Mondial 8 Wheels & Tires

the wheels, while looking like the early wheel are the same sizes (16 x 7 & 8)as the late 3.2 and t wheel, so you can use those sizes.
The stock sizes recommended were:
F: 205/55 - 16
R: 225/55 - 16

When I was running 16" wheels, I found that 215/55-16 on the front and 225/55 on the rear worked fine.

The smaller front section does a lot to lighten and crispen the steering. Remember even the 360 uses 215 front tires.

Good luck and post a photo!

 

Vito,

215 fronts with 225 rears should work, or maybe 225 fronts with 235 or 245 rears, depending on size availability. I'm using 225/45-17 fronts and 245/45-17 rears on my 1983 Mondial, they seem to work fine, no rubbing, and steering effort is slightly easier than the original TRX tires.

Cheers,

 

I second that on the improved steering. My Mondial now has 225's on the front and it improved the feel immensely over the 245's the Mondial-8's had for original equipment. My rears are now 255's; lots of room in the rear fender wells. Watch the offset of the wheels, especially on the front. Mine were originally 55mm. They are now 40mm on an 8" rim, which takes a narrower front tire to stay within the fender well.
Thor

 

Thanks for the sizes fellas.I have completely rebuilt my mondial QV externally.and am slowly getting the engine bay and interior redone.I have done my own design for all the bumpers taking subtle stying q's off different ferraris.

I now need to do the wheels as the car is looking fabulous.I want to lower the final drive ratio so Ive checked out the overall diameter of the 45 profile with 18 inch rim size .This equates to about inch increase all round.Currently on standard wheels and tyres the car will rev at 4100 RPM at 140 Km/h.This is too high for long engine life especially as its much more fun driving at speeds that far exceed this.I believe that the larger diameter will reduce acceleration a bit but on the highway will make for a much more pleasnt drive.I have owned a few Ferraris and cannot understand why Enzo didnt just simply make a 6 speed box all along .This is Ferrais single biggest failuer in my opinion but I think it can be somewhat remedied with bigger wheels?

Anyway ,I need to find out what PCD the wheels are and what offsets I can get away with rear and front.I think the centrebores are 67 mm.It would appear that there is a lot of space to reduce offset to about 40 mm on both the front and rear.Anyone out there who can help please.

 

Photo/drawing?

 

I shall send you some pics really soon.I'm just finishing the front bumper for the forth time.I have also kept photo footage of the whole job.Its quite interesting really and I have spent very little money redoing eveything.I had no idea how many mondial fans there are.The black one with the 5 spoke split rims is absolutely gorgeous.I think Ferrari should have delivered all mondials with split rims.They'd have sold much better.What makes the mondial so heavy?Any ideas regards the sizes for my wheels?

Look at the Lenso RS5 rim .This is what I'm looking at.

 

Here are the original dimensions of the Mondial-8 Wheels:

Original Wheels are: Alloy 390 x 180mm
Original Tires are: Michelin TRX 240/55 VR 390

Original wheel width 180mm/7.09in
Original wheel diameter 390mm/15.35in
Original tire OD =2*240*0.55 + 390 = 654mm/25.75in

bolt circle 108mm/4.25in DIA
centerbore Center Bore: 50mm/1.97in DIA x 35mm/1.37in DP (26mm/1.02in DP)
Counter Bore: 68mm/2.68in DIA x 9mm/0.35in DP
Original offset +55mm/2.165in (out from hub)


The wheels and tires I went with are:
17"x7.5" Rims, 4.25" Bolt Circle, 40mm offset
17" 245/45 Rear
17" 215/50 Front

Increasing the Tire's OD will also throw off your speedometer. A Larger OD will read lower on the speedometer than your actual speed. Mine was off quite a bit, so you might want to check it's accuracy with one of those GPS walkie talkies. I would have corrected the speedo problem by resizing the tires if I had known how far off it was beforehand.

 

He was giving you the wheel size for a 308. Mondial 8 wheels are 7" front and back. I too have a Mondial 8 and just went through the wheel / tire replacement search last year. Here is the math on tire sizes:

- Original tire = 240/55 - 390

240 = width
55 = aspect ratio
390mm = wheel diameter (15.35")

Width X aspect ratio = section height, so 240X.55=132

Overall diameter = wheel diameter + (section height X 2)

So, the original tire/wheel overall diameter = 132X2+390 = 654mm = 25.75"

Therefore 16" tires that will closely approximate the overall tire/wheel diameter are:

245/50 - 16 which gives a tire height of 25.65"

225/55 - 16 which gives a tire height of 25.74"

205/60 - 16 which gives a tire height of 25.69"

I went with the 225/55 since it matches the original tire height, therby keeping the spedo accurate.

 

My first choice was to go with the 245/50, but the Superformance wheels are 7" wide and 7" is the lowest limit width for a 245/50. Many people cautioned me against going this route so I went with the 225/55. I actually like the size of the 225/55 tire in the wheel well. I think it fits well.

As for tires, choices are limited in 225/55 for high performance. My slection critera was for road noise first then performance (I don't intend to run on the track or take the car out in the wet.) I did a lot of on-line research and ended up ordering Goodyear F1 GS-DS3s from TireRack. After placing the order they called me the next day to say they are no longer in production in this size.

So, back to square one on tire selection. TireRack was pushing the Avon Tech M500s. They had plenty of them in stock. The reviews and price looked good, although I was not overly concerned about price. They had a great noise level rateing and their performance numbers were very good as well. Most of the other performance tires in 225/55 had poor noise ratings so I decided to give the Avons a try.

I've had the wheels and tires on the car for 1/2 year or so now and I'm happy with both. The tires really improved the ride! Low speed steering is actually much easier now as well. They are very quiet and have a predictable breakaway in the corners, although I'm not pushing them to the max. I've had many compliments on the Superformance wheels. Fit and finish is about right for the price, not perfect but good.

Good Luck!

 

One other note. I found the center caps that came with the Superformance wheels to rattel around a bit. I took the original center caps from my metric wheels and they fit the Superformance wheels perfectly.

 

Here's a pic of the Superformance wheels with the Avon Tech M500 tires.
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I've been running 17" wheels on My M8 for ten years now cant even remember how the car use to ride on TRX. I was using compomotive 17x8 all around with 235/45 front and 245/45 on the rears, I wanted to use 215's for the front but when I was buying tires when I find a 215 tire there was no matching 245 for the rears of the same brand. Recently I bought a set of 348 wheels and stayed with 215's for the front but switched to 275/40 for the rears the 255/45 were just to tall. Like many have noticed the streering was lighter and front end was more responsive. I also had all the rubber bushings replaced to polyurethane couple of years ago.

 

Now would be a good time for a photo...

 

...or at least keeping it to the same level of inaccuracy!

 

Here is a handy little spreadsheet that I have been using and tweaking for years.
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Any chance you could fill out your profile so that we can know more about you?




Would love to see your bumpers, here are a couple of others:
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Oh and sorry for the hi-jack...

 

Absolutely true. It amazes me that folks are so anal-retentive about keeping the same rear tire diameter when the speedo is so WAY off to begin with. If you do the math, the speed is proportional to the (#revs) x (wheel circumference). Since circumference is 2(pi)r, the difference is speed reading is the ratio of tire height. When you do the math, you have to generate some fairly noticible height differences before you really impact the speedo, which is WAY off to begin with, and made WORSE by smaller diameter tires.

Does anyone know if the speedo doofer on the front boot is adjustable to compensate? If we could figure that out, that would be a watershed event for Mondial owners.

Hey Clive, I know you're buds with HRH Princess Anne from a while back, is she a buying one of the Monzers? Isn't she the one that liked Scimitars so much?

 

replaced my old TRX's with these from a later car.
Bolted straight on, no probs and transformed the car. 7 x 15 on the front and 8 x 15 on the back
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