Porsche Cayman Owner's Manual page 304

Weights
Cayman
Empty weight (depending on equipment)
Maximum gross weight
1)
Maximum axle load, front
1)
Maximum axle load, rear
Maximum useful load, Roof Transport System
Cayman S
Empty weight (depending on equipment)
Maximum gross weight
1)
Maximum axle load, front
1)
Maximum axle load, rear
Maximum useful load, Roof Transport System
If additional accessories are installed, the useful load will be correspondingly less.
1)
The maximum gross weight must not be exceeded.
2)
Use only Original Porsche Roof Transport System
302
Vehicle Identification, Technical Data
Manual transmission
2866 lbs. to 3131 lbs.
1300 kg to 1420 kg
3571 lbs./1620 kg
1709 lbs./775 kg
2017 lbs./915 kg
2)
132 lbs./60 kg
Manual transmission
2976 lbs. to 3153 lbs.
1350 kg to 1430 kg
3594 lbs./1630 kg
1709 lbs./775 kg
2072 lbs./940 kg
2)
132 lbs./60 kg
Tiptronic S
2998 lbs. to 3230 lbs.
1360 kg to 1465 kg
3671 lbs./1665 kg
1709 lbs./775 kg
2017 lbs./915 kg
132 lbs./60 kg
Tiptronic S
3064 lbs. to 3241 lbs.
1390 kg to 1470 kg
3682 lbs./1670 kg
1709 lbs./775 kg
2072 lbs./940 kg
132 lbs./60 kg