Honey, Agatha Christie may have been a literary genius, but she didn't coin that phrase. "The wheels of the grist mill grind slowly but grind exceedingly fine" is actually an old proverb that dates back way before Christie was even a twinkle in her parents' eyes. So, nope, that quote ain't hers.
It is a traditional proverb. Correctly quoted reads 'the wheels of justice turn slowly, but grind exceedingly fine'. It may take a long time to reach the correct solution, but when it is reached it is right to the finest detail
One of your wheel bearings are bad
Slow down but proceed forward and slowly steer back on to the pavement.
Chances are you have a rock(S) stuck in your rear tire tread. pry it out.
Let off the accelerator and very slowly return to the roadway. Do not panic and do not jerk the steering wheel.
This is easier on the transmission, especially when pulling a heavy load.
When the wheels are spinning at speed they start acting as gyroscopes, steadying the bike.
Take you foot off the gas pedal, brake slightly, and slowly return to the pavement. If you do not panic and jerk the steering wheel, you will be fine.
If you apply the breaks quickly on a slick road, the wheels' rotational movement will come to a complete stop, but the car itself will keep moving forward, causing the car to slip. It happens because the force of friction, Ff, is small. The traction of the wheels on the ground (which requires that the wheels continue to roll at the speed that the ground moves past them, which is what normally happens) is what allows the driver to maintain control of the car. If the wheels suddenly were not gripping the ground, which would happen if their rotational motion stopped, the driver would have not control over the car. Slowly applying the breaks is advised because the force of friction is not exceded by the force of the breaks. In otherwords, friction (traction) still causes the wheels to roll, mainting the driver's control over the car. If the force of the breaks exceeds that of friction, then the wheels will come to a stop before the car does.
Take your foot off the accelerator, and slowly move back on the road. Do not jerk the wheel or apply the brakes.
At slow speeds the gyroscopic action of the wheels isn't much help, so it's all up to the balancing skill of the rider. Practise, practise practise!
overheating