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Generic wheel bearing specs

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I found some cheap wheel bearings that I noticed said c3 specification which I understand is a larger internal clearance than normal? I should be looking for C0 spec bearings correct? What internal clearance specification is "normal" for a dirt bike wheel bearing? I assume SKF bearings are C0?

If the generic ones meet the C0 spec they should be just as good or nah? I can get 10 of them bad boys for the same price as SKF, has anyone had bad experience with the generics? Probably the same as all balls I'm thinking...

Thanks!

Edited by Smokey-McCringleberry

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Not sure about the clearance question but I just needed wheel bearings and I didn't want those cheap aftermarket brands that include crappy bearings so I searched for the bearing by size and found these PEER brand. They used to be made in the U.S. but were bought by SKF and are now made in China and another place but they are still real good quality. Actually the only bearing made in China that is good quality IMO and they are priced well. I sold the bike so not sure how they held up but I did research on them and people that have tried them said they are good so you can check it out. Just measure the ID, OD, and width in mm then put that in ebay search and you'll find all bearings from high end expensive to cheap. Also you can find the oils seals the same way.

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I recently bought some SKF fork seals for my 250R and IMO they are WAY better than the OEM, Pivot Works and All Balls I compared them to but the Pivot Works were close. With that said I also recently bought Pivot Works full fork rebuild kit which was good except a seal failed) and their swing arm/linkage kits and IMO was convenient buying bearing full kits.

I'll see how they held up when I do my next re-lube BUT I'm now taking a good look at SKF options first when I need bearing etc in the future

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While there may now be some good aftermarket fork seals, in my 40+ years of riding I've never found any better than Honda OEM.

C3 is the standard clearance for bearings. Wheel bearings are over designed for the application and do not fail from overload or speed, they fail from contamination.  However OEM bearings seals are not adequate for protection so I only use both sides sealed bearings.   Bearing Supply stores can advise you on a bearing's quality and expected life, but because the common failure mode for wheel bearing is contamination I buy cheap sealed bearings. 

Some Deep Groove Metric Ball Bearings:
# . . . .  IDxODxTH
6000 ... 10x26x8
16100.. 10x28x8
6200.. . 10x30x9
6300. .. 10x35x11
16001.. 12x28x7
6201 ... 12x32x10
16101.. 12x32x8
16101.. 12x32x8
6301... 12x37x12
6301... 12x37x12
6802... 15x24x5
6902... 15x28x7
16002.. 15x32x8
16002... 15x32x8
6002... 15x32x9
6202... 15x35x11
6302... 15x42x13
6302... 15x42x13
6003... 17x35x10
16003.. 17x35x8
16003.. 17x35x8
6203... 17x40x12
6203... 17x40x12
6303... 17x47x14
6303... 17x47x14
6904... 20x37x9
6904 ... 20x37x9
6004... 20x42x12
6204... 20x47x14
6204... 20x47x14
6304... 20x52x15
6905... 25x42x9
6005... 25x47x12
16005.. 25x47x8
6205... 25x52x15
6305... 25x62x17
6006... 30x55x13
16006.. 30x55x9
6206... 30x62x16
6306.... 30x72x19
6207... 35x72x17

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On 11/19/2017 at 8:32 AM, Smokey-McCringleberry said:

I found some cheap wheel bearings that I noticed said c3 specification which I understand is a larger internal clearance than normal? I should be looking for C0 spec bearings correct? What internal clearance specification is "normal" for a dirt bike wheel bearing? I assume SKF bearings are C0?

If the generic ones meet the C0 spec they should be just as good or nah? I can get 10 of them bad boys for the same price as SKF, has anyone had bad experience with the generics? Probably the same as all balls I'm thinking...

Thanks!

C3 is completely fine for a wheel bearing

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6 hours ago, Smokey-McCringleberry said:

So you can't feel any slop at the wheel with a new c3 bearing?

should not be able to with your hand, and they can handle axial loads slightly better than a standard bearing 

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I will give them a shot. I think the Chinese bearings paired with the SKF seals might last just as long. 

I used to think that cheap bearings meant frequent changes but its quite possible the cheap seals that come in the kit are to blame. I have used grease as well as left them alone and noticed no difference in bearing life, packing seals is a waste of time IMO. 

Edited by Smokey-McCringleberry

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