VDO Computers Z Series Wireless 2nd Bike Kit - $29.97

If you have a road bike and a mountain bike, and want a realistic picture of all your hard work, mount the VDO Z Series Wireless 2nd Bike Kit to your other bike, and use your VDO Z-series computer to log your miles. This kit allows you to have two different bikes with two different tire sizes tied in to the same computer, so you can see just how much faster you are on one than the other. And, to make things even easier, your VDO computer will auto-detect which bike youre riding no crazy button-punching necessary. - $29.97