360 New Tires - Question

I used MPSS 225/40 on OEM wheels on my 360 and found I had to roll the fender edges as they were snagging.

225/45 will be slightly higher profile and slightly more likely to snag.

Rolling the fenders was pretty easy. A forum member lent me the tool. Patience and plenty of heat is all that's needed to do the job. I didn't have to bend the lips right back, just a wee bit was enough.

Best of luck.

 

If your staying with 18's why not use the Pirelli P-Zero's in the stock size and have no worries. If changing to the 19" wheels eg the challenge/stradales again P-zero's 225/35/19 for front and 285/35/19 rears again with no problems. No rolled fenders,with either of these choices.

Docf

 

Woops - my bad above.

The MPSS tyres I fitted to front not that long ago were 225/45 (not 40s). Slight snagging on fenders.

If you can obtain 235/40 that would be a better tyre to use. It will be 3mm lower tyre wall than stock 215/45 but have an additional 20mm across the surface which suits the car well also as it removes some understeer which is prevalent. I suspect that you would not need to roll the fenders with them (but you might!).

You will not have any issues with ASR or ABS with either size but the 235/40/18 would be a better option on the OEM wheel as it's closer to the overall diameter of the original.

 

You might ask Tazandjan on Ferrari Life Chat as he knows wheels/tire combo's very well and I'm sure he can help you make a good selection. He has helped others including myself when I purchased my new Challange/Strasdale 19" Wheels. I do not like changing OEM configurations much.

Docf
.

 

I went with stock sizes on the 19' challenge wheels on my 360 with no rubbing whatsoever. I am running Conti Extreme DW's. I cant imgaine you would have to roll fenders for going +1 on 18's.

 

Greg: Do you have the standard 360 wheels, or the modular?

 

I have the standard wheels. If the car was ever lowered it was only by a very marginal amount.

225/45 gives a sidewall almost 5mm higher than standard. I thought I'd get away with it but no.

235/40 (which will fit the OEM 7.5" wheel) has a sidewall which is just 3mm shorter than OEM and would be a better size (but I couldn't get it in my chosen tyre) and the car can use a bigger footprint up front to help with understeer.

 

I asked about the modular wheels because I observed quite a few "pulled down" fenders on 360's with modular wheels; maybe just conincidence?

On the topic of understeer: Have you noticed much change in understeer by varying front tire pressure?

-Steve

 

Hi Steve,

When it comes to understeer I found it was really only an issue in extreme road driving and on-track use. Increasing pressure firms up the side walls of a road tyre and better presents a usable footprint to the ground but the car will still wash out when pushed hard.

What's made a huge difference is some alignment settings as suggested to me by user F430GT. Significantly increasing the front negative camber and dialling out front toe-in has made an incredible difference and understeer is now banished on my car. Achieving those alignment changes is a difficult and time consuming task but worth it to achieve better balance in the car for track use.

Greg.

Edit! Steve, just realised it's you! Did you ever post up that DIY info you were working on?