Hi I'm a noob to Skoda turned away from an e class Merc estate to buy my first Skoda, not seen many with mods but I'm starting with wheels and tyres. 19" wheels 235/40/19 is standard all round tyre size, I want to put 245 on the front and 255 on the back, are the arches wide enough to take this tyre size or will that size touch on turning circle at fronts or carrying a full load on rear, going to lower it 30mm hopefully after I've got wheels n tyres sorted 😁, has any one been through this hardship 😬I need  to know I can't sleep it's killing me 🥺.  

4 hours ago, NOOBTOSKODA said:

Hi I'm a noob to Skoda turned away from an e class Merc estate to buy my first Skoda, not seen many with mods but I'm starting with wheels and tyres. 19" wheels 235/40/19 is standard all round tyre size, I want to put 245 on the front and 255 on the back, are the arches wide enough to take this tyre size or will that size touch on turning circle at fronts or carrying a full load on rear, going to lower it 30mm hopefully after I've got wheels n tyres sorted 😁, has any one been through this hardship 😬I need  to know I can't sleep it's killing me 🥺.  

 

As you can see in the chart below, 255/40R19 tyres have a 8mm bigger outside diameter than 245/40R19 tyres.

 

So even when the tyres are new, the 255/40R19 tyres will have a 1.2% bigger outside diameter than the 245/40R19 tyres.

 

On a front wheel drive car, the front tyres tend to wear a lot quicker than the rear tyres. So it wouldn't be long before the rear tyres had an outside diameter over 1.5% larger than the front tyres. This might cause problems with the traction control, ABS, etc., because the front tyres will be spinning a lot quicker than the rear tyres.

 

Also, it's useful with a front wheel drive car to be able to rotate the tyres front to back to even out the tread wear.

 

Fitting wider rear tyres is more of a rear wheel drive thing. Front wheel drive cars tend to understeer not oversteer, so fitting rear tyres that are wider than the front tyres seems a bit pointless on a front wheel drive car.

 

Outside diameter of tyres

245/40R19 678.6mm

255/40R19 686.6mm (+1.2%)

 

Edited 27 May, 20233 yr by Carlston

@NOOBTOSKODAWelcome to the forum.

 

?

What Superb have you, as in trim model / engine / gearbox, FWD or AWD (Haldex)? 

2 hours ago, toot said:

@NOOBTOSKODAWelcome to the forum.

 

?

What Superb have you, as in trim model / engine / gearbox, FWD or AWD (Haldex)? 

L&K 190ps 4x4 2.0

tdi

@NOOBTOSKODA  That kind of detail is what is needed when you are asking for info on vehicles. 

?

Do you just want to go Staggered for stylee reasons. 

If so then best stick with the correct & matching circumference front and rear. 

You have a Haldex System.

?

Has that been serviced correctly at least twice so far, not just oil changes @ each 3 years / 30,000 miles.

 

http://briskoda.net/forums/topic/513188-staggered-tires-xtreme-19

 

 

 

2 hours ago, Carlston said:

 

As you can see in the chart below, 255/40R19 tyres have a 8mm bigger outside diameter than 245/40R19 tyres.

 

So even when the tyres are new, the 255/40R19 tyres will have a 1.2% bigger outside diameter than the 245/40R19 tyres.

 

On a front wheel drive car, the front tyres tend to wear a lot quicker than the rear tyres. So it wouldn't be long before the rear tyres had an outside diameter over 1.5% larger than the front tyres. This might cause problems with the traction control, ABS, etc., because the front tyres will be spinning a lot quicker than the rear tyres.

 

Also, it's useful with a front wheel drive car to be able to rotate the tyres front to back to even out the tread wear.

 

Fitting wider rear tyres is more of a rear wheel drive thing. Front wheel drive cars tend to understeer not oversteer, so fitting rear tyres that are wider than the front tyres seems a bit pointless on a front wheel drive car.

 

Outside diameter of tyres

245/40R19 678.6mm

255/40R19 686.6mm (+1.2%)

 

Ok so it's 4x4, for me it's about protecting the rim edge, I have wheels I had on C32 AMG Estate 10 years ago, 235 front n 255 rear as rwd.  I cleaned them up, they look brand new, I know they will go on Skoda but 255 sits much better on the rim covers rim edge with plenty to protect it, 235 is well asking for my Mrs to curb them lol 😳😂 she won't thank me for that cos I remember curbing them myself n had them repaired asap🫣🤫

2 minutes ago, toot said:

@NOOBTOSKODA  That kind of detail is what is needed when you are asking for info on vehicles. 

?

Do you just want to go Staggered for stylee reasons. 

If so then best stick with the correct & matching circumference front and rear. 

You have a Haldex System.

?

Has that been serviced correctly at least twice so far, not just oil changes @ each 3 years / 30,000 miles.

 

http://briskoda.net/forums/topic/513188-staggered-tires-xtreme-19

 

 

 

My apologies my friend I apologize for leaving that out, I also appreciate any help 👍🏽

You are not getting rim protection at the rear when you go wider but with lower profile to keep the circumference the same. 

 

@CarlstonKnows the rim widths and tyre widths and what is what is what as far as the bulge goes.

 

 

Edited 27 May, 20233 yr by toot

According to wheel-size.com, the Mercedes C-Class AMG (around 2012 model) uses 235/35R19 fitted to 8Jx19 ET45 front rims and 255/30R19 fitted to 9Jx19 ET54 rear rims. wheel-size.com do often make mistakes but let's assume that's correct.

 

The outside diameter of these tyre sizes are about 1" too small for the Superb MK3.

 

You could fit 235/40R19 and 265/35R19 to them, but I suspect the rear would rub.

 

As you can see in the chart below, the narrowest ETRTO approved rim width for a 235/40R19 tyre is 8J and the narrowest ETRTO approved rim width for a 265/35R19 is 9J. So your rims are wide enough, if that the width they are.

 

A 235/40R19 fitted to an 8J rim has an actual width of about 235mm, and a 265/35R19 fitted to a 9J rim has an actual width of about 265mm.

 

So by changing to a 265/35R19 from the 235/40R19 size, you are adding 30mm to the width of the tyre, which is 15mm each side...and because you would be changing the rear offset from ET44 to ET54 you would need an extra 25mm of space on the inside of the tyre to prevent any rubbing.

 

I suggest you get the car on a car lift and take a look to see if there is 25mm of space available, and you would need a little more than that because the suspension moves when the car is subjected to lateral forces. I would want more than 30mm of space between the inside of the 235/40R19 tyre and anything a wider tyre might come into contact with. I doubt there is over 30mm of space, but feel free to check yourself. There shouldn't be any rubbing on the outside with a 265/35R19 fitted to a 9J rim with an ET54 offset as this tyre and rim only needs an extra 5mm of clearance compared to the standard 235/40R19 fitted to an 8J rim with an ET44 offset, of which that isn't likely to be a problem. So the only real concern I would have is the inside clearance.

 

255/35R19 has a significantly smaller outside diameter to 235/40R19 so wouldn't be suitable, especially for a 4x4. 

 

ETRTO approved rim widths

235/40R19 8.0-8.5-9.5
265/35R19 9.0-9.5-10.5

 

Edited 27 May, 20233 yr by Carlston

4 hours ago, Carlston said:

 

As you can see in the chart below, 255/40R19 tyres have a 8mm bigger outside diameter than 245/40R19 tyres.

 

So even when the tyres are new, the 255/40R19 tyres will have a 1.2% bigger outside diameter than the 245/40R19 tyres.

 

On a front wheel drive car, the front tyres tend to wear a lot quicker than the rear tyres. So it wouldn't be long before the rear tyres had an outside diameter over 1.5% larger than the front tyres. This might cause problems with the traction control, ABS, etc., because the front tyres will be spinning a lot quicker than the rear tyres.

 

Also, it's useful with a front wheel drive car to be able to rotate the tyres front to back to even out the tread wear.

 

Fitting wider rear tyres is more of a rear wheel drive thing. Front wheel drive cars tend to understeer not oversteer, so fitting rear tyres that are wider than the front tyres seems a bit pointless on a front wheel drive car.

 

Outside diameter of tyres

245/40R19 678.6mm

255/40R19 686.6mm (+1.2%)

 

Ok so it's 4x4, for me it's about protecting the rim edge, I have wheels I had on C32 AMG Estate 10 years ago, 235 front n 255 rear as rwd.  I cleaned them up, they look brand new, I know they will go on Skoda but 255 sits much better on the rim covers rim edge with plenty to protect it, 235 is well asking for my Mrs to curb them lol 😳😂 she won't thank me for that cos I remember curbing them myself n had them repaired asap🫣🤫

🙏 thx guys Im not a professional, but I know by looking at the pics I have I'd like to go 255 rear n 245 front, if you look at the pics you see the added tyre at the edge of the rim. I know I'm a noob I'm asking will they fit under the rear arches 255, n will 245 fit under the arches at the front, from pictures it simply looks to me that the added rubber compared to my thumb nail will add some protection, I suppose after seeing everyone's comments il have to try them and see what happens, thank you guys you have all been so helpful and knowledgeable, I appreciate your advices thank you. 

Ok tried the wheels today 255/35/19 on rear, wheel bolts were incorrect, but ooh dey looked good😁, I will order the correct new wheels bolts on Tuesday due to bank holiday🤷🏾‍♂️, I just got to try to get what I want, if it doesn't work il have to go stock sizes on tyres. Will follow up with pics hopefully when I actually get the right new tyres on the rims that fit 🫣. 

@NOOBTOSKODAIs this the Merc Wheels you tried on.

http://briskoda.net/forums/topic/512292-fitting-mercedes-alloys-to-skoda-yeti

 

Edited 28 May, 20233 yr by toot

Yes I wanted to compare the actual size of the 235/45/18 original Skoda wheels & tyres actual size compared to 235/35/19 & 255/35/19.  Wanted to understand the info you gave about actual size, it was a good process, learned a few things just by looking n comparing the wheels against each other, specifically the 235/45/18 against 255/35/19. 8.5j front 9j rears are the Mercedes wheels, so I'm Gona take the wheels & tyres with me the place I bought the wheels, get them to put it in the ramp n physically see what space we have and if my memory serves me correctly put 235/40/19 front 265/35/19 rear like you suggested.

Spot onYes spot on again length of wheel nut was similar but circumference of wheel bolts where different hence il order new ones. Thanks again 👍🏽 il let you know when I figure out what sizes to go with your knowledge is much appreciated.👍🏽 

Hi guys just an update, ooo I'm so pleased, 255/35/19 8.5J front 255/35/19 9J rear, wheels powder coated & new tyres fitted all on car & look great, no rubbing with a full load I'm so happy with the out come, wanted to thank everyone especially Carlston & Toot for the advice help and guidance 💪🏽💪🏽💪🏽. It took a while as car was in body shop having some fine detailing done, then powder coating etc, getting it right is so important, had windows tinted aswell 5% looks good, I'm sure it's not every ones taste but happy wife happy life 🤷🏾‍♂️, next up lowering B6 Bilstein Damptronic shocks pared with Vlogland Springs, new top mounts all round n 4 wheel alignment. 

Spoiler

 

Any idea how I delete a previous picture so I can add a picture of my car with new rims n tyres, didn't realise there was a limit🤷🏾‍♂️