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E90/E91/E92/E93 (2006 - 2013)
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  #1  
Old 10-14-2013, 05:31 PM
baller330 baller330 is offline
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Interesting question

I'm a skateboarder and when you have the best bearings in your wheels you roll for a longer period of time. I wonder if this comes to play in a car. If there is some way to increase distance rolled without much fuel consumption.


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  #2  
Old 10-14-2013, 06:07 PM
bigdaws bigdaws is offline
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It's applicable, but not to the extent you might think. The reason it makes such a big difference on a skateboard is that, in general, skateboards come with VERY CHEAP bearings to keep the cost down. In a $100 skateboard, spending an extra $20 on bearings is a massive difference in cost.

In a car, especially when fuel economy and ride quality are so important, nobody cheaps out on those components.... and even then, "the best" aren't that expensive.

There are other reasons good bearings are particularly important in a car -- the reason good one make a difference is that they convert less kinetic energy into heat. On a skateboard, there isn't much kinetic energy to convert. In a car, a bearing with a lot of friction is going to get incredibly hot very fast, and be completely unreliable.
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Old 10-14-2013, 07:17 PM
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CALWATERBOY CALWATERBOY is offline
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Quote:
Originally Posted by Kaboobtops View Post
I'm a skateboarder and when you have the best bearings in your wheels you roll for a longer period of time. I wonder if this comes to play in a car. If there is some way to increase distance rolled without much fuel consumption.

You're unlikely to improve on stock bearings.
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Old 10-14-2013, 07:27 PM
twhisten twhisten is offline
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If I put a BMW roundel on my skateboard, do my bearings automatically get better? Or it will just be more expensive to replace?
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  #5  
Old 10-14-2013, 07:39 PM
baller330 baller330 is offline
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Interesting question

I don't even know a car had bearings. I just feel like my car could keep a better constant speed than it does.


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Old 10-14-2013, 07:40 PM
baller330 baller330 is offline
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Interesting question

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Originally Posted by twhisten View Post
If I put a BMW roundel on my skateboard, do my bearings automatically get better? Or it will just be more expensive to replace?
Lmao


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Old 10-14-2013, 07:44 PM
baller330 baller330 is offline
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Interesting question

Quote:
Originally Posted by bigdaws View Post
It's applicable, but not to the extent you might think. The reason it makes such a big difference on a skateboard is that, in general, skateboards come with VERY CHEAP bearings to keep the cost down. In a $100 skateboard, spending an extra $20 on bearings is a massive difference in cost.

In a car, especially when fuel economy and ride quality are so important, nobody cheaps out on those components.... and even then, "the best" aren't that expensive.

There are other reasons good bearings are particularly important in a car -- the reason good one make a difference is that they convert less kinetic energy into heat. On a skateboard, there isn't much kinetic energy to convert. In a car, a bearing with a lot of friction is going to get incredibly hot very fast, and be completely unreliable.
Thanks for your feedback


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Old 10-15-2013, 08:08 AM
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bocabimmer bocabimmer is offline
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Interesting question

Quote:
Originally Posted by Kaboobtops View Post
I don't even know a car had bearings. I just feel like my car could keep a better constant speed than it does.


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There's a lot more factors at play with a car than a skateboard that slows it down.

Generally speaking, if an automaker (especially in today's business climate where automakers are beta testing everything on consumers) hasn't put it on their car already there's probably a cost/QC reason for it.


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Old 10-15-2013, 08:11 AM
Watchme Watchme is offline
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lol two VERY different situations, weight, size, momentum - know your physics quantities
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Old 10-15-2013, 08:38 AM
fdriller9 fdriller9 is offline
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I think it has more to do with momentum/weight of each subject.

You have tons of weight to keep a car moving but you only have body weight to keep the skate board moving.

So it's going to be noticeable when you put better bearings on a skateboard. Same if you use lubricant on the bearings, you'll fly.

Keeping your tires properly inflated is kind of like the equivalent to better bearings on a skateboard.
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Old 10-15-2013, 01:26 PM
mossman35 mossman35 is offline
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Actually, compared to my previous car, this one rolls forever!! I have gotten into the habit of pulling into the lot at work and leaving it in neutral. I just roll right into my spot.. quite a distance slight downhill.

I couldn't cost this far in the same lot with my previous manual transmission cars.
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