360 Is it recommended to fit 19 inch 430 wheels to a 360 spider

I did it on my 360. These were off of a 430. They are Forged 360 wheels; 19".

The company is called Forged 360 wheels.


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Does the 430 have a softer suspension to make up for having less give with less sidewall?

 

It's not just about 18s Vs 19s, etc it's the actual weight of the wheel and tire combined that makes the biggest difference and it's unsprung weight (look it up if your unfamiliar with the terminology).

If you are going up in size find out the current weight of your wheel and tire today and try to get lightweight forged wheels which aren't heavier, ideally lighter (lighter are more expensive but make a considerable difference to performance).

Obviously your tire sidewall will have to go down too so ensure the replacement tires have good ride quality. Some are much better than others, one great all around such tire is Michelin Pilot Sport 4S.

 

I had ABS/TC issues with 430 wheels on my car as the front rear tyre size ratio is diffferent. More of an issue on early cars and mines’s a late 2000. I think the first spiders are 2001?

 

I second trev post— I’ve hurt a cars performance w bigger and heavier non oem wheels tires. The handling and balance and accel were effected.

This is something to do your homework vs just go for looks. If in doubt stick w stock imho.

 

Have stock 19" 430 wheels on my 360 spider. No issues with ride or handling. Look great!
Regarding weight. 360 came with 430 wheels when I purchased. I can say they are considerably heavier compared to my former F355 magnesium wheels!

 

I am running the Michelin Pilot Supersport tires. (front: 235-35 and rear: 325-30). I find wheel Offset is what is critical more than anything when choosing an aftermarket wheel. And as Trev pointed out, I always go with a forged wheel on all my cars to reduce unsprung weight.

I had the original wheels on my 360 when I bought it but I changed them out before I even took the car out of the garage. So as comparing the new 19" wheels to the original 18" ones for handling and ride quality, I couldn't say. But I can say, I've had no issues other than lowering the car would be a concern. My car was lowered when I bought it. Despite "rolling" the fender lips on both the front and rear.I do get some "rub" up front on turns into steep grades like driveway entry or other parking lot egress/ingress. A large dip in the road will rub the rear tires ever so slight. Yet the car handles well. Now this is with these aftermarket wheels. I suspect the OEM 430 wheels would not have any issues as the offsets are less aggressive.

I almost always drive my 360 in "Sport" mode so I could see where the ride may be a little rough for some folks tastes with the reduced sidewall of 19" wheels and tires. However, never any complaints from the lady in the passenger's seat. Life is good when you have the right car and the right lady

 

^This...is the answer to “why is my car so slow,” after going to 19” wheels and tires. I looked at a lot of 19” combinations and all but the most expensive are heavier than stock. The most expensive are about the same. So the easy decision for me was to stay with OEM 18” wheels. Tires in the right sizes for 18” are an issue for another thread.


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I also have stock 430 wheels on my 2003 360 Spider. No issues, although I did need to roll the front fenders (which I suspect I would have needed to do with stock 360 wheels, too -- also a topic for another thread).