Garmin Forerunner 305 Cadence & Bike Mount?

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I have the bike mount and cadence for the 305. I don't have any other computer on my bike. I use the cadence on my bike in the trainer. We use Sport Tracks and I like being able to download my rides and compare them.

I do this, too, except I use RunningAHEAD.com, which was my running log long before I started cycling.

I actually have 2 bike mounts. One is sort of a pseudo-wrist that I use 99% of the time and the other is a mount that I can pop the Garmin in and out of without the wrist straps attached--I use that for duathlons (then I have a special wrist-strap with a matching mount, so I can pop it from wrist to bike and back to wrist for each leg).