i've got a Cotic Roadrat, and the disc mount on the fork is on the right hand side (as you're seated). However, the front rotor of the avid BB5s (road) i just bought can only be fit on the left fork if I am to follow the installation instructions to the letter - ie rotation must follow the arrow, and the writing must be facing outward. Can I use this rotor on the right hand side? That is, keep the rotation correct, but have the writing facing inwards? Are both sides the an avid rotor the same? I assume its the direction of rotation that is the important bit, and not the surface. Thanks, PB
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Rotors are identical on both sides but are marked to ensure correct rotation as they aren't bi-directional. Few hubs and forks allow for a right hand mounted disc so rotors are only marked for left hand set up. The water and mud shedding capabilities drives the design and direction they should turn.
The earlier Roadrat RB2 was designed for a right hand mounted disc brake (outwards facing on front fork) to negate pressures put on the wheel when braking. The wheel was simply reversed in the drop out. The new RB3 fork has a left hand mounted disc brake but uses a 9mm thru-axle design which integrates with current 9mm QR hubs. Lawyer lugs achieve the same thing.