Squeaking noise from tread - Reebok Exercise & Fitness

Two likely candidates: Belt or tread. Lubricating the tread would be the easiest starting point; but if you're running at 7 or more you've probably already thought of that.
If the cover isn't too difficult to remove, you can expose the drive belt and the squeaking volume change would be an indicator that the drive belt is the problem.

Something stuck in the tread or tire- rock, nail, etc

Experienced woodworkers go to great lengths when building stairs to limit the possibilities of movement that tends to cause noise.

First of all the best timber is required, nice straight grains and well seasoned so it is unlikely to move far due to shrinkage/expansion, warping or twisting.

Once good timber has been obtained, the cutting and preparation should be as accurate as possible. If this is so the minimum of fixings will be required and the stairs will be sound and silent. Difficult to maintain such quality in practice and as once built it tends to be impractical to take them down to rectify faults, the stairs will be assembled with a good quality glue, such as PVA or polyeurathane.

For added reinforcement two or three glue blocks will be added at each tread to riser joint while the stairs are still firmly clamped and the clamps will remain until the glue is fully cured. The glue blocks don't need pinning but I would use a couple in each block.

Nailed timber that moves tends to squeak more than if left to float.

You need to discover which component is moving - where the bad joint or timber is and then clamp or ***** to close the joint tightly after forcing glue into the open joint. Watching carefully above and below while someone else makes the stair creak will help.
Slack rebates can be tightened with lots of glue and a number of hardwood wedges driven into any gaps on the unloaded side. Star dowels through the string can help secure a tread moving in a string rebate.

Once the cause of the squeak is found, the joint glued as far as possible and fully closed and any slack rebates glued and wedged, adding a few glue blocks to each tread to riser and riser to tread joint will provide a permanent cure.

If you have off road tyres with big nobbles the squeaking noise is the tread moving on the road . when the nobble hits the road it tends to slide forward and as the rubber compresses it then expands as the nobble leaves the road. Something like walking on lino with rubber soled shoes that squeak as you walk

time to get a new tread mill, ether that or get a lighter mouse to run on it.

Service the brake system and check for:
Tyre tread for feather edge.
Worn disc pads.
Warped rotors.
Warped flange.

1) roller bearing 2) roller from main motor. Test both and proceed to repair it.
sincerely.
E.CUADRAMANAGUA, NICARAGUA

Sound like metal rotating in metal, could be 1) roller bearing,2) motor bearing
Proceed with this videos mechanical adjustment:

Usually when a treadmill begins to make a squeaking sound from the tread it means that the belt needs lubrication. Try Treadmill Belt Lubricant available at Canadian Tire for $10,99.

Stones in tire treads? Pull the rear wheels for a look-see. Inspect brakes and all hardware. Have then lubed. Make sure linings or pads are not glazed to eliminate squeaking noise.Make sure parking brake works properly and smoothly. It may beone or more of those things. Good luck there, pardner.