PNW_CT
Member
- First Name
- Brian
- Joined
- Apr 1, 2026
- Threads
- 2
- Messages
- 17
- Reaction score
- 6
- Location
- Kirkland, WA
- Vehicles
- 2022 Porsche Boxster GTS 4.0, 2025 CT 4
- Thread starter
- #1
Hi,
I have a 2025 CT 4 with the 21" option (Front: 265/35 R21, Rear:305/30 R21). If I go to the 20" option sizing (Front: 245/45 R20, Rear 285/40 R20) for a winter set, will I have any issues? The tire size calc says 1.34% and 2.74% diameter, front and rear, respectively.
If the wheel offsets are a little different since the 20" wheels aren't Porsche, does that matter? OEM is 54 & 60 (front/rear) and these wheels are 50 & 55mm.
Thanks
I have a 2025 CT 4 with the 21" option (Front: 265/35 R21, Rear:305/30 R21). If I go to the 20" option sizing (Front: 245/45 R20, Rear 285/40 R20) for a winter set, will I have any issues? The tire size calc says 1.34% and 2.74% diameter, front and rear, respectively.
If the wheel offsets are a little different since the 20" wheels aren't Porsche, does that matter? OEM is 54 & 60 (front/rear) and these wheels are 50 & 55mm.
Thanks
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