Spyder Wheels Advice

[chewbacca888]

OK I have a dilemma and would like some feedback.

I currently have 17" wheels on my Spyder running 205/40R17 84W tyres. I have since found out that the rear tyres are illegal because on the OEM tyre plycard, it states that the rears must have a minimum load rated tyre of no less than 85. I cant put a wider tyre on like a 225/35R17 because my 17" wheel is only 7" wide and the min required wheel for that tyre is 8" wide

There are no 205/40R17 tyres in Australia with that load rating and I dont really want to change all my wheels again nor do I want to have different looking wheels front and rear.

So, should i just go back to the OEM 15" wheels that came with the car and stop using my 17" wheels? What are the advantages/disadvantages or re-fitting the 15" wheels to my Spyder after running 17" wheels for as long as I can remember?

Any advice?

Thanks

[Hiro]

If you're that worried about it, maybe consider going up to a 215/40/17 as you can get them in greater than 85, and you're only putting your speedo out by 1.3%. 215 is perfectly fine for a 7" wheel too.

[chewbacca888]

Thanks for the reply but the 215/40R17 is 18mm over which makes it illegal

I was hoping that would work but the stores wont fit it from a legal perspecive

[Hiro]

Thanks for the reply but the 215/40R17 is 18mm over which makes it illegal

I was hoping that would work but the stores wont fit it from a legal perspecive

18mm over what? What is the stock size?

[chewbacca888]

The 15mm refers to the Rolling Diameter (RD) of the wheel.

Eg the OEM wheel runs 205/50R15 which gives it a RD of 586mm. The 215/40R17 gives a RD of 603.8mm. The difference is 17mm hence in just about every state in Aust, it is illegal and while no one would say Boo 9 out of 10 times, if an accident was to occur, the insurance could get really technical and say that the tyres were illegal and not pay out.

That's why i am trying to stay within the allowed 15mm range.

Dont suppose you have the OEM wheels to sell?