Are ball bearings standardized?

[BoyFallDown]

My front wheel bearings are starting to make a knocking noise, Im pretty sure theyre about to fall off.

Can I just buy any new bearings, like the kind they use on skateboards and inline skates? Which kind should I buy?

[Crappler]

You referring to the caster fork bearing, or wheel?

[baldfatdad]

If you post what chair, front wheels you have, someone on here will be able to tell you what size bearings to buy and where to get them.

[Crappler]

But I'm guessing it's just loose if it's making a knocking noise.

And I guess to answer your question, yes you can buy new bearing. Sportaid, Spinlife... They're both good

[NW-Will]

What they ^ said, and this thread should be interesting to you.

http://sci.rutgers.edu/forum/showthread.php?t=135582

[BoyFallDown]

I'm referring to the wheel bearings. It's a KI Mobility Catalyst 5 chair. I have no idea what brand the front wheels are, whatever comes standard with the chair.

Should I get a certain type of bearing? I was reading up on the ABEC standard, but I don't know what is best for front wheels on a wheelchair?

[chasmengr]

Here's another thread about bearings.

[BoyFallDown]

Thanks for the links, I'm learning a lot!