991TR

For anyone interested, we took the set of five-lug 991.2 GTS wheels that came with the car and mounted them onto my 991 NB (the car is lowered with TechArt springs). They fit.

The front width is identical, offset is slightly more aggressive. Rear width on the 991.2 GTS wheels is .5 wider, with a different offset and tire. See below for specs.

Haven't done any hard driving, but rear fitment hasn't caused any issues thus far.

Factory 991 NB fitment
Front - 8.5 x 20 ET51 - 245/35 ZR 20
Rear - 11 x 20 ET70 - 295/30 ZR 20

Factory 991. WB/GTS fitment
Front - 8.5 x 20 ET 49 - 245/35 ZR 20
Rear - 11.5 x 20 ET 56 - 305/30 ZR 20

3DMetal

This is great fitment information that will help other builds.

yosshaa

love the picture proof, thanks for sharing this.