speak.

Well, i'm not 100% on the vred's, but I’ve been researching it for probably over 8 months now and the consensus is that are quite good. I'm open to suggestions!.

I agree about not working, but in the 2 years i've had the car, i've never had a problem with low pressures in the tyres. Mind you, if i'd already brought them, i'd fit them.

I'm in the process of removing the wiper mechanism as it's seized, its a bit of a s0d!.

[GarethRS]

Thinking. Maybe i will go that extra mile and replace them.

Did you get them from the usual place that people talk about on here?

[rossi46]

Hi Gareth
Not having had to replace the (Bridgestone) tyres that are on mine, I can't really comment on others in terms of performance,however I'm not sure that the 275's would offer you greater protection to your wheel rims....If the tyres are more stretched (than the standard 255's) , the risk of kerbing would increase. IMHO, the 30 profile tyre also makes the car look at little 'under-tyred' - I think the 35's suit it much better.

Re the sensors, I guess a big part of having them functioning properly is to make you aware of pressure issues at higher speeds when the earliest possible sign of a problem is paramount

Rgds

[Shoppinit]

Hi Gareth, wondered what you were up to

If you can stretch to it, then replace the TPMS. Alloywheelsdirect seem to do the best deals.

As for the tyres, you'll have to make your own mind up. When mooch went from GYF1 to the vreds he hated them, called them dangerous and sold them after 500 miles. But then others rave about them. I wouldn't bother with the odd size. Can't see the point.

[Mr Footlong]

Are you on the standard 19" alloys currently and are you on DRC or have you been lowered?

I am on9.5x19" 5x112 ET30 Oz wheels and have 4 275/30/19 96Y XL Michelin Pilot Super Sport tyres along with PSS9's that are lowered and have perhaps 1-1.5" gap between the tyres and the arches. Scuff city between the outer edges of the tyres and the arches currently over a lot of ruts & bumps in the road. I am going to most likely be raising the ride height because of this.

[GarethRS]

Hi,

I have standard rim's but I have KW's. Not sure on the height as it was done before I purchased the car, but it looks slighly lower.

[Daveperc]

If you are on standard rims you can go with either of the above sizes, but you need to make sure (either size) that you are clear of the "Knobbly bit" (or grind it off).

Suspension makes no difference to the tyre fit.

Dave

[Mr Footlong]

Suspension makes no difference to the tyre fit.

Beg to differ but it does if with the width of tyres you are running means that you are borderline outside of your arches. This means that you have to be careful about the ride height/amount of suspension travel in order to avoid rubbing without modifying the arches. Removing the knobbly bit is an absolute must is you are entertaining 275's and don't want to research it via the threads on here or take the gamble

[bam_bam]

Suspension makes no difference to the tyre fit.

Beg to differ but it does if with the width of tyres you are running means that you are borderline outside of your arches. This means that you have to be careful about the ride height/amount of suspension travel in order to avoid rubbing without modifying the arches. Removing the knobbly bit is an absolute must is you are entertaining 275's and don't want to research it via the threads on here or take the gamble

I think he's referring to OEM 19s (which is what the OP is on), you're on 9.5jx19 so 275s would put you closer to the arch and olde knobbly bit.

[Mr Footlong]

Sorry, I took that line as more of a general comment and replied to it as such

[Daveperc]

Well it looks as if most of the misunderstanding has already been sorted by others. OP is on OEM rims...

Re suspension - my point, probably too cryptically made, is that whether on DRC, coilies of any type etc, the basic envelope of space occupied by the wheel at different elevations is the same - you may operate a bit higher or lower in the envelope, but the basic geometry is fixed by the mounting points etc. OP aked if the fact he was on KW's would make any difference = answer is "no"!

You have put on wider rims I think haven't you, and I'm not sure about your offset (to lazy to look back!). Anyway, wider rims make the shoulder fatter, and offset may also be affecting clearance to the arch. Raising may make the contact less frequent, but unless you can get it high enough to hit the bumpstops before the tyre reaches the arch, you'll still get rubbing at full depression.

Hope that's clearer!!

Dave