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Our ROADHOG forks caused a bit of a stir when they were released to
compliment our ROADRAT frame. Why? Well, as you can see from the
photo, the disc mount is positioned on the front right of the fork
rather than the more usual left rear. As always with Cotic products,
there were firm engineering reasons for Our ROADHOG forks caused a bit
of a stir when they were released to compliment our ROADRAT frame.
Why? Well, as you can see from the photo, the disc mount is positioned
on the front right of the fork rather than the more usual left rear.
As always with Cotic products, there were firm engineering reasons for
placing it where it is, and here's the lowdown:Forces Axle movement under disc braking is now a fairly well known
phenomenon in mountain biking. Basically with the caliper positioned
left rear (usual place), and a vertical dropout, there is a reaction
of the braking force which tends to push the axle out of the dropout,
hence you're relying on the friction of your QR to counteract this
rather than a completely mechanical stop. Most manufacturers have
moved to a slightly forward facing dropout to counteract this.We've actually never experienced any trouble with this on our mountain
bikes, but during prototype testing of the ROADHOG fork - which had
the disc mount in the usual left rear position - we did actually
experience some axle movement. Nothing actually came undone, but after
some serious downhill braking on fast roads, the rotors would be
rubbing a touch and the wheel would 'clunk' home in the dropout when
we undid the axle nuts. This was clearly unacceptable, so we set about
finding a solution. Our first port of call was forward facing
dropouts, but these would have required custom cut version which would
have increased the fork cost disproportionately. Therefore the design
problem became how to contain the disc forces whilst using an off the
shelf vertical dropout. The solution, as you can see, was to place the
disc mounting on the front. This puts all the forces into the dropout,
and is still a completely normal International Standard setup, so it
takes any IS caliper. It also gets the brake away from the back of the
fork which brings us to.... it where it is, and here's the lowdown:Forces Axle movement under disc braking is now a fairly well known
phenomenon in mountain biking. Basically with the caliper positioned
left rear (usual place), and a vertical dropout, there is a reaction
of the braking force which tends to push the axle out of the dropout,
hence you're relying on the friction of your QR to counteract this
rather than a completely mechanical stop. Most manufacturers have
moved to a slightly forward facing dropout to counteract this.We've actually never experienced any trouble with this on our mountain
bikes, but during prototype testing of the ROADHOG fork - which had
the disc mount in the usual left rear position - we did actually
experience some axle movement. Nothing actually came undone, but after
some serious downhill braking on fast roads, the rotors would be
rubbing a touch and the wheel would 'clunk' home in the dropout when
we undid the axle nuts. This was clearly unacceptable, so we set about
finding a solution. Our first port of call was forward facing
dropouts, but these would have required custom cut version which would
have increased the fork cost disproportionately. Therefore the design
problem became how to contain the disc forces whilst using an off the
shelf vertical dropout. The solution, as you can see, was to place the
disc mounting on the front. This puts all the forces into the dropout,
and is still a completely normal International Standard setup, so it
takes any IS caliper. It also gets the brake away from the back of the
fork which brings us to....
Don't suppose you know why they have it on the other side than every other fork?