Cheap solution
I have always just gotten a liter coke plastic bottle and I cut it in half length wise then put two zip ties on it an attach it to the down tube in the most strategic position. It works awesome and cost nearly nothing.
I have always just gotten a liter coke plastic bottle and I cut it in half length wise then put two zip ties on it an attach it to the down tube in the most strategic position. It works awesome and cost nearly nothing.