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I’m going to run a set of late Teledial rims. Going 16x7 front and 16x8 rear. If I go with the stock 944 turbo s tire sizes the rear would be 245/45/16. There are not any great options for tires in that size. I could just go with the 225/50/16’s but was looking for a wider tire for the rear. I was wondering what sizes people running with this combination
Last edited by MajorHavoc; 06-14-2023 at 11:31 AM.
With stock sizes you have very limited options with a 245 section- about 6 in total as I recall and they are not cheap options either.
You can improve the options available considerably by increasing the profile size to 245x50 and that will take the diameter from 25.0 inches to 25.7 inches and result in a speedo error of about 3% - I have run with rubber up to 26 inches on the rear wheel and it is no big deal as long as you take into account the speedo error it induces. but then I do not run with stock wheels, mine are much wider and I run with 265x35x18's all round at the moment. I have run with 285x35 on the rears that amount to about 26 inches diameter- I need 285x30 to get to the speedo calibrated diameter of 25.0 inches.
I’m going to run a set of late Teledial rims. Going 16x7 front and 16x8 rear. If I go with the stock 944 turbo s tire sizes the rear would be 245/45/16. There are not any great options for tires in that size. I could just go with the 225/50/16’s but was looking for a wider tire for the rear. I was wondering what sizes people running with this combination
Wider is not always better. Pick a tire with ample load capacity at-least 1600 to 1800 LBS first. There was a very detailed tire test where they tested various tire width on the same size rim too in another one of their videos. .
A really good 225 with the right load capacity is going perform as well or better than a marginal 245. You'd be well served with a really good premium set of 225's all around.
To up your 928 road game, take the time to look at the 928 suspension as a whole and make sure it's right. Alignment, bushings etc. For example in my case a new set of rocker bar bushing did way more for the precision and road hold ability of my 928 than wider tires ever could have done on their own.
I already have 225 tires. I may try the 245/50/16 tires. My Speedo is already off with stick tires. And it’s not about performance. My car is not a fast car. It a driver. And I want the look of a little wider tire if I going with 16x8’s in the rear.
I already have 225 tires. I may try the 245/50/16 tires. My Speedo is already off with stick tires. And it’s not about performance. My car is not a fast car. It a driver. And I want the look of a little wider tire if I going with 16x8’s in the rear.
Well, I have the same rims on my '79 and I run 225/50 and 245/50 with 21mm spacers in the back. Looks great and handles well. In my opinion, you have nothing to loose. You'll have a better looking & handling car.
There is a huge variety of what people use for tires, on their 928.
Some people have it figured out and some are clueless.
However, you are on an good path.
And 245/45 is the correct tire for the 8" wheel and for the rear of a 928. (However, if you could match the brand of your 225/50's with a 245/50 in the same brand of tire, that is worth a long thought.)
For me, the most important thing is to match the brand and style of tire on both ends of the car...so that you end up with similar handling characteristics on both ends (if possible.).
All of the 928 models understeer, by design. And most modifications people make to 928s tend to increase this tendency.
While not a serious issue for people driving around casually on the street, you have to be somewhat careful not to increase this understeer if driving anywhere near the limits of the car...or if you ever encounter any type of inclement weather..
In short, you don't want to run a wider "sticky" tire on the rear with an older "less sticky" tire in the front.....it becomes pretty simple to end up in someone's yard....front first.
If you can match your existing fronts with a 245/50 rear...that's probably the best option.
While the sidewall construction of most of the 245/50 tires is not optimum for the rear of a 928, it's certainly close enough for what you intend to use the car for.
If you can't match your 225/50 tires, you might take a look at the Bridgestone Potenza Sport 245/45's.
Not crazy sticky and reasonably priced.
I really like the Toyo Proxy R - 225/50 - 16 front, 245/45 - 16 rear.
Lately they are hard to find in Aus, so I fitted Nankang NS20 in front and Nankang AS2+ rears. Same sizes as original.
For road use I am pretty impressed with them. Good grip and very quite. And not expensive.
On that Phonedials setup I ran BF Goodrich Comp T/As in 225/55-16 and 245/50-16 which makes the fronts and rears almost identical in diameter like an original square setup would be. They make both the regular and all season in those sizes. They worked quite well for me.
16x7 et 65 928 Phonedials on the front and 16x8 et 23.3 951 (944 turbo) on the rear.
Nice, my wheels are all et 52.3. I have a set in new 245/50/16’s being delivered this morning I’ll mount up and see. Hey are a different brand than the fronts and if I like them I’ll get the matching fronts.
Well I got them done and on. There is no way you could run a 21mm spacer with the et52.3 rims on my car. I can just get my hand between the tire and the quarter panel.
I am sure my rims are et52.3 but regardless, what matters is that you`re happy with what you got and that it works for you.
Well it would be next to impossible to run a 21mm spacer and have 52.3 offset 8” rims. My car is an 83 and I have only a 3/4” maybe from tire to quarter panel.
06-14-2023, 11:12 AM
16x8 Tire Size help
