Tire pressure for 17" Sports Pack wheels

[nomadx38]

Hey everyone I have just purchased some 17" boavista alloys that come with the sports pack (for the 77tsi) and wanted to know if the tyre pressures are the same for both the 17" boavistas and the stock 15" rims.

I was just wondering if you have a 77tsi with the sports pack, could you please post a picture of the tyre pressure place card on the fuel cap.

It would be much appreciated, thanks.

[Mcjords]

Normally the bigger the wheel, the higher the tyre pressure. It would only be a difference of a couple of PSI; until someone posts a pic of their tyre placard I would recommend somewhere around 36-38 PSI.

[Bassik]

Think 39-40 is for GTI 17" although I think tyres are slightly wider. I'd say 38 would be a good setting depending on load.

[Hail22]

Boavistas and is inside the fuel cap (Should be) is 38 PSI

[nomadx38]

Thx guys for the replies but unfortunately i need to know all the measurements for the tyres. The min and max for both front and rear tyres. Posting a photo is probably easier than writing it all into a table.

Cheers anyway.

[Bassik]

Thx guys for the replies but unfortunately i need to know all the measurements for the tyres. The min and max for both front and rear tyres. Posting a photo is probably easier than writing it all into a table.

Cheers anyway.

Sorry buddy I have a GTi so can't get a photo... there is a TSI Polo with Sports Pack at my work I could take a photo of his stock wheels but thats about it.

[bigfoot]

[nomadx38]

@bigfoot

Thank you SOOOOO much, you are an absolute LEGEND!!!

[Diesel_vert]

The only issue I have is that the 17s are an "extra load" tyre (215/40 R17 87V XL) and not a "standard load" tyre (215/40 R17 83V)

XL tyres are designed to achieve their increased load capacity through higher inflation pressures, so at a glance, 2.2 front / 2.0 rear for the 17s looks suspiciously low to me.

However, I don't think they need to be as high as the 1.4 GTI (2.7 front / 2.5 rear) since the 1.2 TSI isn't as heavy.

So I would try 2.4 front / 2.2 rear, or 2.5 front / 2.3 rear.

[nomadx38]

@diesel vert

It's to my understanding that XL tyres "can" have higher tyre pressure to carry more weight because they are reinforced (which is good for Aussie potholes). They do not require more pressure for normal use though. Where they come in usefull is space savers where they can be thinner to save room, but at the same have more pressure to carry the required weight. And the letter is just a speed rating. I have some Michelin Pilot 87W XL for these rims just wasn't sure if the pressures would be the same from my 15" to the 17" but it is the same, which is good.

[Diesel_vert]

Standard load and extra load tyres follow different load capacity curves at the same inflation pressure, so it is usually best practice to increase the inflation pressure of an extra load tyre if the difference in load index (when compared to a standard load tyre) is less than 4.

Load capacity per tyre @ 2.2 / 2.0 bar:

84 = 450 kg / 420 kg

85 = 465 kg / 430 kg

86 = 480 kg / 445 kg

87 XL = 435 kg / 405 kg


Load capacity per tyre @ 2.4 / 2.2 bar:

87 XL = 470 kg / 435 kg


Just a curious observation is all.

---

[nomadx38]

@diesel vert,

Thx for the information, usually with any tyre I go about half way between the min and max. With my 15" continental I usually do 2.3bar back and front so I'll probs do the same with the 17". I have got good mileage out of them at this tyre pressure and it didn't eat out the centres of the tyres so I'll think I'll play it by ear, but at least there is not to much variance between the two types of rims. I thought there could have been a large difference because one is a quite low profile.

[Diesel_vert]

I thought there could have been a large difference because one is a quite low profile.

There is a large difference... if you look at the inflation pressures for the 1.4 GTI DSG (which come with the same 215/40 R17 87V XL tyres from the factory):

Normal load
2.7 front / 2.5 rear

Full load
2.9 front / 3.1 rear


In my view, I don't think the 1.2 TSI DSG is light enough to warrant a full 0.5 bar reduction for 215/40 R17 (a 0.3 bar reduction seems more logical), but there we are.

[nomadx38]

What I meant there was no difference between what vw recommends for both rims both the 15" and 17" rims for the 77tsi. I checked my tire pressure card against the one posted earlier.

The GTI has different tyre pressures because it it's heavier overall (about 100kgs I think) so that's fine, I understand that, is odd though that it is .5bar more though...

I thought with the stardard 77tsi with 15" rims been 2.2bar min and 2.4bar max for the front, the 77tsi with sports pack 17" rims must be about say 2.4bar min and 2.6bar max for the front (etc for the back) but it's the exact same going by the tire pressure card. If its what vw recommend then I'm happy.

Anyway thanks for the insight, gave me a bit to think about :p

[Sword_Dude]

OK call me an idiot.

Stupid Question of the week.


If the tyre placard says 2.20 bar (about 32psi), why would you increase the pressure to 2.4 bar, shouldn't VW now what the correct pressure is for the tyres they put on the cars.

cheers