Wheel size question.

[Snoopy]

Ess_Three is the guy to ask but i would expect (But you ask very late in the day so im not thinking straight) that as its Pound force per Square Inch it would be the same.

[am1w]

Ess_Three is the guy to ask but i would expect (But you ask very late in the day so im not thinking straight) that as its Pound force per Square Inch it would be the same.

I thought so too as it is the measurent of pressure that is of interest.

[Ess_Three]

Ess_Three is the guy to ask but i would expect (But you ask very late in the day so im not thinking straight) that as its Pound force per Square Inch it would be the same.

I've always run the pressures at roughly the same as OEM, despite wider wheels - assuming the tyre didth is the same.
But I mess about a bit from there...I use the standard pressures as a base and adjust to get the characteristics I want.
Usually, fronts slightly lower than standard for 2 people and rears up near full load pressures.

[Exonian]

The tyre pressures are calculated by VW to allow for axle weights and the sort of speeds the car is designed to be driven at. Therefore within reason the pressures stay the same whatever size wheels and tyres you run.
Obviously a bit of experimentation will only help your personal requirements but don't vary the pressures too far from recommended pressures. If you have a serious accident I'm pretty sure an insurance assessor will check tread depth, tyre condition, speed ratings and pressures these weasels will want to duck out of any payments they can get away with.

[Ess_Three]

Found a set of Skoda wheels with a 51 offset with everything else correct.
They're 7.5j though - which I guess is better for winter tyres anyway?

What tyre size would go on a 18 x 7.5 wheel?  Still a 225 x 40 x 18?

If the ET45 fit and cause no problems then I'd probably rather have them.

On an 8" wide wheel, ET50, 225s sit just inside the arches, and there is no rubbing.

A mate bought some 8.5" wide wheels, ET45 and they plainly stuck out...so be sold them without even putting tyres on.

But, I can't imagine 5mm more 'out' on my BBS causing too much of a problem...however, I can't assure you they'd not catch, as not all wheel offsets are as accurate as the maker would suggest!

Personally, I'd find some ET50s or go with the 7.5" wide Skoda wheels, as winter wheels to gove a little more protection from the tyre.
But I'd be fairly confident that the ET45 8" wide wheels would be OK, as I reckon they'd sit about the same place in the arch - relative to the wing - as my 8.5" x 19" VWRs do....and I run 225 wide tyres, where Neil runs 235s on his and doesn't get any outwer rubbing.

[Ess_Three]

The tyre pressures are calculated by VW to allow for axle weights and the sort of speeds the car is designed to be driven at. Therefore within reason the pressures stay the same whatever size wheels and tyres you run.
Obviously a bit of experimentation will only help your personal requirements but don't vary the pressures too far from recommended pressures. If you have a serious accident I'm pretty sure an insurance assessor will check tread depth, tyre condition, speed ratings and pressures these weasels will want to duck out of any payments they can get away with.

Judging by how many people never check their tyre pressures regularly, or only "pump them up when the wheel (!) looks flat" I'd say a reasonable variation in pressures won't be an issue....within the limits of being sensible, obviously.

If people want to really set the pressures accurately, they need to measure the tyre temperatures and set pressure and wheel camber to suit.
Yes, I'm that sad...I do!   

[p3eps]

Well today I ordered the Skoda Zenith wheels.  4 almost new (ex demonstrator but no marks) for £375 including shipping.
They're pretty basic, but should look reasonable on the golf.  Plus they ALMOST have the ideal fitment at 5 x 112 with an ET51 offset.
I'll get them powdercoated black when they arrive, and try and get a set of tyres ordered tonight for them.

My next task is to get a set of VW center badges for them.  Any ideas where I can get these?  I don't know if they'd be the same size as the ones out of my current wheels or Monza's or something.  Its a possibility though since they're VAG wheels.

Glen - did you get yours powdercoated by PPS at Inverurie?  A guy at work had his Fiesta ST ones done there and they removed all his kerb dings and re-finished them in black for £35 per wheel.

[am1w]

Which tyres?

Brilliant value: Vredestein Wintrac xtreme, W rated, £136 from mytyres.

Best tyres IMO: Michelin PA3, W rated, £246.90 or Conti 830P, V rated, £202.69. Both from pneus.

All 225/40 R18 92 XL.

Hopefully you can find these cheaper.

[MAW73]

Well today I ordered the Skoda Zenith wheels.  4 almost new (ex demonstrator but no marks) for £375 including shipping.
They're pretty basic, but should look reasonable on the golf.  Plus they ALMOST have the ideal fitment at 5 x 112 with an ET51 offset.
I'll get them powdercoated black when they arrive, and try and get a set of tyres ordered tonight for them.

My next task is to get a set of VW center badges for them.  Any ideas where I can get these?  I don't know if they'd be the same size as the ones out of my current wheels or Monza's or something.  Its a possibility though since they're VAG wheels.

Glen - did you get yours powdercoated by PPS at Inverurie?  A guy at work had his Fiesta ST ones done there and they removed all his kerb dings and re-finished them in black for £35 per wheel.

That's a sensible move there p3eps... and the alloys are actually quite nice and will look the part in black (Satin or Gloss Black). Are they 18's?

Out of interest how's the Golf R been so far this winter seeing as its 4wd?

 

[am1w]

Martin: I think the answer is in his intended purchase of winter wheels and tyres.