Well, I'm worried about them coming off at high speeds too, but so far it hasn't happened. I've travelled about 10 miles at speeds around 60 mph so far, and nothing has changed.
I do have them attached at each spoke of the wheel as far out as i can get to, so hopefully that doesn't leave enough room for them to flex a lot.
either way, it does work fine for testing, but i'm not intending for them to last more than one week. gotta get some permanent ones on there =D
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