Okay, so as I state in my Product Review Rating System, it’s hard to receive better than a 3 Broken-Down Car rating if I have to modify anything to make the product work properly. This is the case with the Planet Bike Flipper. I mounted the Flipper on my commuter mountain bike to eliminate the disgusting brown streak you get on your butt and back without a fender. I quickly realized two modifications needed to be made. First, the Flipper has only one point of contact — the seatpost. To maintain its position over the wheel it must have good rotational stability. This is not the case with the Flipper. I had to add a piece of rubber under the front of the fabric strap so that the securing mechanism had better purchase on the seatpost. I was still getting the dreaded brown streak even with the Flipper so I had to drill holes in the back and add an extension (made from a plastic orange juice carton). This worked well and now the Flipper meets my needs.

The Flipper gets a 3 Broken-down Car rating.

My Modified Flipper:

Modified Planet Bike Flipper