What is the basic reason for the spokes to become loose? Is it low tensile strength of the spokes and they are stretching? Is the grub defective? Makes you wonder why only 10-12 spokes per wheel. I haven't seen a clear explanation on the Forums or from BMW
Good luck with that "clear explanation" thing. Here is sort of a wise ass answer to why they come loose. The wheel is round. Dah. It isn't round when you hit bumps. Spokes have to change length somewhat when they hit bumps and the spokes and rim deform. Grub screws will loosen a bit, can't tighten (think about that). When they loosen the nipple can back out. This probably happens little by little over time. To add flame to the fire there two groups that say: you need to Loctite grub screws and another that says you don't. There is a third, very small group that says you don't need grub screws at all. See what I mean about getting a clear explanation.
It's the Ride, Not the Destination.
Last edited by OldButNotDead; 15-Nov-2018 at 05:08 PM (964).
I'm sure there's some kind of settling in period first time the spokes are tightened that could be a factor or a metallurgical change in the spoke metal formula.
Sounds good Bob, but dontcha think the elves from Bavaria should have put something in the scheduled maintenance schedule??? Maybe even the 600 mile checkup? There was a time when the majority of motorcycles had spoked wheels and none of mine had a spoke break in period. Jus sayin'
BMW has used this same basic design for spoked tubeless wheels since at least 1993; my 1993 R100GSPD had spoked tubeless wheels. I do not think it is a design flaw or that there needs to be a running in adjustment. I believe there was a failure in the quality control of the assembly process.