hmm .. 1 reason why cantilever+v-brakes are better than disc
- Thread starter 02gf74
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jimo746":3y3rda58 said:I've used Ashima discs for ages (just recently sold an unused disc rotor :shockand this is the 1st I've heard of it :? Yes they are supposed to be weight weenie discs and if I was doing any kind of hardcore riding then I'd use something more substantial but....
In the Singletrack thread (I haven't re-read it but I did follow it when it was first posted) didn't the matter of mounting direction come up? In other words, whether the spokes were set up to be trailing or leading and the fact that the manufacturer had changed their recommendation as to which was the prefered orientation ?
Or something like that - I'll have to have another skeet.
*Edit* - I've had another read and this does seem to be the case.
yes - the manufacturer change the direction of the arrow.
anyways, been thinking a bit about this.
bolts when done up correctly clamp the two pieces together and the friction between them is what holds the parts together, especially in side shear situation like here.
So if the bolt was tight, the stress would be above the bolt hole, as per red dotted line in top diagram.
If the bolt was lose, then force is "pivoting" around the bolt and will along the red line, which happens to be the thinnest part of the rotor.
It'd be interesting to see photos of the other failed rotors.
anyways, been thinking a bit about this.
bolts when done up correctly clamp the two pieces together and the friction between them is what holds the parts together, especially in side shear situation like here.
So if the bolt was tight, the stress would be above the bolt hole, as per red dotted line in top diagram.
If the bolt was lose, then force is "pivoting" around the bolt and will along the red line, which happens to be the thinnest part of the rotor.
It'd be interesting to see photos of the other failed rotors.
