bandsaw running rough after tire change

[Jim Barstow]

I just put new tires on my grizzly 514x2 bandsaw and it is now running rough. By rough, I mean that there is more vibration and blade movement. With the original tires, it easily passed the "nickel on its edge test" and the blade was absolutely stable. Not anymore. I got the tires from grizzly and put them on the way it was advised: heat to 150F then run a dowel around between the wheel and the tire to even out the tension.

Any advice on how to smooth it out?

[Joe Scharle]

Is there a 'bump' on the tire?

[Jim Barstow]

Not an obvious one

[Joe Scharle]

I'd remove the blade.
Start the saw to see if the vibration is in the drive wheel.
Then I'd spin the upper wheel and mark the 6 o'clock position. Spin it 3-4 more times to see if it stops in the same 4-8 o'clock area. If so, I'd wrap some wire at 180 degs.
While the wheels are spinning, I'd lay a thin stick along the tires and check for 'thumping'. I've read of defective tires.
Lastly, I'd put on another blade.

[Jim Barstow]

Found the problem. Although the tire didn't have a bump, there was one section where it was skewed laterally. That caused movement of the blade and the resulting vibration. I fixed it and it now passes the nickel test again.