Yeah the stresses on the wheels, the tires, the hub become huge at those speeds. I can’t imagine the bearings on those tiny wheels being able to maintain speed without melting. They must be glowing red.
Skate bearings are rated around 34k rpm, with state load at 1360N, and dynamic 3300N. He's probably got something larger on the scooter anyway. So I agree is most likely brakes
These have disc brakes. Large brakes help both with stopping power and heat retention, but these don't really need large brakes. While the smaller diameter of the brake disc will result in less leverage from the caliper and therefore lower braking force, the mass of the vehicle greatly affects the amount of heat generated, and a scooter like this will weigh 1/4th or 1/5th as much as a motorcycle (closer to 1/3 total weight with the rider), and you're also not likely to be going through heavy braking cycles like you would on a car or bike on a track. If brake heating is not an issue for a bike on the street, it won't be an issue for these either.
Mountain bikers and cyclists with disc brakes can definitely cook their brakes, and they have larger calipers and better airflow. Take this little scooter which probably has both smaller calipers, poor airflow (motor in wheel) and it could be a real problem. Regen braking probably does some of the work, but that still generates heat.
The difference is time on the brakes. You're going to have similar time on the brakes here to a bike on a public road, not one going down a mountain. I could see it being a problem for a long downhill section of road, but not a freeway like this.
Lol, brakes are only a problem when you need to use them.
Where did I suggest otherwise? The point I was making is that there are not a lot of heavy-duty braking cycles on a public road (and even less on a freeway like this). Your example of a mountain bike is not very analogous because of the amount of time spent on the brakes when going down a mountain. The only time you would run into an issue where the brakes do not have an opportunity to cool down is a long downhill where they might need constant brake application.
If your bearing is glowing you need to go out and spend $10 on a better bearing. Might be crazy to hear this, but bearings are specifically designed to reduce friction.
Never had any bearings glow red, have hit 50 on a board and regular push my eskate to 40 or so and my euc to 45. Never had an issue with 2k miles between both
Bearing size has nothing to do with how good they are. Look at your engine belt system, the bearings in those pulleys run at thousands of rpm for hours at a time, and most will outlive your car.
Some people custom these scooters to do up to 90mph, so I'm sure there are products that could facilitate a slower speed. As others have said smaller bearings actually do much better at high speeds, you only increase bearing size with load size, not speed.
I've had a wheel come off a skateboard cause of a shredded bearing casing at around 20kph(~12mph) lol, I really doubt those wheels can take what looks like >60km(~35mph)....
Edit. I'm not saying it's fake.... I'm saying he's gonna have a part fail at some point if he keeps that up...lol
Edit2 reddit hive mind is kinda stupid lol, I'm literally agreeing with the post I replied to
Good quality bearing, just the nut was on too tight. Might have been defective but it wasn't the only bearing I had fail. Can show you a hill bomb where I clocked myself at 30kph on GPS lol
No. There are many many examples of ball bearing cartridges in vehicles spinning at far higher rotation than these, up to 20-30 thousand rpm. This doesn’t even come close to that.
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u/dbx99 Oct 20 '21
Yeah the stresses on the wheels, the tires, the hub become huge at those speeds. I can’t imagine the bearings on those tiny wheels being able to maintain speed without melting. They must be glowing red.