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edscoble
Are these standard size bearing size and how easy to swap out without specialist tools?
I've been recommending SP-8x (for efficiency) without much feedback on the bearing life. Previously I recommended (and personally run) Shimano dynamos as I have had experience with these cup/cone bearings lasting for a lengthy amount of time under arduous riding conditions, while sealed bearing hubs I've found never lasted more than a couple 1000k's.