I seriously have no idea where such a bumper would even go, let alone what it would look like. And it's not my bike, it's dozens of ones that I have owned or se

I seriously have no idea where such a bumper would even go, let alone what it would look like. And it's not my bike, it's dozens of ones that I have owned or seen. It's also far easier to imagine the lack of something rather than the existence of something you've never even heard of. A simple link to a photo would be quite helpful.