It happened Wednesday just before 5 p.m. on State Highway 6, near County Road 1470.
OHP says 46 year old Michael David Reuter was driving south on Highway 6 when he ran into the back of a tractor that was pulling a hay baler, which launched him 105 feet from his bike.
Troopers say Reuter sustained head and torso injuries and was pronounced dead at an Altus hospital.
They say the tractor driver was not hurt.
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