993 Faq Frequently Asked Questions about the Porsche 1994-1997 993

02/25/2004

What are N-rated tires?

Filed under: Tires — admin @ 5:56 pm

Porsche works with tire manufacturers to test and develop tires which are suitable for the increased performance capabilities of Porsches. These are typically indicated by an “N” code of N0, N1, N2, N3, etc. The numerics are revision numbers, and by themselves are not meaningful, i.e., an N2 revision isn’t neccessarily better than an N1 revision. What is important is that Porsche recommends that all 4 tires be the same brand and the same “N” number, for the most consistent handling.

12/15/2002

What are the recommended tire pressures?

Filed under: Tires — Jeff 993TT @ 5:40 pm

According to the owner’s manual, all pressures are cold pressures.

    Carrera Turbo
Summer Tires      
front 16″ wheels
17″ wheels
18″ wheels
36 (2.5)
36 (2.5)
36 (2.5)
 
 
36 (2.5)
rear 16″ wheels
17″ wheels
18″ wheels
44 (3.0)
36 (2.5)
44 (3.0)
 
 
44 (3.0)
Snow Tires      
front 16″ wheels
17″ wheels
36 (2.5)
36 (2.5)
 
36 (2.5)
rear 16″ wheels
17″ wheels
44 (3.0)
36 (2.5)
 
44 (3.0)
Collapsible spare tire front and rear 36 (2.5) 36 (2.5)

Wheel balancing

Filed under: Tires,Wheels — Jeff 993TT @ 4:58 pm

Improper wheel balancing often leads to vibration at highway speeds. The best machine for wheel balencing is the Hunter GSP 9700. Find a shop which carries this machine if you want the best wheel balance.

The GSP9700 simulates a “road test”, with a unique “load roller” which applies up to 1400 lbs of force against the rotating assembly. The roller measures the loaded runout of the assembly (deflection while under load) and automatically recommends corrections when needed. The GSP9700’s technology eliminates many of the time consuming, subjective and often non-productive manual measurements previously used to diagnose and repair ride disturbance concerns.

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Where to buy tires

Filed under: Tires — Jeff 993TT @ 4:56 pm

Generally, the best place to buy tires is www.tirerack.com. The tires can be dropped shipped to your wheel installer. Prices are usually better than what the tire installer can get the tires for.

Tirerack.com

In Europe, the Delticom chain is the cheapest chain around. 12 european countries have their own URLs so it is not obvious that they are related. You can get to the other countries from any one of the sites. To start off, try:

www.reifendirekt.de
www.mytyres.co.uk

Popular tire choices

Filed under: Tires — Jeff 993TT @ 4:42 pm

Here are some popular tire choices. Best brands depend on many factors and many times, there will be tradeoffs. However, one thing is common, you will changing tires a lot, so you can try out many different brands. Our 993’s usually eat pair of rear tires every 10K miles and a pair of fronts every 15K miles. Faster if you go to the track. Even faster if you are faster at the track. 🙂

Mostly street and light track/DE:
Pirelli P-Zero
Bridgestone S02A – Same compound as the S03 but better tread design
Bridgestone S03 – Mostly street tire, quieter with less grip than the S02A’s
Michelin Pilot Sport 2 – Good general performance tire, with decent grip. My personal favorite. However it is nosier than the Bridgestones.

Track only:
Michellin Pilot Sport Cup R Compound tire. Our “expert” racers here swear by it and tests confirmed it.

Another favorite is the Kumho types for their low price and good traction. The latest polls show that although the Michellin is more expensive on the long run they last longer hence you will save money.

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