Tyre pressures - AGAIN

[Thurman]

I know this has been done to death but, I'm after a definitive answer, which i know is difficult on a public forum!!!

Just taken delivery of Ibiza Cupra wheels (mk4) on 205/40/17's. What pressures should these be running??

30psi Front and 28 Rear seems to have gained popularity on the search, I think the recommended 33psi + etc is a bit high.

Any thoughts?

 

[kriso]

The closest you will find to a definitive answer is what it says inside the fuel filler cap If you want conjecture and opinion, read the inevitible replies.

 

[Poverty]

30 psi front and 28 rear for max grip. Higher for longer life and increased MPG.

 

[Ibiza 130 tdi]

When mine was on 16's it said 33psi and front and 30 at rear. More still if fully loaded. I just put the same in now with the lower pro 17's

 

[Thurman]

Filler cap surely only applies to a std spec car, wheel size, tyres etc?

 

[kriso]

Filler cap surely only applies to a std spec car, wheel size, tyres etc?

You didnt say you weren't talking about a standard spec car

 

[Guinness]

so what for 16s? Iv always put 32psi in mine all round.

 

[Ric 2001]

A Cupra's fuel caps says 32 all round. But your kerb weight might be a bit lighter, but I'd still stick 32 in there.

 

[Thurman]

so what for 16s? Iv always put 32psi in mine all round.

17's pal. Ive put 31 in fronts and 29 in rears today.

 

[keefy]

Are you talking Cupra diesel or petrol?? The heavy diesel should mean different pressures to the petrol.

205/40/17's are standard aren't they on the Cupra?? So, just go with what it says in the fuel cap.

 

[Ric 2001]

Derv and petrol cupras have the same pressure http://www.seatcupra.net/forums/showpost.php?p=1692719&postcount=9

thats a derv

and mine (petrol) says 32 as well.

Turman hasn't got a cupra hes just bought the wheels off one. Think some of use are getting confused.

 

[kriso]

The diesel Cupra is barely any heavier than the petrol. About 40kg I think.

 

[Poverty]

Your best bet is not to follow what SEAT say at all. Instead go on the tyre manufacturers site, put in your vehichle details and see what they say. For my GSD3's on a ibiza they said 30 front 28 rear.

 

[Mr Cellotape]

I have the Derv Cupra and iirc it is 32 all round.

 

[Gooner_Mike]

I run about 34 psi all round as I do lots of motorway miles and don't need lots of grip for corners! Seems OK. Not much difference if your only talking a couple of psi though (32 compared to 34, 34 compared to 36 etc.)

 

[mhill]

a friend was talking about filling with nitrogen, does this make any difference and worth the cost?

 

[Poverty]

a friend was talking about filling with nitrogen, does this make any difference and worth the cost?

Not worth it for road cars. I know some hyper cars come with it stock, including the new GTR iirc.

 

[depresion]

I can't say there is a definitive answer as it will depend on how you like your car to feel/the tyres (different brands, models, sizes). Personally I run 2.2bar all round and I like that, but I tend to have a boot full of crap. (Yep they are the pressures I ran at the pod)

 

[Thurman]

thanks for all the input guys - in currently running 31 at the front and 29 at the rear- seems to feel ok - only time will tell how it affects fule economy and tyre wear!!