Where to put the temp probe (beer can chicken)

[Fore Check]

I really wouldn't cook at a lower temp. Could of been a bum chicken But normally like kelly said, if it's chewy it's under done plus if it's dry it's overdone.

I had both symptoms....

EDIT: I don't think it's a temp probe problem - I used it the day before on an 8 lb pork shoulder that turned out perfect.

[Dionysus]

How does 2 hours (or a bit under) cook time sound for a beer can chicken at 275? Chicken is about 4.5 lbs.

For a 4.5 lb I would usually do mine for 3+ hours @ 250º until I reach 165º-170º in the thigh. This is what mine usually look like. Skin is not usually too rubbery ....