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Cartridge bearings in Magura Louise Pro Hub

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Cartridge bearings in Magura Louise Pro Hub

Old 06-13-05, 04:19 PM
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Richbiker
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Cartridge bearings in Magura Louise Pro Hub

I have 2 sets of these disc hubs; one on a mountain bike & one on my cx / commuter bike. They use cartridge bearings. I've had them apart before, and there seem to be super skinny spacers inside one side of the hub--sometimes next to the face of the "inner race" and sometimes next to the outer race, but always on the in board side of the bearing. The numbers and inner vs out race placement of these little spacers is never the same.

So I'm having trouble with a front hub. It sometimes develops a little bit of side to side play. No amount of tightening the locknuts eliminates this problem. Sometimes tightening the quick release solves it for a while (until I remove the wheel again, or it gets ridden another 500 miles). Sometimes getting the locknuts finger tight then getting the quick release tight (do I ever ride with it loose? no) solves the problem for a while. When I disassemble the hub and pop out the bearings, I notice they have a little side-to-side play in them. Is this normal? since it's not a cup & cone design, I have no idea how to get this hub and its bearings dialed in and locked up to eliminate the slight rattling and play.

Any advice from someone familiar with these hubs or with cartridge bearing hubs in general? Any "rules" that I don't know about, or instructions that I need to access (sorry, I've already tried the instructions and contacted SRAM, who said these bearing should last for many many many thousands of miles).

Thanks,
Rich
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Old 06-13-05, 08:50 PM
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mtbikerinpa
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That is the first I have heard of a hub using spacers in that application, but to answer the question:
Cartridges will have an ever so slight ammount of play when they are out of the machine. This is in part due to accounting for the compression of pressing them into the shell. The idea with the spacers is to prevent the tensioning nuts(end of axles) from Over-tighening and prematurely wearing on the bearings. To remove the play, you will need to remove one or more shims and trial fit it. The difference is very slight between too tight and just right, so expect to have a tedious job. It should have no play when installed on the bike and the skewer is at full tight. If it is satisfactory on the bike, all things are locked down, and it has play off-bike, don't worry about it.
You should be able to acheive at least 3-4k miles on the stock cartridges(though with adjustment potential you may get more). Much more on upgrade ones.
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