I made up a small spreadsheet for Summer Tire availability and matching. This is for primarily for 2003-05 Spyders with stock OEM wheels and no crash bolts. I found these tires on TireRack and several other websites. No All-Season tires are included. I hope this helps some people.
OEM | Alternative | OEM | Alternative | Alternative | OEM | |||
185/55R15 | 195/50R15 | 205/50R15 | 205/45R16 | 205/50R16 | 215/45R16 | |||
Yokohama | Fleva V701 | X | O | A | O | B | ||
Kumho | ECSTA PS31 | X | O | A | O | B | ||
Toyo | Proxes R1R | O | A | O | B | |||
Dunlop | Direzza ZIII | O | A | B | ||||
Yokohama | Advan A052 | O | A | B | ||||
Hankook | Ventus R-S4 | O | O | |||||
Falken | RT 615K+ | A | X | |||||
Federal | 595 RS-R | O | A | O | B | |||
Falken | RT660 | A | X | |||||
BF Goodrich | Rival S1.5 | A | X | |||||
Bridgestone | RE-71RS | A | O | X | ||||
X = OEM size | ||||||||
O = Alternative size | ||||||||
Ideal match | X + X | |||||||
Alternative Match | O + O | |||||||
Your On Your Own | All Others | |||||||