what is the largest size tires I can get on my 944s. Rims are 7" front and 8" rear 968 rims. They have 225/50-16 and 245/45-16 on them now. Can I go wider safely?

 

On those wheels, no.

In terms of what the wheel wells can fit, with proper offsets, you can run 255/295.

 

Any idea what the largest would be without offsets?

 

Why? You don't have 500rwhp, you've got plenty of tire now for what you need to do...

 

most tire manufacturers reccomend at least a 8.5" rim to run 255s, besides you aren't going to find a wider tire than 245 for 16" rims

 

What you have is about as wide as you can get. There isnt much call for wider 16" tires anymore. No one uses 16s on any kind of performance car these days sadly.
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More rubber means more rotating weight and more friction on the ground = slower car.

If you are trying to increase handling (for the autocross in your avatar) get some super low profile gumball tires - at the stock size the car will be glued to the road.

 

did that. Just got kumho ecsta v710 in 225/50-15 for the autocross. I hear they should be 1-2 aseconds faster than the Victoracers

 

The 710's are impressive, I drove a friends Miata at an autoX with 710's and was amazed compared to the Victoracers on my car. I'll be going to the 710's when / IF the Victoracers ever wear out.

 

Man this should be an interesting season for the P3 (944 class) at MetroNY events. Dan and i hare pulling out the big guns in terms of upgrades.

 

Got my sways today!!

 

I put my 19mm M030 rear bar on yesterday, I'll be getting the front 30mm in the next few weeks. I need street tires first. Can't wait til next autoX.