General Question

Ltryptophan's avatar

For NASCAR why not have wheels that use a lever for fastening to the hub?

Asked by Ltryptophan (10710points) 1 month ago from iPhone

During a race a racecar sails into the pit, the pit crew jumps down and uses compressed air to unbolt the lug nuts as rapidly as they can.

On racing road bikes there are levers that allow bicycle wheels to be quickly removed from the frame.

Why not create a similar lever system for cars. It might need to be beefier, but shouldn’t the same mechanical principles hold?

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10 Answers

stanleybmanly's avatar

I’m not sure but I believe there are “stock” requirements built into the specifications for the cars to qualify. In other words, if you can’t walk into a showroom and buy a car with the “levered” hubs, the innovation can’t show up on the track.

Tropical_Willie's avatar

Don’t think I’d want to have someone on the track bump into the lever at say 200 mph.

Ltryptophan's avatar

Yeah, well you beef them up a bit. There can’t be much more than the lugs that are stock on a NASCAR… right? And even those I doubt seriously are stock.

stanleybmanly's avatar

“Knock off hubs” were common on sports cars of the 50s and 60s.

Ltryptophan's avatar

At 200mph impact forces will rip wheels off no matter what. It’s not like gremlin fingers will show up to flip a little road bike lever on a racecar. Probably it would need to be a lever that’s hammered closed, and levered open.

Tropical_Willie's avatar

NASCAR 5 second tire change It take 16 seconds or more to empty two cans of fuel.

SEKA's avatar

I had a tire come off my car at 35 mph, I wouldn’t want a similar experience at 200 mph

Mike702's avatar

Could, it would be much faster to install. As long as the wheel doesn’t fly off as it continues the race.

kritiper's avatar

Not enough retentive force to overcome either spinning or lateral centrifugal force.

kritiper's avatar

Here is a point I don’t think many people realize: When a tire is spinning, the top of the tire is going twice the speed of the vehicle and the tread comes to a complete stop when it contacts the pavement. The lug nuts aren’t subjected to the same forces, but they do slow down and speed up a great deal in relation to a motionless object not related to the vehicle.

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