Wheels - Modifying 16 Inch Wheel to 17 Inch Wheel
Group4
Number
9303
Model
4 Cylinder
Part Identifier
4412
January 19, 1993
ATTENTION:
Service Manager/Service Technician
Models Affected:
944 from 1987 with M30 option
944S from 1987 with M30 option
944 T from 1987 with M30 option
944 Turbo S 1988
944 Turbo 1989
944 S2 from 1989
Concern:
Installing 17" Porsche wheels on vehicles previously equipped with 16" wheels.
Installation Information:
a. Front and rear fender well lips must be reworked and/or checked for adequate tire clearance.
b. Suspension travel must also be checked, parts such as brake lines, hoses and brackets must have adequate clearance.
c. New caster eccentrics, rear mounts and nuts must be installed in the front control arms. This change is necessary due to a change in caster specification on vehicles equipped with Porsche 17" wheels. The specification for vehicles equipped with 17" wheels is 30 15'-45'.
d. When adjusting vehicles to new caster specification, all alignment values should be checked at that time.
e. When summer tires are used on vehicles with 17" Porsche wheels snow chains cannot be used. If winter tires are used, only snow chains with Porsche Part Number 911 361 924 00 may be used.
f. Tire pressures for front and rear 17" Porsche wheels is to be set at 2.5 bar (36 PSI) at approximately 20~C (68~F).
Parts Information:
Approved Wheels
Wheel Position Size Offset Part Number
Front wheel 7-1/2J x 17AH 65 mm 965 362 124 05
Rear winter wheel 8J x 17AH 52 mm 965 362 126 01
Rear summer wheel 9J x 17AH 55 mm 965 362 128 00
Approved Tires Bridgestone Expedia S-01 NO
Summer Version: Michelin MXX3 NO
Pirelli P700-z 'NO
Yokohama A-008P NO
Continental Sport Contact CZ91 NO
Approved Tires Bridgestone WT05
Winter Version: Continental TS 750
Pirelli Winter 210 Performance
Semperit Direction Grip
Approved Tire Dimensions: 225/45 ZR 17 front and
Summer Version: 255/40 ZR 17 rear
Approved Tire Dimensions 205/50 R 17 89 H M&S front and
Winter Version: 225/45 R 17 90 H M&S rear
Suspension Parts/Number