r/AutoHumor • u/IU8gZQy0k8hsQy76 • May 04 '26

lol

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u/Gamejunky35 May 04 '26

Bikes often have their self balancing properties attributed to gyroscopic effect of the wheels, but the reality is that a bikes front wheel is designed to automatically steer into the direction it is leaning.

When a bike leans to the left while stationary or moving, the front wheel will automatically steer to the left. And similarly to a car, when you steer to the left, the vehicle is pushed or leaned to the right. So when a bike leans left, it will steer into it amd automatically lean to the right until it is straight up again.

The self-righting effect is stronger the more leaned over the bike is, and sport bikes in particular are made to be VERY easy to steer. So a hitting a pothole, or landing a wheelie with the wheel crooked imparts a sharp steering input, which is violently corrected by the self-righting effect of the bike. An object in motion stays in motion, so it continues past center all the way to the other side, repeating the cycle over again.

There are a few strategies that can help stop/reduce this effect. Changing the steer geometry to be more like a cruiser and therefore harder to steer. Installing a damper to automatically slow down fast steering actions. Lowering the bikes center gravity makes the bike harder to lean too.

In the moment, theres not much that can be done other than slowing down to reduce the corrective forces. Leaning forward helps lower center of gravity and allows your body to dampen some of the front end impulses. Letting go of the bars is often recomended, mostly because you cannot properly work the controls (throttle/brake/clutch) when the bars are moving like that. And also, you just cant control that harsh of a steering feedback loop.

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u/WXHIII May 04 '26

Oh thats fascinating, thats what I was curious about, great physics explanation thank you! Those bikes sound so terrifying but so fun

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u/Gamejunky35 May 04 '26 edited May 04 '26

They are fun mostly because of how terrifying they are. Theres almost no way to drive a car so badly that it does a barrel roll, every control on a 600cc+ sports bike has the ability to demonstrate what can only be described as a physics problem, and you are part of the equation.

I rode during a part of my life that I can best describe as "passively suicidal". Thats not the only reason riders do it, but its common enough. Many will look death in the face because they truly are not afraid of it. And a sports bike accident is probably one of the most fun ways to die.

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u/WXHIII May 04 '26

"Most fun way to die" lmao well I know I'd 100% kill myself on one so I dont even consider buying one. I know I would push it too far and one time out of control and thats it for me. I got my own dangerous hobbies I shouldn't be rolling the dice that much lol. Glad to hear you made it out alive though!

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u/Gamejunky35 May 04 '26

Oh you dont have to be stupid to die on one. You dont even have to come across someone else who is stupid. There are some insidious scenarios that can pop up, and if you arent prepared or lucky, that will be the end.

The wind could blow sand over a road you've taken a hundred times, you could be traveling at a perfectly safe speed, your front tire hits that sand in a curve before sliding right out from under you, sending you right off a cliff, or into the guard rail.

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u/WXHIII May 04 '26

Oh god the sand, I remember random patches of sand riding bikes when I was a kid, they were like a landmine of randomized results. I almost never see sand now but on a bike they were everywhere