I'm looking at some second hand rims and tyres: and wondering about the 215/35/18 tyres that are fitted. I punched the numbers into a calculator and came up with a 3.8% difference in speedo reading (which I can live with) but does this, or the size of the rims, make the wheels and tyres illegal on my car in NSW??
Re: Nup...thats thinner than stock...btw did you want traction at any point Nah im not much into traction. Sliding off the road killing everyone in the car and on the footpath and getting on the front page of the Telegraph is more my style. I've currently got 205/55/16s on the car and its not that bad so it'll be an improvement. Plus the rear tyres wont last long anyway so i'll replace them with 235/35/18s when they go.
I just flicked thru the vehicle standards info... I cant actually see anything that makes these wheels and tyres illegal... do you have any more info Andy?
Each state has their own rules - but in Vic it is plain illegal to fit wheels that are narrower than the skinniest standard fitment, which on a Z32 is 7½". There is no particular mention of fitting narrower tyres, however, the tyre must be rated equal to or higher than your tyre placard in terms of load rating or load index. Personally, the smallest 18" tyre I would use is a 225-40, I think a 215-35 is just too small - especially on the rear of a TT.
Currently Running >> with 265/35/18's & have been for the last 5 years with no problems. Actually complied with 275/35/18's. And I'm in NSW, so go figure. Cheers Kerry
Not Legal NSW RTA Vehicle Standards Information 9 Guidelines for Alternative Wheels and Tyres. "The outside diameter of the wheel and combination must be no more than 15mm over the largest diameter wheel and tyre combination specified for the vehicle and not more than 15mm below the smallest diameter wheel and tyre combination specified for the vehicle." Use http://www.miata.net/garage/tirecalc.html to calculate diameters 225-50-16 = 631.4mm Dia 215-35-18 = 607.7mm Dia :thumbsdown:
Re: Not Legal Bugger. Cheers mate. I would have chosen 235s if i had the choice... its just the opportunity came up to get a set of these rims with the tyres, all only a few weeks old, for $800... a real bargain. Maybe i should just put 2 new tyres on the back and save the rear ones for when the front needs changing??
You're absolutely "spot on" Peter:thumbsup: Isn't this a weird post? Someone wanting to put smaller width(and diameter) tyres on a Zed. What next? "Can I reduce my boost to 1 psi?":LOL::LOL::LOL::LOL:
Re: You're absolutely "spot on" Peter:thumbsup: As i said, theyre not the tyre size i would have chosen, theyre the ones that come with the rims. And as i also said, theyre both wider and bigger in diameter than the tyres currently on the car, and with the current ones i havent yet lost traction unless i want to. Further, i also said its only a temporary situation anyway as i go through tyres quickly. Anything else chili?
Heres the official rules in WA.. as a guide! Alternative road wheels are permitted under the following conditions : Rim width must not exceed the maximum rim width specified by the manufacturer by more than 25mm (1") (for passenger vehicles manufactured after 1st January 1973, the manufacturers rim width shall be taken as that specified on the tyre placard). In any event, rim width shall not exceed 177.8 mm (7") unless specified by the manufacturer as standard equipment for the vehicle in question. No increase in rim width is permitted for vehicles fitted with original equipment rims in excess of 177.8 mm (7") width. The wheel is contained completely within the body work of the vehicle which includes acceptable flares. The wheel does not foul any part of the body or suspension under all conditions of travel The vehicle handling is not impaired in any way. The tyre to rim fitment must be in accordance with the Tyre and Rim Association Manual. Rim diameters must be the same as specified by the manufacturer. The wheel must be one designed for use with the vehicle with respect to bolt pitch circle and wheel nut tapers The track must not be increased by more than 25mm (1") over the maximum specified by the manufacturer.etc. All wheels must be the same size, profile and bolt pattern. Vehicles required to comply with Australian Design Rule 24, "Tyre & Rim Selection" must continue to comply with this Design Rule (contact the Department of Transport and Regional Services for more details). The fitment of so called "plus one" and "plus two" and tyres is acceptable providing : the overall diameter of the large rims fitted with the lower profile tyres do not exceed the overall diameter all tyres and rims fitted to the vehicle are of the same size and profile with the exemption of item (f), the tyres and rims are in conformity with the requirements specified above in items (a) to (j). Reducing the wheel track less than the original manufacturers specification is not permitted, as this may reduce vehicle stability.
Isn't 1 atmo = 1 bar = 14.7 psi? That's the NA pressure I presume at normal pressure, then you add boost to it, so 9psi is actually 14.7 + 9 = 23.7 psi?
RE: Anything else CHILI? Yes Rohan. If the info provided by ZXZ32T is correct (I haven't checked it) then, 225-50-16 = 631.4mm Dia 215-35-18 = 607.7mm Dia would indicate that they are in fact smaller than stock dia. by about 24mm. That would make a significant difference to the "rolling diameter" of the wheel, and therefore the accuracy of the speedo reading. What were these fitted to previously? Just don't want to see you wasting money on something that is going to reduce the roadholding of your Zed, and place you at an increased risk.:zlove:
In that case, how wide are the rims? Perhaps the rims are too narrow? If the 215×35 tyres are illegal in NSW, and they are wider+taller than the ones you have now, that simply makes the ones you have now even more illegal. Don't get sucked into buying the wrong wheels and tyres just because they are cheap - that package will be ideal for a S15, R32/33 etc. It will also hurt resale value of the car if the first thing a future prospective buyer asks is for $2K off the price so he can buy and fit wheels and tyres that will be legal. Remember, there is more to a tyres legality than its width and diameter - it must also meet the load rating requirements. A smaller tire will have been designed for a lighter car. I say again, stay away from this deal.
What width are the rims as this is a good price for the rims! Sell the tryes on ebay! Provided they are a correct width.
Close but no cigar An NA engine is like trying to suck a watermelon thru a straw. It just can't get it in fast enough, so the intake mix is always less than 1 atmosphere (1 bar)
1" bigger than standard >> from what I am lead to believe is correct, but don't forget that Nissan produced for the American Market, a Zed with 17" rims, from the factory. :thumbsup: This being correct, also would mean that running with 18" rims, would then make it legal with, that size rim. Is this correct or not, & if not, why are the RTA passing vehicles for compliancing & rego with the incorrect rim & tyres. After all aren't they supposed to be the experts. Cheers Kerry :zlove:
