Review on YS Wireless Waterproof Bicycle Speedometer & Odometer With LCD Display & Multi-Functions - Track Your Ride! by Chris Horton

Got this to replace my old, nonworking, wired speedometer from the late '80's. Went on fairly easy. The only concern I have is the pick up unit is very large and sticks out on the fork over an inch. It flexes pretty easy and could possible get bumped and move towards the spokes. Going forward is not a problem but if it moved and the bike rolled backwards I can see where magnet and pickup unit could get hung up and possibly break something. Time will tell.