changing wheels and tyres Superb Sedan

[brad]

Where did you get the information on the load index needing to be a minimum of 91? I want to go with 225/35/19 but I can't find any with the load index higher than 88. If I go with the 235s then it meets that load index however the speedo will be more out of whack and diameter and height will be more different than standard.

If your speedo is as optimistic as most VW product then the +10mm extra diameter will make it more accurate. I went from 205/55 to 225/55 & the speedo still reads between 2km/h to 5 km/h optimistic between 50-110km/h (compared to my Garmin GPS reading).

At a guess, 8.5" / ET57 will have the tyres scraping against the struts on the front if the factory offset on a 7.5" rim is ET46 as you will be 24mm closer to the strut. From my experience, there is usually only about 15mm maximum to play with. If you are going from 7.5 to 8.5 then you'll have to stick with ET46 as that will make the rim 13mm closer to the strut (& 13mm closer to the edge of the guard as well). If you are trying to fill the guards, ET57 will change nothing visually.

You need to check the following before committing:

• Check the tyre placard for the minimum load rating currently allowed - don't go less than this.
• Check tyre placard for maximum diameter rim fitted - don't go more than +2" over this.
• Check fitted rims for ET stamped on rim.
• Check physical clearance between rim/tyres & body or suspension
• Feed the above figures into an offset/tyre fitment calculator to make sure it all works. I have a really good one but this forum doesn't allow you to attach excell files. There are a few out there on the internet too.

[romaniac]

If your speedo is as optimistic as most VW product then the +10mm extra diameter will make it more accurate. I went from 205/55 to 225/55 & the speedo still reads between 2km/h to 5 km/h optimistic between 50-110km/h (compared to my Garmin GPS reading).

At a guess, 8.5" / ET57 will have the tyres scraping against the struts on the front if the factory offset on a 7.5" rim is ET46 as you will be 24mm closer to the strut. From my experience, there is usually only about 15mm maximum to play with. If you are going from 7.5 to 8.5 then you'll have to stick with ET46 as that will make the rim 13mm closer to the strut (& 13mm closer to the edge of the guard as well). If you are trying to fill the guards, ET57 will change nothing visually.

You need to check the following before committing:

• Check the tyre placard for the minimum load rating currently allowed - don't go less than this.
• Check tyre placard for maximum diameter rim fitted - don't go more than +2" over this.
• Check fitted rims for ET stamped on rim.
• Check physical clearance between rim/tyres & body or suspension
• Feed the above figures into an offset/tyre fitment calculator to make sure it all works. I have a really good one but this forum doesn't allow you to attach excell files. There are a few out there on the internet too.

OK, sounds like I have to swap all wheels then and get 19x8.5 ET46 all round with a 235/35/R19 tyre and load rating of 91 or greater. Didn't think this would be so hard, next time I might re think about purchasing the wheels before the car arrives!

[brad]

It's all about research.

Know what your starting point is. Know where you want to end up. Modify as knowledge increases.

[romaniac]

It's all about research.

Know what your starting point is. Know where you want to end up. Modify as knowledge increases.

It certainly makes it easier when you have knowledgeable people like this forum helping you out! Thanks guys

[pologti18t]

>>> Check the tyre placard for the minimum load rating currently allowed - don't go less than this.

In fact its illegal to do so

[romaniac]

>>> Check the tyre placard for the minimum load rating currently allowed - don't go less than this.

In fact its illegal to do so

I won't be able to check this until the car arrives unless someone has a Superb Elegance Sedan and can check it for me?

---------- Post added 18-11-2011 at 10:21 AM ---------- Previous post was 16-11-2011 at 12:05 PM ----------

Hello

Another point I need to clarify, does anyone know the stud pattern and PCD for the 2012 Skoda Superb Elegance Sedan? I've been informed that the current stud pattern on the wheels may not fit, the wheels I have got are PCD - 5/130

Thanks

[brad]

AFAIK, same as Octavia/Passat/Golf etc. 5x112.

Sorry, assumed you were on top of the most basic measurement, therefore didn't bother to mention it.

Don't forget the centrebore as well - 57.1mm IIRC

[Buller_Scott]

yeah, the stud pattern as brad mentioned is 5x112.

if you're committed to these wheels you'll have to run the car with adaptors, but then given the thickness of the adaptors it might push the wheels out such that they're sticking out past the guards, especially given that the wheels are a full inch wider than stock...

and also, spacers/adaptors are fine on a polo or a golf, but personally i wouldnt be using adaptors on a fully loaded family sedan... many will say there's nothing wrong with it, but not only may it be illegal, it'd just be a hazard i wouldnt chance...

[romaniac]

AFAIK, same as Octavia/Passat/Golf etc. 5x112.

Sorry, assumed you were on top of the most basic measurement, therefore didn't bother to mention it.

Don't forget the centrebore as well - 57.1mm IIRC

Hmm ok, I might have to rethink the wheel choice then as it may prove to be difficult to adapt them.

So just to summarise, I need 19x8.5 wheels ALL ROUND with an ET46 offset and 5x112 Stud pattern?

[brad]

To summarise, I think you need to talk to a wheel specialist rather than trying to wing-it via the forum.

Who were you buying the Porsche wheels off?

@Buller: Agree.
I've run adaptors before. They weren't an issue & I'd run them again if the circumstances were right but if my knowledge of wheels & wheel fitment were minimal then I'd avoid them like the plague.

[romaniac]

To summarise, I think you need to talk to a wheel specialist rather than trying to wing-it via the forum.

Who were you buying the Porsche wheels off?

@Buller: Agree.
I've run adaptors before. They weren't an issue & I'd run them again if the circumstances were right but if my knowledge of wheels & wheel fitment were minimal then I'd avoid them like the plague.

I've got them from ebay off a wheel supplier. They said they can change over the wheels with others that will fit my dimentions if I can give them the correct measurements I need. They said the measurements above are similar to Mercedes Benz wheels so he can send me some examples based on what I provide him.

[brad]

Which version of the Superb Sedan have you ordered? is it FWD or the AWD? (I'm assuming the offset is different between those two)

I'd just tell him it's the same as the equivalent Passat.

No point looking at Mercedes as they are RWD & IIRC the offset will be outwards (anywhere between ET18-ET50mm). Also the centrebore is usually 66.6 so you'll need some 66.6/57.1 hub rings (I run bub rings with the Audi wheels I'm using at the moment).

Truly, if they don't know what a Skoda Superb is & what wheels will fit then I'd run a mile. It isn't Tempe or St.George is it?

BTW: Have you asked them about weight? Every kg you add to a wheel increases unsprung weight. This means the suspension has to work harder. Also, the acceleration is slower & you'll use more fuel.

[Buller_Scott]

to be honest, and in trying to help, i wouldnt really be keen to get the wheels off an ebay seller who would have been willing to sell you the porsche 5x130 wheels for your skoda superb in the first place.

i dont know if you've put money down or whatever, but in a big car like the superb it'd be 5x112 all the way, with 19x8 in an offset close to stock, where possible. this might limit your wheel options but at least they will fit, and they will be safe for the occupants of the car when fully loaded.

if you havent put down any money, i would be more keen to go to somewhere like advance tyres in richmond, or else call around to somewhere like ozzy tyres / tempe tyres in sydney, who will have a good range of wheels for the 5x112 fitment

[romaniac]

Which version of the Superb Sedan have you ordered? is it FWD or the AWD? (I'm assuming the offset is different between those two)

I'd just tell him it's the same as the equivalent Passat.

No point looking at Mercedes as they are RWD & IIRC the offset will be outwards (anywhere between ET18-ET50mm). Also the centrebore is usually 66.6 so you'll need some 66.6/57.1 hub rings (I run bub rings with the Audi wheels I'm using at the moment).

Truly, if they don't know what a Skoda Superb is & what wheels will fit then I'd run a mile. It isn't Tempe or St.George is it?

BTW: Have you asked them about weight? Every kg you add to a wheel increases unsprung weight. This means the suspension has to work harder. Also, the acceleration is slower & you'll use more fuel.

No it's not Tempe or St george, it's a small importer of wheels in melbourne. I've ordered the FWD 125 TDI version and I haven't asked about weight, I was just paying attention to tyre load weight to ensure it meets the safety requiremetns. I'm thinking at this stage it may be easier to wait until the car arrives and take it down there for inspection.

[brad]

Yep, wait until you get the car & do a trial fitment. Make sure they are locating the wheels on the hub & not using the wheel bolts to centralise the wheel.

I usually have a look at tirerack for some basic information & fitments
If the Superb is like a Passat 19x8.5 is the max you can sensibly run.
Centre bore 57.1.
Stud pattern 5x112.
ET will need to be around 45mm (say between 40mm-48mm) although you might manage 50mm with a 19x8. A few of the BBS rims shown there are ET35 but I had 17x8 ET35 on the Octy & the rears were perfect but the fronts stuck out past the guards - one of the reasons I went back to 7.5" ET50.
Weight: In 19x8.5, I'd be aiming for 10kg (22lb) rims but I think you'd be struggling to achieve that. I wouldn't run greater than 12kg (26.5lb) because once you add a tyre you'll be getting up near 23kg total.