360 best track tires, factory and custom sizes. What worked best on your car?

I am planning to track my 360 stick, which currently has street tires.
Tire technology has changed significantly in the last 20 years, but I don’t see any comparisons for a retro car showing track times on different tires.
I have seen much wider tires used front and back, and am curious what the best size is. The 215&275 seems quite narrow by todays standards.
Does the car throw codes when you change the diameter of the wheels?
An example is a youtube video of 255/30-19, 345/30-19, I can post screenshots, but no explanation why that size or if it performs better.
Another retro video with 235/40-18, 295/30-18 on advan ad08, but those are retro tires. Any help from actual track users would be great, as I cant seem to find what the best tire for the 360 is in ‘22.

 

I noticed the OEM front wheel is the limiting factor on the width of the tire that will work, 7.5” is quite narrow. What size of MPS4S are you using. The rears I am assuming are the 285/45-18, but the front could be either the 225/40 or the 225/45, both should be within tolerance, and why did you go with the size you went with. Does it transform the car handling?

@jcurry I know you mentioned the pirelli trofeo’s, do you have them on the OEM wheels in the 235/45/18? Their website said 235mm tire is recommended with 8” -9” rim. When I say OEM I am referring to the starfish wheels or the modular bbs wheels, I have both and both are 7.5” fronts, rears can take any size tire that would normally be fitted to a 360 as its a 10” rim.

 

I’ve been manually crunching diameters for about 20 years now. i love the weird mixing of imperial and metric.
OEM is 275 x 0.4 =110mm. So in Toyo’s they have 305/35-18, which is 106.75mm, thats very close to OEM diameter. They also have a 225/40-18 (toyo r888r) Any concern with that big of a spread front to back? Factory is 215 and 275, which is 60mm width difference. 225 and 305 is 80mm width difference. If I have to swap out wheels it’s not a problem, I would prefer to use OEM since I have a spare set of the starfish wheels in storage with no tires. I will play with allignment for sure as well, I just want to set it up to get max out of car.

 

Typo in my message, I assumed you had the 285/40-18 in the rear, which is very close to OEM, but glad Inasked as that is not the case. I know a new set of the MPS4S was just launched so it’s possible that size wasn’t available when you installed them. 285/35 is 10.25mm smaller per side, and 285/40 is 4mm bigger per side.
225/40 is 6.75mm smaller per side
While 225/45 is 4.5mm bigger per side.

no codes being thrown by car due to variance in diameter of wheel?

 

Thats where I’ve been looking up specs. 225 in r888r is good with 7.5”, the 235 is 8” min. I have yet to find a 235 that works with 7.5”, but I’ll keep looking and post here if I find it. Anything up to 305 for the rear is OK with the 10” in the back.

 

I noticed limited tire selection in 18” front and rear as @jcurry mentioned above when I look for wide tires.
I see tire selection significantly increase if I use 18” in the front, with 19” in the rear. Considering the factory wheels are 1.04” larger in diameter in the rear compared to the front, has anyone tried doing this? Would it be better/worse or same when compared with 18” on all 4 corners?

For general info:
18” factory tire sidewall front 3.81”, rear 4.33”
Aftermarket 255/35-18 front 3.51”, 315/30-19 rear 3.72” (this is an example, many similar tire sizes can be used)

This would be with aftermarket forget track wheels.

 

I have posed this question directly to @jcurry, but I will update here as well to keep everyone looking at this thread up to date.

I have 2 sets of the starfish wheels.
I have found some information (xls file) on ferrarichat stating the rears are 18 x 10.5, but that is not correct, they are 18 x 10 (confirmed today as the extra set I have is in storage with no tires).

10" can accommodate tires from 255mm - 305mm.
So I will throw on the spare rear starfish wheels on the front, and go with a square 18 x 10 setup all around. If this clears the front without interference, I will keep the stock look of the starfish with likely 255/35-18 & 305 /35-18 in Toyo R888R.
I will hopefully confirm this works for anyone else that wants to do something similar in the future.

 

No worries @jucurry, sounds good, I will test it out and let everyone know if this works.
My shop is 85% confident it should, but you just never know until you try it.

The other 2 tire options here are Yoko A052 & Bridgestone RE-71RS both in 255/35-18 & 295/35-18.

 

Update:
I just picked up a set of 18” bbs wheels from a local ferrari dealership. I am looking at what the best set of tires for this is, considering these are 8&10.5, lots of wider tire options become available.

@Need4Spd I will run my stock wheels with the 225/40 & 285/35 as per your suggestion, most likely the PS4S.

 

@David993s is this a general comment, or are you running NY01’s on a 360? If so, what size front and back?

 

To give an update on the thread, I will not be tracking this car, but will still use the fast street setup as per above with the 18” challenge bbs wheels.
I decided to keep the original recommended size on these wheels, stepping up the width both in the front and rear +20mm from stock.
I finally made a decision on the more street friendly tires and size.
Continental extremecontact sport 2
235/40-18
295/35/18