So I stopped by a friends house on the way home the other evening and he gave me a cyclepro mentor-8 and the install direction are not to clear.

Were do I mount the magneto pickup on the front fork, inboard closer to the hub, or near the outside diameter of the rim ?? it does state it specifically.

Follow the instructions!

Does it matter? The end of the spoke will do as many revolutions as the tip of the spoke. The magent counts revolutions of the wheel via magnet with the circumference entered into the computer.

Usually the instructions will state the max distance between the sensor and the magnet. Find a place on the fork where the distance isn't greater than that and you should be fine. For me this is often a few inches below the brake caliper.

-spence

It does not matter. It counts revolutions, and a revolution is the same regardless of where it is.

Put it as far out as possible. The magnet will be moving much faster, amd your speeds will improve.

I have the same question. In particular, I am worried that wheel balance might be an issue to think about. Is it?

Nope, as long as it works it's probably in a good spot.

It really doesn't matter. There is, however, a belief that putting the magnet towards the hub is better because weight at the rim slows acceleration by making more weight's inertia to overcome. In theory that's true but in reality the position of the magnet is irrelevant so put it where it can talk to the sensor.

I usually mount the magnet opposite of the valve stem (balance) and about half way out on the wheel (I'm an average kind of guy) I mount the pickup forward of the fork so that in the event of the pickup getting bumped, it will be pushed away from the fork/wheel rather into it. YMMV.

Hey, have you used that line @ any parties before? I got a guy you should hang out with.

The simplest rule is anywhere that works and is convenient.


Closer to the hub means the magnet passes by the sensor at a lower speed. This can increase reliability.

https://sheldonbrown.com/cyclecomputer-installation.html

The distance between the magnet and the sensor can't be too large.

===============

The amount of weight is so small that it would be pretty-much impossible to measure, let alone feel, the difference.

Where ever you can get it positioned to pick up the revolutions and stay securely in place. Other than that, no rules, which is why the instructions don't have any.


No, put it as close to the hub possible. It reduces rotational weight.


For most rims, the seam is heavier than the stem, so if you're trying to balance the weight (not that it helps), you want it on a spoke that leads to the stem.