Brucey wrote:If you are going to mount a dynamo on the fork, I'd suggest to use a front mounted one on a secure bracket of some kind (braze-on or maybe one of those that mounts to a canti boss, if you have strong cantibosses). Mount it using nyloc nuts and washers that will make for a secure mounting.
I'd agree with that much. Mounting to a clamp wrapped around either front fork or rear stay does not sound secure. Use a braze-on or boss mount if you can (I've always used boss mounts). Even so, I feel there's much more chance of the wheel rotation kicking a loose dynamo out of the wheel than jamming on it - it seems improbable that a mount would be loose enough to slide around, yet strong enough for the dynamo spring to push against it hard enough to jam the wheel.
I'd also comment that I've run an Axa HR on Schwalbe dynamo-stripped tyres in rain without slipping, or much in the way of tyre or roller wear. The B+M Dymotec 6 did slip a bit in the rain when its roller got worn and I think roller wear was mainly due to it drifting slightly misaligned on the dynoshoe (which was fiddlier to set up than the Axa mount).
MJR, mostly pedalling 3-speed roadsters. KL+West Norfolk BUG incl social easy rides
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