986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - 2013 981S

llan981S · 12-31-2013, 08:20 AM

The 2013 981 specifies the following wheel combinations:
235/265 35 20
235/265 40 19
235/265 45 18

I just bought a set of 2009 Boxster S III 18x8 18x9 wheels and wanted to use 18" for Driver Education to save on the cost of 20" tires.

At issue are the following:
1) Seems the there are only 3 tires available in the 235/265 45 18 size
2) Two 2 national tire companies that if I deviate ABS and PASM will not work
3) Going to 18" will not ventilate the brakes adequately. Larger calipers on 981S

Question:
1) Can I move to a more tire friendly size, recommendations?
2) Will the ABS and PASM work?
3) Suggestions on tires that are DOT legal so I can change tire at home, then go to DE
4) Any truth to ventilation issue with smaller rims and calipers?

12-31-2013, 08:20 AM	#1
llan981S llan981S Join Date: Dec 2013 Location: New Jersey Posts: 2	2013 981S - 18" wheel for DE The 2013 981 specifies the following wheel combinations: 235/265 35 20 235/265 40 19 235/265 45 18 I just bought a set of 2009 Boxster S III 18x8 18x9 wheels and wanted to use 18" for Driver Education to save on the cost of 20" tires. At issue are the following: 1) Seems the there are only 3 tires available in the 235/265 45 18 size 2) Two 2 national tire companies that if I deviate ABS and PASM will not work 3) Going to 18" will not ventilate the brakes adequately. Larger calipers on 981S Question: 1) Can I move to a more tire friendly size, recommendations? 2) Will the ABS and PASM work? 3) Suggestions on tires that are DOT legal so I can change tire at home, then go to DE 4) Any truth to ventilation issue with smaller rims and calipers?