Testarossa Wheels 5 stud - Ferrari Life
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post #1 of 25 Old 11-29-2011, 06:38 PM Thread Starter
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Testarossa Wheels 5 stud

Does anyone know the ofset of the standard wheels, The speedo seems to read a little low (8km) and it has the stock size tyres. Anyway the tyres are about 15 years old and not much tread. (good year NCT) These were crap when new and now very bad in the wet. Do other model wheels fit without spacers? found a set of 18x8 and 18x9 wheels both 55mm ofset. Might be ok? Or maybe other tyres on orignal wheels??

Many thanks for advice..

Andy
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post #2 of 25 Old 11-30-2011, 02:34 PM
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The factory stock Testarossa wheels specs are:
Front: 16" x 8" (inches) Offset 34.2mm (millimeters)
Rears: 16" x 10" (inches) Offset 59.6mm (millimeters)
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post #3 of 25 Old 12-08-2011, 11:59 PM Thread Starter
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Anyone got a pair of rear tyres?
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post #4 of 25 Old 12-09-2011, 10:23 AM
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Hi Andy,
I upgraded the brakes (F40 Brembo kit) and wheels to 18" on my TR, don't know the offsets. If you jump to 18" wheels, you ought to upgrade the brakes as well IMHO.

HRE Type 547 18" wheel, front fully polished 2 @ $2,908.00
HRE Type 547 18" wheel, rear fully polished 2 @ $3,093.99
Tire Rack Pirelli 235/40-18 PZero 2 @ $424.01
Tire Rack Pirelli 295/35-18 PZero 2 @ $ 598.00
Race-Tech Brembo brake kit 1 @ $7,000.00
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post #5 of 25 Old 12-09-2011, 11:05 AM
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Andy- Those wheels are an inch too narrow in the rear and will tend to make your TR scarey at the limit. TRs already have a fairly good dose of trailing throttle and power on oversteer with that high CG. You do not want to make it any worse.

The best looking upgrade I have seen for TRs is a set of the OEM 512 TR wheels, which are 18", bolt on, and offer multiple good tire choices.

If you keep your OEM wheels, or upgrade to the 512 wheels, I would recommend Michelin Pilot Sport 2 (PS2) tires if they have the correct sizes.

There are three different wheels for 5 bolt TRs offered here:

http://www.carobu.com/catalog/assets...st_2011-3-.pdf

Taz
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post #6 of 25 Old 12-09-2011, 11:35 AM
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The 3 Piece 19 Trepezzo Racing Wheels look similar to my 18" HRE 547s.

Unless he upgrades to bigger brakes, it will leave a huge void behind 18 or 19-inch wheels and look silly in my opinion.
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post #7 of 25 Old 12-09-2011, 09:10 PM
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One step at a time. Have to have bigger wheels before you can have bigger brakes. Unless of course, you want to have a car with big brakes on jack stands. The brakes on the 512 TR are not huge at 315 mm F and 310 mm R, and they do not look silly with 18" wheels. The TR brakes are not that much smaller at 309 mm F and 310 mm R.

Taz
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Every day I look around, and if nobody is shooting at me, it is a pretty good day.
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post #8 of 25 Old 12-11-2011, 07:50 PM Thread Starter
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Thanks guys,
I really dont like the idea of 9" rears so.
I think the best would be standard replacment rear tyres and sell it and get a 512TR. Maybe?
I do agree it is not fun at the limit with the current NCT goodyear tyres that are old and hard.
Andy
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post #9 of 25 Old 12-12-2011, 05:33 PM
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Where are you guys getting this idea of "9 inch rears" from? Mr. 360 Modena's post listed his tire sizes as 235 front and 295 rear, which are about the same as the 512TR tire sizes? Am I missing something?

On my TR I'm running a set of 360 Wheels with 225 fronts and 275 rears. I think it modernizes the look of the car.
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post #10 of 25 Old 12-12-2011, 05:42 PM
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CG- We read Andy's original post and answered it. 360 wheels are 7.5" F and 10" R vs TR wheels at 8" F and 10" R, like you noted above, so your set-up will tend to increase understeer and lower overall cornering power, but probably not enough to notice. Personally, I would go for wider than stock wheels rather than narrower. Have done that on my V12.

Thanks for the offset info on the TR. Will have to add that to my list. Do you know what it is for the 512 TR and the F512M?
Attached Files
File Type: doc Ferrari Wheel Sizes.doc (29.5 KB, 279 views)

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Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.

Last edited by tazandjan; 12-12-2011 at 05:48 PM.
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post #11 of 25 Old 12-13-2011, 03:55 PM
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Hi TAZANDJAN....I run 225 wide tires on the fronts, so the contact patch is the same as the original Testarossa tires. Below is the offset information you asked about....

Testarossa:
Front Wheel Size: 16" X 8" (inches) Offset: 34.2mm (Millimeters)
Rear Wheel Size: 16" X 10" (inches) Offset: 59.6mm (Millimeters)

512TR and F512M:
Front Wheel Size: 18" X 8" (inches) Offset: 46.0mm (Millimeters)
Rear Wheel Size: 18" X 10.5" (inches) Offset: 81.75mm (Millimeters)
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post #12 of 25 Old 12-13-2011, 08:16 PM
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CG- Thanks, I will add them to my list.

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
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post #13 of 25 Old 03-23-2013, 01:19 AM
 
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360 Modena, how did you change the engine cover...it's really stunning!!! Thank you
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post #14 of 25 Old 03-23-2013, 09:57 AM
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Thanks
Yes, the carbon fiber glass deck does upgrade the TR looks IMHO.
Got the idea from my 360

Bought it from Northwoods in TX
$1800 plush shipping
Goggle them for their website

Screws align perfectly and it takes but 5 minutes to replace
Third brake light is larger than stock and comes prewired

I get a lot of favorable compliments but FCA will deduct concours points

I often thought the should have a separate class for modified Ferraris.

PM me if you need any help finding Northwoods
They are a very reputable firm

Post a pic if you modify your car please

Good luck!
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post #15 of 25 Old 03-23-2013, 10:00 AM
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Thanks
Yes, the carbon fiber glass deck does upgrade the TR looks IMHO.
Got the idea from my 360

Bought it from Northwood in TX
$1800 plush shipping
Goggle them for their website

Screws align perfectly and it takes but 5 minutes to replace
Third brake light is larger than stock and comes prewired

I get a lot of favorable compliments but FCA will deduct concours points

I often thought the should have a separate class for modified Ferraris.

PM me if you need any help finding Northwood
They are a very reputable firm

Post a pic if you modify your car please

Good luck!
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post #16 of 25 Old 03-23-2013, 12:00 PM
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Forgot to make the TR/512 TR/F512M changes on the wheel document. Here they are.
Attached Files
File Type: doc Ferrari Wheel Sizes.doc (31.0 KB, 265 views)

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.
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post #17 of 25 Old 10-21-2013, 10:10 AM
 
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I have a set of oem wheels and good rubber 88 Testarossa, for the person who is looking for rear tires
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post #18 of 25 Old 04-15-2014, 03:45 PM
 
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Hello guys. I have a 1989 TR and just purchased a set of OEM Speedline 512M wheels. Will they just bolt on, or will I need to add spacera? I read that Ricambi sells a kit made by Hills Engineering, but was not sure if that was necessary or not.

Any help is appreciated.
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post #19 of 25 Old 04-15-2014, 05:03 PM
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Welcome to Ferrari Life. I believe the TR owners are using spacers on the 512 TR wheels. Let me see if I can find the ones they are using.

Consensus seems to be 11 mm F and 22 mm R Hill Engineering Type I spacers with longer bolts for the 512 TR wheels and the F512M wheels are exactly the same sizes and offsets.

Show us some photos when fitted. Have never seen a TR with F512M wheels.

Testarossa

Five Spoke 16”, 5 X 108 mm
Front 8J x 16 ET 34.2 mm, Rear 10J x 16 ET 59.6 mm

512 TR/F512M

Five Spoke 18”, 5 X 108 mm
Front 8J x 18 ET 46 mm, Rear 10.5J X 18 ET 81.75 mm

Taz
Terry Phillips

Present: 575M 135171
Past: Dino 246 GT 02984, 365 GTB/4 14009, 308 GTS 25125

Every day I look around, and if nobody is shooting at me, it is a pretty good day.

Last edited by tazandjan; 04-15-2014 at 05:11 PM.
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post #20 of 25 Old 05-22-2014, 10:32 PM
 
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tr wheels

Hi guys,
I have later 512 wheels on my 89 so they are 18". Went to order studs from hills engineering and they queried the studs I was ordering. Turns out my existing studs were wrong in that they had way to much thread. So, I measured everything for them to get it right. My spacers are 15mm front and rear where the rear tyres are 295's and fronts are 235's.

On another matter-down here in Oz can't readily get the original spec AGIP engine oil. You guys got any thoughts/alternatives?

Cheers,

It's not the wheels that kill you, it's where you're standing!
other drives-jaguar XJS V12, Etype Series 1, XJ6, Jensen Intercepter II, Audi A6 3.0L supercharged, Audi Q7 oiler
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