122-W3U5D-03
Service Bulletin Details
Public Details for: 122-W3U5D-03
List of approved wheels and tires for the 911.
Models from 2019
2019 PORSCHE 911 |
2019 PORSCHE 911 GT2 |
2019 PORSCHE 911 GT2 RS |
2019 PORSCHE 911 GT3 |
2019 PORSCHE 911 GT3 RS |
Models from 2017
2017 PORSCHE 911 |
2017 PORSCHE 911 CARRERA |
2017 PORSCHE 911 TARGA 4 |
2017 PORSCHE 911 TURBO |
4 911 (991) Technical Information 44/19 ENU 4400 Approved Wheels and Tires (44/19) Vehicle Type: 911 Carrera (991)/911 Targa (991)/911 Turbo (991) Model Year: As of 2017 Situation: Approval status: January 2018 Sizes: Permissible tire and wheel sizes (RO = rim offset in mm, FA = front axle, RA = rear axle) Tires Tire sizes Wheel sizes Snow chains 911 Carrera FA: 235/40 ZR 19 (92Y) RA: 295/35 ZR 19 (100Y) Summer - Not for vehicles with Porsche Ceramic Composite Brake (PCCB) FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL FA: 235/40 R 19 92V M+S RA: 295/35 R 19 100V M+S Winter - Not for vehicles with Porsche Ceramic Composite Brake (PCCB) FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S RA: 295/30 R 20 101V XL M+S FA: 8.5J x 19 H2, RO 50 RA: 11.5J x 19 H2, RO 76 FA: 8.5J x 20 H2, RO 49 RA: 11.5J x 20 H2, RO 76 No No No FA: 8.5J x 19 H2, RO 50 RA: 11J x 19 H2, RO 77 RA only FA: 8.5J x 20 H2, RO 49 RA: 11J x 20 H2, RO 78 RA only 911 Carrera S, 911 Carrera T Summer FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL FA: 8.5J x 20 H2, RO 49 RA: 11.5J x 20 H2, RO 76 AfterSales No No Feb 27, 2020 Page 1 of 16 4 911 (991) 4400 ENU Technical Information 44/19 Tires Tire sizes Wheel sizes Snow chains FA: 8.5J x 19 H2, RO 50 RA: 11J x 19 H2, RO 77 RA only FA: 8.5J x 20 H2, RO 49 RA: 11J x 20 H2, RO 78 RA only FA: 235/40 R 19 92V M+S RA: 295/35 R 19 100V M+S - Not for vehicles with Porsche Ceramic Composite Brake (PCCB) Winter - Not for vehicles with rear axle steering - Not for vehicles with Power Kit. FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S RA: 295/30 R 20 101V XL M+S 911 Carrera 4, 911 Targa 4 FA: 235/40 ZR 19 (92Y) RA: 295/35 ZR 19 (100Y) Summer - Not for vehicles with Porsche Ceramic Composite Brake (PCCB) FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL FA: 235/40 R 19 92V M+S RA: 295/35 R 19 100V M+S Winter - Not for vehicles with Porsche Ceramic Composite Brake (PCCB) FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S RA: 295/30 R 20 101V XL M+S FA: 8.5J x 19 H2, RO 50 RA: 11.5J x 19 H2, RO 56 FA: 8.5J x 20 H2, RO 49 RA: 11.5J x 20 H2, RO 56 No No No FA: 8.5J x 19 H2, RO 50 RA: 11J x 19 H2, RO 56 RA only FA: 8.5J x 20 H2, RO 49 RA: 11J x 20 H2, RO 56 RA only 911 Carrera 4S, 911 Targa 4S Summer Feb 27, 2020 Page 2 of 16 FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL FA: 8.5J x 20 H2, RO 49 RA: 11.5J x 20 H2, RO 56 AfterSales No No Technical Information Tires 4 911 (991) 44/19 Tire sizes ENU 4400 Wheel sizes Snow chains FA: 8.5J x 19 H2, RO 50 RA: 11J x 19 H2, RO 56 RA only FA: 8.5J x 20 H2, RO 49 RA: 11J x 20 H2, RO 56 RA only FA: 235/40 R 19 92V M+S RA: 295/35 R 19 100V M+S - Not for vehicles with Porsche Ceramic Composite Brake (PCCB) Winter - Not for vehicles with rear axle steering - Not for vehicles with Power Kit. FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S RA: 295/30 R 20 101V XL M+S 911 Carrera GTS, 911 Carrera 4 GTS, 911 Targa 4 GTS FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL Summer FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL Winter FA: 8.5J x 20 H2, RO 49 RA: 11.5J x 20 H2, RO 56 or FA: 9J x 20, RO 51 RA: 12J x 20, RO 63 No No FA: 8.5J x 20 H2, RO 49 RA: 11J x 20 H2, RO 56 FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S RA: 295/30 R 20 101V XL M+S - Vehicles without central wheel lock FA: 8.5J x 20 H2, RO 51 RA: 11J x 20 H2, RO 59 RA only - Vehicles with central wheel lock 911 Turbo, 911 Turbo S Summer FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL FA: 9J x 20 H2, RO 51 RA: 11.5J x 20 H2, RO 56 AfterSales No No Feb 27, 2020 Page 3 of 16 4 911 (991) 4400 ENU Tires Technical Information 44/19 Tire sizes Snow chains Wheel sizes FA: 8.5J x 20 H2, RO 49 RA: 11J x 20 H2, RO 56 - Vehicles without central wheel lock Winter FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S RA: 295/30 R 20 101V XL M+S - *) FA: 8.5J x 20 H2, RO 51 RA: 11J x 20 H2, RO 56 - Vehicles without central wheel lock FA: 8.5J x 20 H2, RO 51 RA: 11J x 20 H2, RO 59 - Vehicles with central wheel lock Wheels: Overview of Porsche wheels for summer and winter tires Identification on inside of wheel: Wheel size, rim offset (RO) in mm, part number (without colour code FFF) and Porsche logo 17-inch spare wheel (not shown) 5.5J x 17, RO 24 Part No. 996.362.120.03 19-inch spare wheel (not shown) 6.5B x 19, RO 28 Part No. 7P5.601.027.F 19-inch "Carrera 6" wheel FA: 8.5J x 19 H2, RO 50 Part No. 991.362.510.00_FFF RA: 11.5J x 19 H2, RO 76 Part No. 991.362.560.00_FFF RA: 11.5J x 19 H2, RO 56 Part No. 991.362.560.01_FFF RA: 11J x 19 H2, RO 77 Part No. 991.362.560.02_FFF RA: 11J x 19 H2, RO 56 Part No. 991.362.560.03_FFF Feb 27, 2020 Page 4 of 16 AfterSales RA only 911 (991) Technical Information 44/19 ENU 4400 4 20-inch "Carrera S4" wheel FA: 8.5J x 20 H2, RO 49 Part No. 991.362.710.00_FFF RA: 11.5J x 20 H2, RO 76 Part No. 991.362.760.00_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.760.01_FFF RA: 11J x 20 H2, RO 78 Part No. 991.362.760.02_FFF RA: 11J x 20 H2, RO 56 Part No. 991.362.760.03_FFF 20-inch "Carrera Classic II" wheel FA: 8.5J x 20 H2, RO 49 Part No. 991.362.711.02_FFF RA: 11.5J x 20 H2, RO 76 Part No. 991.362.761.04_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.761.05_FFF 20-inch "RS Spyder Design" wheel FA: 8.5J x 20 H2, RO 49 Part No. 991.362.712.00_FFF RA: 11.5J x 20 H2, RO 76 Part No. 991.362.760.04_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.760.05_FFF AfterSales Feb 27, 2020 Page 5 of 16 4 911 (991) 4400 ENU Technical Information 44/19 20-inch "Turbo 4" wheel FA: 8.5J x 20 H2, RO 49 Part No. 991.362.711.00_FFF FA: 9J x 20 H2, RO 51 Part No. 991.362.720.00_FFF RA: 11.5J x 20 H2, RO 76 Part No. 991.362.761.00_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.761.01_FFF 20-inch "911 Turbo III" wheel FA: 8.5J x 20 H2, RO 51 Part No. 991.362.161.06_FFF RA: 11J x 20 H2, RO 56 Part No. 991.362.166.09_FFF 20-inch "911 Sport Classic" wheel FA: 9J x 20 H2, RO 51 Part No. 991.362.162.41_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.167.42_FFF Feb 27, 2020 Page 6 of 16 AfterSales 911 (991) Technical Information 44/19 ENU 4400 4 20-inch "911 Carrera Sport" wheel FA: 8.5J x 20 H2, RO 49 Part No. 991.362.722.00_FFF/991.363.722.0 0_FFF RA: 11.5J x 20 H2, RO 76 Part No. 991.362.772.00 _FFF/991.363.772.00 _FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.772.01 _FFF/991.363.772.01 _FFF 20-inch "911 Turbo Sport 3" wheel FA: 9J x 20 H2, RO 51 Part No. 991.362.721.00_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.771.00_FFF AfterSales Feb 27, 2020 Page 7 of 16 4 911 (991) 4400 ENU Technical Information 44/19 20-inch "911 Turbo Sport II" wheel FA: 8.5J x 20 H2, RO 51 Part No. 991.362.161.34_FFF RA: 11J x 20 H2, RO 59 Part No. 991.362.166.34_FFF 20-inch wheel "CFRP" FA: 9J x 20 H2, RO 51 Part No. 991.362.723.01_FFF RA: 11.5J x 20 H2, RO 56 Part No. 991.362.773.01_FFF Information Improper handling can damage the wheel surface. Carry out tire removal and mounting using a bead holding-down device only. Use a leather pad on the rim flange to support the valve insertion tool. Only use the Porsche centering clamping set for balancing. Do not use brushes to clean the wheels because brushes can cause deep scratches that cannot be removed by polishing. Never use solvents or other chemical substances on tires. Information Feb 27, 2020 Page 8 of 16 AfterSales 911 (991) Technical Information Wheel Mounting: 44/19 ENU 4400 4 using wheel bolts: Tightening torque 160 Nm (118 ftlb.) using central wheel lock: Tightening torque 600 Nm (444 ftlb.) WARNING Driving with different tires (mixed tires) • Uncontrollable vehicle handling Only use tires of the same make and type, with the same speed index and the same specification code (N0, N1, N2, ...) on a vehicle. Summer Tires: Model Tire size FA: 235/40 ZR 19 (92Y) RA: 295/35 ZR 19 (100Y) 911 Carrera, 911 Carrera 4, 911 Targa 4 FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL Tire make and type Goodyear F1 Eagle Asymmetric 2 N0 (Inside/Outside) Yokohama Advan Sport V105 N0 (Inside/Outside) Pirelli P Zero N1 (Inside/Outside) Pirelli P Zero Corsa N0 (Inside/Outside) - Ultra High Performance tires FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL 911 Carrera S, 911 Carrera T, 911 Carrera 4S, 911 Targa 4S, 911 Carrera GTS, 911 Carrera 4 GTS, 911 Targa 4 GTS, 911 Turbo, 911 Turbo S FA: 245/35 ZR 20 (91Y) RA: 305/30 ZR 20 (103Y) XL Michelin Pilot Sport 4S N0 (Rotation) Pirelli P Zero N1 (Inside/Outside) Pirelli P Zero Corsa N0 (Inside/Outside) - Ultra High Performance tires FA: 245/35 ZR 20 (95Y) XL RA: 305/30 ZR 20 (103Y) XL AfterSales Michelin Pilot Sport 4S N0 (Rotation) Feb 27, 2020 Page 9 of 16 4 911 (991) 4400 Winter Tires: ENU Technical Information 44/19 Model 911 Carrera S, 911 Carrera T, 911 Carrera, 911 Carrera 4, 911 Carrera 4S, 911 Targa 4 911 Targa 4S 911 Carrera GTS 911 Carrera 4 GTS 911 Targa 4 GTS 911 Turbo 911 Turbo S Tire size Tire make and type Pirelli Winter 240 Sottozero Series II N0 (Inside/Outside) FA: 235/40 R 19 92V M+S RA: 295/35 R 19 100V M+S Continental WinterContact TS 830P N1 (Inside/Outside) FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S Pirelli Winter 240 Sottozero Series II N0 (Inside/Outside) FA: 245/35 R 20 91V M+S RA: 295/30 R 20 101V XL M+S Michelin Pilot Alpin PA4 N1 (Rotation) FA: 245/35 R 20 91V M+S RA: 295/30 R 20 97V M+S Pirelli Winter 240 Sottozero Series II N0 (Inside/Outside) FA: 245/35 R 20 91V M+S RA: 295/30 R 20 101V XL M+S Michelin Pilot Alpin PA4 N1 (Rotation) Arrow with inscription “Rotation” = directional mounting “Inside/Outside” inscription or “Left” or “Right” = mounting on specified side only Arrow with both inscriptions “Rotation” and “Inside/Outside” = directional mounting on specified side only. Arrow with both inscriptions “Rotation” and “Left” or “Right” = directional mounting on specified side only. Information The relevant legal regulations must be observed in the export countries! Information "N..." = Specification code of the tire, e.g. "N0", "N1", "N2" ... The complete “N ...” code of the tires in question must be shown on the tire sidewall near the tire type designation. Instructions for correct mounting of the tires are also given on the tire sidewall. If there are no mounting instructions on the tire sidewall, the tire must be mounted so that the DOT marking is visible from the outside. Feb 27, 2020 Page 10 of 16 AfterSales 4 911 (991) Technical Information 44/19 4400 ENU Information If a tire is damaged and it is not possible to determine with absolute certainty that there is no ply damage - with all of its consequences - or if the tire was thermally and/or mechanically overloaded due to a loss of pressure or other prior damage, replace the tire in question for safety reasons. Repairs to "V", "W", "Y" and "ZR" tires are not permissable, as well as the use of inner tubes in tubeless tires. Please inform your customers accordingly. It is advisable to mount winter tires at temperatures below 45° F/7°C , because the driving characteristics of summer tires are reduced at low temperatures. Extremely low temperatures can cause permanent damage to summer tires. Tire Pressure: WARNING Incorrect tire pressure • Uncontrollable vehicle handling Adjust the tire pressure according to specifications. Never allow the pressure to fall below the minimum pressure. Check age of tires. Replace tires that are more than 6 years old. Perform visual inspections. Use only tires recommended by Porsche. Information The tire pressure applies only to the tire makes and types approved by Porsche, and is specified for cold tires (approx. 68° F/20°C ). The tire pressures must never be lower than the specified values. Standard tire pressure for summer tires Wheel size 911 Carrera Part load 991 Carrera S, 911 Carrera T Full load Part load Full load FA RA FA RA FA RA FA RA 19-inch wheels 2.1 bar 210 kPa 30 psi 2.5 bar 250 kPa 36 psi 2.4 bar 240 kPa 34 psi 3.0 bar 300 kPa 43 psi – – – – 20-inch wheels 2.2 bar 220 kPa 31 psi 2.6 bar 260 kPa 37 psi 2.4 bar 240 kPa 34 psi 3.1 bar 310 kPa 44 psi 2.2 bar 220 kPa 31 psi 2.6 bar 260 kPa 37 psi 2.4 bar 240 kPa 34 psi 3.1 bar 310 kPa 44 psi AfterSales Feb 27, 2020 Page 11 of 16 4 911 (991) 4400 ENU Technical Information 44/19 17-inch spare wheel 2.8 bar (40 psi) 19-inch spare wheel 3.5 bar (50 psi) Wheel size 911 Carrera 4, 911 Targa 4 Part load 991 Carrera 4S, 911 Targa 4S Full load Part load FA RA FA RA FA RA FA RA 19-inch wheels 2.1 bar 210 kPa 30 psi 2.6 bar 260 kPa 37 psi 2.4 bar 240 kPa 34 psi 3.0 bar 300 kPa 43 psi – – – – 20-inch wheels 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi 2.4 bar 240 kPa 34 psi 3.1 bar 310 kPa 44 psi 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi 2.4 bar 240 kPa 34 psi 3.1 bar 310 kPa 44 psi 17-inch spare wheel 2.8 bar (40 psi) 19-inch spare wheel 3.5 bar (50 psi) Wheel size 20-inch wheels 911 Carrera GTS, 911 Carrera 4 GTS, 911 Targa 4 GTS Part load 911 Turbo, 911 Turbo S Full load Part load Full load FA RA FA RA FA RA FA RA 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi 2.4 bar 240 kPa 34 psi 3.1 bar 310 kPa 44 psi 2.4 bar 240 kPa 34 psi 3.0 bar 300 kPa 43 psi 2.6 bar 260 kPa 37 psi 3.3 bar 330 kPa 47 psi 19-inch spare wheel 3.5 bar (50 psi) Standard tire pressure for winter tires Feb 27, 2020 Page 12 of 16 Full load AfterSales Technical Information 44/19 911 Carrera, 911 Carrera S, 911 Carrera T, 911 Carrera 4S, 911 Targa 4, 911 Targa 4S Wheel size 4 911 (991) Part load 4400 ENU 911 Carrera GTS, 911 Carrera 4 GTS, 911 Targa 4 GTS Full load Part load Full load FA RA FA RA FA RA FA RA 19-inch wheels 2.2 bar 220 kPa 31 psi 2.3 bar 230 kPa 33 psi 2.2 bar 220 kPa 31 psi 2.6 bar 260 kPa 37 psi – – – – 20-inch wheels 2.2 bar 220 kPa 31 psi 2.5 bar 250 kPa 36 psi 2.2 bar 220 kPa 31 psi 2.9 bar 290 kPa 42 psi 2.2 bar 220 kPa 31 psi 2.5 bar 250 kPa 36 psi 2.2 bar 220 kPa 31 psi 2.9 bar 290 kPa 42 psi 911 Turbo, 911 Turbo S Wheel size Part load 20-inch wheels Full load FA RA FA RA 2.2 bar 220 kPa 31 psi 2.5 bar 250 kPa 36 psi 2.2 bar 220 kPa 31 psi 3.0 bar 300 kPa 43 psi Comfort tire pressure for summer tires up to 270 km/h (165 mph) – only for vehicles with Tire Pressure Monitoring (TPM) and “Comfort pressure” menu in the multi-function display (depending on the country) WARNING Driving at high speed with low tire pressure • Irreparable damage to tires Set Comfort air pressure for tires only on vehicles with Tire Pressure Monitoring System (TPMS) and “Comfort” selected in the "Tire pressure" main menu in the multi-function display. Wheel size 911 Carrera Part load 911 Carrera S, 911 Carrera T Full load Part load Full load FA RA FA RA FA RA FA RA 19-inch wheels 2.0 bar 200 kPa 29 psi 2.2 bar 220 kPa 31 psi 2.1 bar 210 kPa 30 psi 2.6 bar 260 kPa 37 psi – – – – 20-inch wheels 2.0 bar 200 kPa 29 psi 2.2 bar 220 kPa 31 psi 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi 2.0 bar 200 kPa 29 psi 2.2 bar 220 kPa 31 psi 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi AfterSales Feb 27, 2020 Page 13 of 16 4 911 (991) 4400 ENU Technical Information 44/19 911 Carrera 4S, 911 Targa 4S, 911 Carrera GTS, 911 Carrera 4 GTS, 911 Targa 4 GTS 911 Carrera 4, 911 Targa 4 Wheel size Part load Full load Part load Full load FA RA FA RA FA RA FA RA 19-inch wheels 2.0 bar 200 kPa 29 psi 2.3 bar 230 kPa 33 psi 2.1 bar 210 kPa 30 psi 2.6 bar 260 kPa 37 psi – – – – 20-inch wheels 2.0 bar 200 kPa 29 psi 2.3 bar 230 kPa 33 psi 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi 2.0 bar 200 kPa 29 psi 2.3 bar 230 kPa 33 psi 2.2 bar 220 kPa 31 psi 2.7 bar 270 kPa 39 psi 911 Turbo, 911 Turbo S Wheel size 20-inch wheels Part load Full load FA RA FA RA 2.2 bar 220 kPa 31 psi 2.5 bar 250 kPa 36 psi 2.3 bar 230 kPa 33 psi 2.8 bar 280 kPa 40 psi Snow Chains: WARNING Incorrectly installed snow chains • Uncontrollable vehicle handling Do not exceed the maximum speed of Speed 30 mph/50 km/h. Observe installation instructions from the chain manufacturer. Porsche offers the following snow chains as accessories: Tire size 295/35 R 19 M+S 295/30 R 20 M+S Wheel Storage: • • • • Feb 27, 2020 Page 14 of 16 Porsche Part No. Type of snow chain 991.044.600.00 Link-type chain, quick fit Tires must be stored in a cool, dry and dark room with adequate ventilation. Tires must never come into contact with fuel, oil, grease or chemicals. Do not store summer tires in storage areas with ambient temperatures of less than 5° F (-15° C). Complete wheel & tire assemblies can be stacked for storage; we recommend that you increase the tire pressure by approximately 6 psi (0.4 bar). AfterSales 911 (991) Technical Information • • • • General Information: • • • • • 44/19 ENU 4400 4 Optimum conditions for storage of the complete wheels are provided by the Original Porsche storage trolley, Part No. 000.044.000.38. If the tires are not mounted on wheels, it is best to store them in a vertical position. We recommend that you turn tires stored in this position every two weeks in order to prevent flat spots. Tires that are stacked in a horizontal position will become severely deformed and cannot be seated properly in the rim flange when they are mounted. Always use new valves when changing tires. Always observe any possible instructions concerning the rolling direction and/or specifying which side the tires must be mounted on. Coat the tire beads and humps with mounting lubricant before mounting the tire. This ensures that the tire beads will slide over the humps easily. In order to prevent the tire from turning on the wheel, avoid extreme driving maneuvers (acceleration and braking) during the first 100 to 200 miles with new or recently mounted tires. In order to optimize smoothness of rolling, it is appropriate - and necessary in individual cases - to mount the tire in a certain (favorable) position with respect to the wheel (matching). Matching (uncontrolled and controlled) is explained below: Uncontrolled matching: • Turning the tire on the wheel by 90° or 120° if necessary in order to achieve an acceptable value with regard to rolling smoothness (true running, imbalance and weight distribution of balance weights). Controlled matching: • • • With a balancing machine with matching program. In most cases, this produces aneven better result with regard to the rolling smoothness (true running, imbalance and weight distribution of the balance weights) than can be achieved with uncontrolled matching. Maximum permissible radial runout and lateral runout of the wheels < 0.7 mm. Maximum permissible radial runout and lateral runout of the wheels with tires < 1.25 mm. Values < 1.50 mm -ideally approx. 0.5 mm - are desirable. The mounting pressure (seating pressure) of 58 psi/4.0 bar overpressure must not be exceeded before both tire beads are evenly seated on the rim flange. New Tires (Replacements): • • • • If new tires are to be mounted or the tires of one axle are to be replaced, tires of the same make, type and with the same specification code must always be used on each of the two axles. If tires are replaced on one axle only, the different tread depth from that on the other axle can cause a noticeable change in the familiar handling. This is especially the case if new tires are mounted on the rear axle. This effect decreases with increasing tire mileage. When replacing a tire on an axle, make sure that the tread depth of the new tire does not differ from that of the other tire by more than 30 %. Refer to WM 449503 for specific details of the vehicle you are working on. AfterSales Feb 27, 2020 Page 15 of 16 4 911 (991) 4400 ENU • • Technical Information 44/19 >The 2mm specification will be given here. > If there is none listed then the default is 30%. Repairs to Tires: • • If a tire is damaged and it cannot be determined with absolute certainty that there is no ply damage - with all of its consequences - or if the tire was thermally or mechanically overloaded due to a loss of pressure or other prior damage, we recommend replacement of the tire in question for safety reasons. Repairs on “ZR” tires are not permissible, as is the use of inner tubes in tubeless tires. Tire Aging: • • • • • • • Tires age due to chemical and physical processes, which can impair their function. Tires that are stored unused for an extended period harden and become brittle faster than tires that are in continual use. Hairline aging cracks can occur on older tires. On tires in continual use, the kneading action activates the plasticizer in the rubber and thereby prevents hardening and cracking. Therefore, attention should be paid not only to the tread depth but also to the age of the tire. Tires should not be older than 6 years. The age of the tire can be determined via the DOT code on the sidewall, which indicates the production date of the tire: e.g. DOT 2201= 22nd week of 2001. Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed. © 2020 Porsche Cars North America, Inc. Feb 27, 2020 Page 16 of 16 AfterSales