I don't think all the bearings brands are the same. I took apart the seals of the ENDURO ones and the SKF that I bought and you can tell the difference. I know they don't rotate just move some degrees but.... My advice/experience with both frames and with both brand of bearings:
-(Tracer) : Enduro main pivot bearings completely rust (not only the cage but the balls inside too) after 4 months of use ;
-bought new SKF bearings, took apart both seals on each bearing, filled with lots of high quality bearing grease, put the seals on.

SKF bearing reference :

Tracer : 608-2RSH (22mm(ED)x8mm(ID)x7mm(thick))
Spider : 61901-2RS1 (24mm(ED)x12mm(ID)x6mm(thick))

I use SKF because they are the standard reference in high quality bearings.

Hope this helps.

paulo from portugal

I don't think all the bearings brands are the same.

Tracer : 608-2RSH (22mm(ED)x8mm(ID)x7mm(thick))
Spider : 61901-2RS1 (24mm(ED)x12mm(ID)x6mm(thick))

I use SKF because they are the standard reference in high quality bearings.

Hope this helps.


The number on the bearing references a specific universal size. 608 bearings are pretty common. If anyone is looking for quality bearings, your best bet is to look up bearings in your Yello Pages and call a local bearing manufacturer. They generally will stock bearings in different qualities, also. If they don't have them, they can make them. Might be a little pricier to go local, but well worth it.