Porsche Enthusiasts Club Forum

I have just won a set of 16" turbo tele-dials on Ebay.
They are 7" width front and 8" on the back.

I currently have a set of Milla Miglia 17" wheels on my car and i was wondering what sort of tyre the car would have originally come with?

Is there any way of getting the profile of the tyre lower ?

Here is a picture that the previous owner kindly gave me when the car had its original set of tele-dials on.

Sorry mate couldn't find tyre type only the sizes "Wheels & Tyres: Front: 16x7J with 205/50VR16 tyres. Rear: 16x8J with 225/50VR16 tyres " Only info Porsche Archive had. I'm sure there's a topic on here about recommended tyre's from Porsche from the current brands. Having a lower profile would mess up the geometry and speed sensors wouldn't it?

An over all smaller diameter would make the speedo read faster, but it could also increase acceleration, but you may lose some top end speed in each gear. I think you be looking at 55/50 side wall which is a percentage of the tires and rim width. There are tire caluotors online, which can tell you how much out it will change your speedo. Modern cars are set over on purpose.

I've found a source for tyres now and he has sets of tyres for a great price.

I asked him for 205/50/16 and 225/50/16 and he has these in Continental, Bridgestone, Pirelli, Dunlop, Toyo or Michelin.

Which would you guys recommend? All the same price - My heart tells me to go with the Conti's.


I have also been told that 225/50/16 and 245/45/16 will fit on my car. What difference will this make to the car and is it worth hunting these out?

205/50 16 and 225/50 16 have very different rolling radiuses.
If you want all four wheels to be going round at the same speed, which is something that ABS sensors very much prefer, you should consider 205/55 16 and 225/50 16. Then the actual sidewall depth will be pretty much the same, front and rear.

205/55 16 and 225/50 16 are the usual front / rear sizes for road use on early Turbos or S2s, and have very similar rolling radius / revolutions per mile. They will be fine on 7J fronts and 8J rears.

Similarly late Turbos are on 225/50 16 front and 245/45 16 rear so that the sidewalls are the same depth, the wheels are all the same radius and therefore rotate the same at the same speed. The late Turbo wheels are 7.5J and 9J width but you would probably find that you were OK using those tyre sizes on your 7J and 8J. However, for normal road use I actually prefer the early Turbo / S2 sizes: you still get plenty of grip, the unsprung weight is a little lower, which improves the ride a little, plus you have lower aerodynamic drag and rolling resistance, greater resistance to aquaplaning, and better steering feel.

This Toyo chart for the T1-R range is a useful guide to what sizes are equivalent radius, and what is recommended for fitting on what width of rims:
http://www.toyo.co.uk/productdetail.php ... oduct_id=2

Thanks Lowtimer. Your words have made me place an order for my new tyres.
Teledials will be on the car on Oct 9th.

I went for 205/55 16 and 225/50 16 to keep true to the age of the car.

Thanks for your help.

Rav,
My 220 runs teledials and stock tyres, don't bugger about with the sizes as Porsche Engineers knew what they are doing.
Early offset Turbos did not have ABS.
You have selected the correct sizes, mine is fitted with Toyo, not sure what the original brand was, my guess would be Dunlop or Conti ?
Jim.

Frenchy - I will stick with the original sizes for exactly that reason. The Porsche engineers knew what they were doing.

My car came with a original sales list. The period tyres were dunlop, but i think i will go for Continentals.