Hi. All of a sudden wrinkled down the middle. This is the first treadmill we've owned. Is this one of the ways to tell the belt needs to be replaced? I figured it'd be more of tread wear, but obviously don't know. Thx

Ok so I recently obtained a Sportcraft TX300 treadmill (Model No. 04003). I think it was manufactured in 2007. Anyway, it runs fine with the exception of a loud thumping noise. I am pretty sure the sound is coming from the front panel. When I listen closely it doesn't seem to be from the motor, but rather from the right roller/bearing. I have lubricated the belt and adjusted the belt tension as well. I thought about lubricating the bearing, but I first want to be sure that's causing the noise. Wish I could attach the video so you can hear what I hear. It sounds like a loud thumping or door banging....It's pretty consistent and doesn't seem to matter the speed.