I am replacing the rear tires on my GF's self-propelled Honda. The model # is HRB215 HF it is a mulching mower, and not hydrostatic. I am not getting many hits when I do an internet search for these wheels. I also thought I remembered reading somewhere about just being able to replace the treads on these wheels and reusing the wheel and gears. This is an older model mower that gets used about 20 hours per year and runs very strong but it seems to eat wheels. Thanks