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grease or not on splined b.b.(7 posts)

grease or not on splined b.b.slow-ron
Jun 12, 2002 5:59 AM
Until now all of the crank/b.b. arrangements that I had on my bikes have been with the traditional tapered b.b. On the new Shimano stuff do you grease the b.b. splines since there's no interference fit?

Yes, if new, they come greased. I use white lithium (nm)Paul
Jun 12, 2002 6:02 AM
Lithium bad.grzy
Jun 13, 2002 7:41 AM
White lithium grease doesn't do well in a wet environment - it quickly dries out and turns into a cakey substance and no longer lubricates. If you're going to the trouble to apply grease you're much better off using a quality bike grease like Phil Wood, Finish Line, Pedros, etc.

Shimano's official position is that splined BB's are to be greased while square taper BB's are not.
Interesting. Says it's good for bearings, and just aboutPaul
Jun 13, 2002 7:53 AM
anything. have never noticed it to be dryed up when disassembling components that I've greased. But I'll look into other types to see if they say anything about water.

Lithium is OKKerry
Jun 13, 2002 5:31 PM
Sure, it does dry out, but it takes a few years. Nothing on a bike should be left that long without cleaning/regreasing. Assuming you maintain the bike, there's nothing wrong with lithium grease. Other greases are better (my current favorite is Slick50 Grease 1) but not so much that you can't use lithium.
Lithium is OKgrzy
Jun 14, 2002 11:29 AM
How quickly litium dries out depends upon the service conditions. Why should you be forced into a rebuild cycle due to picking an inferior product when you could have picked a superior one and be left with options? Gee, there's nothing worn with this assembly other than the fact that I used crappy grease so I'm just going to stay home and rebuild everything. Many things on a bike can be left alone for a long time if things are done correctly. I've got a Phil Wood BB that's been installed on an older bike for over 20 years without ever having been serviced - where would I be if Phil used lithium? Ever wonder why there isn't a single manufacturer or decent LBS that uses lithiium grease? Hey, you can use mayonaise for lubrication, but it doesn't mean it's a good idea. Plain and simple litiium is a poor choice for use on a bicycle, but there's no law against it. Hell, people do all sorts of half-assed things, but it doesn't mean you should encourage them. Kool Aid in your car battery instead of distilled water - hey sure, why not?
Sheesh, lighten up! (nm)Kerry
Jun 14, 2002 4:51 PM