Pontiac G8 Tires — Fitment by Year

I see a fair number of 2008 and 2009 G8s roll through here, and the OE fitment is straightforward — you're looking at either 245/45-18 or 245/40-19 depending on your trim and wheel setup. Both sizes sit on a 5x120 bolt pattern with a 66.90mm hub bore, so once I know which year and which wheel you're running, I can tell you exactly what's going to work.

For OE replacement, I stock the sizes that came on these cars, and I also carry some solid upgrade options if you want a bit more sidewall or a different compound for how you drive. The G8 was built for road feel, so people who own them tend to care about that. Load rating matters here — you're not light, and I make sure whatever I mount handles that. I keep these sizes on the rack because the G8 community around Marietta stays active.

When my crew installs a set, I run road-force balance on every one — no guessing. We check your TPMS sensors, verify hub-bore fitment, torque everything to spec in the right sequence, and you drive out knowing it's done right. We're bilingual, walk-ins are welcome, and we've been in Marietta fifteen years doing this the same way — in-house, no outsourcing. You see the same faces.

We mount these for folks across Marietta, East Cobb, and up into Roswell and Kennesaw. If you need to spread the cost, Synchrony runs a 6-month promo on orders over $199, and Acima lease-to-own starts at $10 down. Walk in at 1585 Roswell Rd, call me at 678-400-6467, or book online below.