Big Alloys

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The wheels fit on the Car !!!!!! Just been down to try them on, However there are some concerns the rear wheels will neeed to be skimmed as they are fouling the inner arch splash guard and the front does not take full lock, but they did look the proverbal mutts nuts. Just deciding whether to take a chance on them.
 
Maybe the 205/40R17 size is the biggest you can fit without fouling problems.

What offset are the 18Jx7.5H2 rims using?
 
hi all,

do the calcs. the 195/45R16 , 175/60R15 and 205/40R17 all have circumference within 1% of each other. 3% is permitted by the TUeV, otherwise it could not be fitted from the factory. That's why 215/35R18 will probably work: 595mm diameter for 205/40R17, 607 for 215/35R18, 2% diff. 225/30R18s 592mm - these should be OK, but you'll have to be really careful about the ETs and the bodywork....

Bret

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2002, Petrol 1.4, 17", sports suspension, OpenSky, leather / alcantara in iceblue
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Someone said that they fitted 215/40R17 tyres with no problems and that size has an outside diameter of 603.8mm.

The 215/35R18 has an outside diameter of 607.7mm. This is a radius of only 1.95mm more than the above 17" tyre.

Maybe the offset of the 18" rims is the problem rather than the dimensions of the tyre? I'm not sure what offset of the 17" Audi A2 rim is, but that might be the offset you need. (Something like 28mm or 32mm?)
 
Yeah thewheels are on a 38mm offset and the suppliers are willing to skim a couple of 3mm of the rears but from what i saw last night it neeeds to be this wide at the front! They are giving me a call in the morning with other possible wheel combos or gurantees on the skimmed eighteen.

The tyre last night was a pirelli P Nero which had no kerb band so i will be needing them to find a more suitable tyre aswell, but the good news is they go on a sport with the bodykit, i only mention this as the sport is 10 mm lower and the body kit reduces some of the arch space at the rear.
 
Getting them skimmed will make the offset worse. ie. skim 10mm and you have a 48mm offset.

You could use 10mm spacers, (that effectively changes a 38mm offset rim to a 28mm offset rim), although i don't like using spacers as they are surprisingly heavy even the aluminium ones.

Are 7" rims available instead of 7.5"? This would be the minimum size for 215/35 tyres and would reduce the width of the sidewall by about 5mm. ie. 2.5mm each side. Used in conjunction with ET28 rims, this could be the answer.
 
I understand what you are saying but the wheels need to come in further to the car, away from the arch lip, unfortunatley a reasonble design of whell in 7"x18" is as common as a chicken`s tooth.

Just waiting to read the gurantee they are going to offer me on the skimmed wheel.
 
I suppose it comes down to how much the rim manufacturer allows them to be skimmed down to. Too much, and they will be weak.

Skimming is standard practice in the aftermarket alloy wheel industry, as it allows one casting to be machined in different ways, depending on final fitment. They often need longer wheel bolts due to excess metal in the central area. These longer wheel bolts can damage your hub if you get a puncture and put a standard wheel back on for example.

All 4 rims should be skimmed the same amount to maintain the standard difference between the front and rear track. For example, the rear track may be 25mm wider than the front track.
 
Cheers smartboost you seem to have a good grasr of your apples. Will let you know how it all goes
 
It is sound deadening sheets.
It comes in packs of sheets and is 200mm by 500mm in size, cost £25 per box or less depending on where you go
 
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