Tire Size
Equivalent
Diameter
More Wheel Sizes
14"
15"
16"
17"
18"
19"
20"
21"
22"
23"
24"
26"
Select a Size to Compare Prices on Available Tires
Porsche equips the 2008 Boxster S with more than one stock tire size. Select each size option to see available tires.
Filter Tire Results [+]
Potenza RE980AS PlusAll Season | Ultra High Performance
235/40R18 Avg. $174.00
265/40R18 Avg. $258.67
Proxes Sport A/SAll Season | Ultra High Performance
235/40R18 Avg. $176.00
265/40R18 Avg. $233.00
Azenis FK460 A/SAll Season | Ultra High Performance
235/40R18 Avg. $179.00
265/40R18 Avg. $241.00
ADVAN Sport A/S PlusAll Season | Ultra High Performance
235/40R18 Avg. $184.00
265/40R18 Avg. $203.25
ExtremeContact DWS 06 PlusAll Season | Ultra High Performance
235/40R18 Avg. $187.00
265/40R18 Avg. $227.00
ExtremeContact Sport 02Summer | Supreme Performance
235/40R18 Avg. $208.00
265/40R18 Avg. $272.00
Pilot Sport All Season 4All Season | Ultra High Performance
235/40R18 Avg. $213.75
265/40R18 Avg. $279.00