Octomus

Hey so I've been reading a lot about what I should be looking for when buying an 8 and today I was looking at one and when I was looking under the car I notice that the back right tire had significantly less tread than the other tires, is this just an older tire or could this be a problem with the car? sorry if this has been answered somewhere else thanks for reading this and helping me out!

Loki

iTrader: (1)

That's not really something the internet can answer, the seller will have to tell you that.

+ 100 points for paying attention to tread wear though.

RX8Soldier

iTrader: (24)

It's not recommended to drive a vehicle for too long with uneven tread. If you need to purchase new tires, buy 2 and keep the other (the GOOD tire currently on the car) as a spare.
Also, where is the wear? It could implicate an issue with the suspension.