Iíve seen some videos and guides about how to get into the bottom bracket and grease up the bearings, but I donít know which one of those really applies to my bike and, specifically, which tools Iíd have to get to take everything apart and put it back together without messing anything up. The crankset is Shimano Deore DX on a 1991 Trek 970. Also, is it really better to just replace the bearings while you are in there? Do they come in different sizes?
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Thread: Older Bike Grease Up