Subject: Winter Tire – Wheel Rim Summary Models: 911/911 Carrera/911SC/911 Turbo/912
Bulletin Number: 84 – 02
Listed below are winter tires / wheel rims suitable for Porsche vehicles.
Recommended winter tires and matching wheel rims (all pervious information is through this bulletin superseded.
Type: 924, 924 Turbo, 944 – 1984/85
| Tire Size | Tire Make | 912, 911 All | Rim Size 911SC, Carrera, 911 Turbo | Remarks |
| SR Winter tires up to 160 km/h [100 mph] 185/70 SR 14 M + S 86 Q or 88 Q | Goodyear Ultra Grip III Continual Contact TS740 Michelin XM + S 100 Uniroyal M + S Plus | . | 5 ½ J x 14 (not for 911 Turbo since 1978 models) | Only for cars which 15” series 50 summer tires as standard equipment. It is better to replace speedometer and mount 185/70 HR 15 M +S tires. |
| HR Winter Tires up to 190 km/h {118 mph} 185/70 HR 15 M + S 88 T | Continental Super Contact TS730 Vredestein + Pirelli Winter 190 | 5 ½ J x 15 or 6 J x 15 front and rear | 6 J x 15 front and rear or 6 J x 15 front 7 J x 15 rear 7 J x 15 front and rear | |
| 185/70 HR 14 M + S 88 T Or 86 T Or 87 T | Pirelli Winter 190 Uniroyal M + S Super Plus T Goodyear Ultra Grip III Semperit Hi Grip M529 | . | 5 ½ J x 14 (not for 911 Turbo since 1978 models) | Only for cars which have 15” series 50 summer tires as standard equipment. It is better to replace speedometer and mount 185/70 HR 15 M +S tires. |
| 205/55 HR 16 M + S 88 T | Pirelli Winter 190 | 6 J x 16 | 6 J x 16 front and rear or 6 J x 16 front and 7 J x 16 rear or 7 J x 16 front and rear | Not for cars which have 15” series 50 summer tires as standard equipment. Steering lock stop required by installing cover holder, Part No. 911.347.056.00 (except 911SC, Carrera 3.0 since 1977 models and 911 Turbo) |
| 185/70 HR 15 M + S 88 T front 215/60 HR 15 M + S 90 T rear | Pirelli Winter 190 | . | 6 J x 15 front and 7 J x 15 rear or 7 J x 15 front and 8 J x 15 rear | |
| 205/55 HR 16 M+S 88 T front 225/50 HR 16 M + S 92T rear | Pirelli Winter 190 | . | 6 J x 16 front and 7 J x 16 rear or 7 J x 16 front and 8 J x 16 rear | Not for cars which have 15” series 50 summer tires as standard equipment. Steering lock stop required by installing cover holder, Part No. 911.347.056.00 (except 911SC, Carrera 3.0 since 1977 models and 911 Turbo) |
Inflation Pressure for Winter Tires
Type Tire Inflation Pressure Rear Wheels
(cold) Front Wheels
912 2.0 bar (29 p.s.i.) 2.4 bar (34 p.s.i.)
911 2.0 bar (29 p.s.i.) 2.4 bar (34 p.s.i.)
911SC + Turbo
3.0 Itr 2.0 bar (29 p.s.i.) 2.4 bar (34 p.s.i.)
911 Carrera
(since 1984) 2.0 bar (29 p.s.i.) 2.5 bar (36 p.s.i.)
911 Turbo
3.3 Itr. 2.0 bar (29 p.s.i.) 3.0 bar (44 p.s.i.)
Always use new rubber valves or tubes when replacing tires. Rubber valve Part No. 900.265.001.50
Always coat tire beads with rubber lubricant when mounting tire on rim.
Work sequence
- Install new valve stern and remove insert
- Install tire on rim and inflate to 4.0 bar (60 psi)
- Ensure tire is seated on rim
- Install valve stern insert and inflate tire to correct pressure.
Tire And Tubes
Do not use tubes and tires of different makes. Tubes are not available for series 50/55 tires.
Tubeless tires should only be mounted with tubes in an emergency situation.
New Tire Instructions
Always use tires of the same make and type.
When changing tires of an axle set, new tires should be mounted on wheels of front axle
If replacing only one tire of an axel set, the difference in tread depth between tires must not exceed 30%
d. Part No. 999.182.003.36 aluminum, for all Porsche rims with 5 mounting holes (especially aluminum rims) tightening torque 130 Nm (13 mkp)
e. Part no. N.020.121.1 or 900.182.001.01 steel, for all rims with 5 mounting holes (especially steel rims) tightening torque 130 Nm (13 mkp)
Aluminum wheel nuts (d)
Aluminum wheel nuts require special care.
Before installing:
- Lubricate threads and shoulders of aluminum nuts with Optimoly HT, Part No. 999.917.728.00 (Optimoly HT does not affect tightening torque)
Note
Tighten and loosen aluminum nuts with a socket that grasps entire depth of nut.
Break-In time for new tires
New tires have a vulcanization skin that can cause poor vehicle handling. Handling characteristics improve measurably during the tire break-in period of 600 miles (1000 km).
Vehicle handling characteristics should not be evaluated immediately after tire replacement.
Driving conservatively during the first 600 miles (1000 km) will help to maximize tire life.
After the break-in period, check wheel balance.
Obtain even tire wear by rotating tires after 3000 miles (5000 km).
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