So this might not be completely "off topic" but I figure its the best place to ask. I got a Garmin Nuvi 260W for Christmas. I've been thinking of getting a mount to put it on the bike. I've noticed on Garmin's website that they have a separate category for cars and motorcycles. Does anyone know what the difference might be between the car navigators and the bike navigators? I realize the ones for the bike are weather resistant and the car ones aren't, but I'm more concerned with the amount of vibration the garmin would receive from the bike and if the untis are built differently in that aspect. Thanks.