For my commuting bike, as I'm sure with many people, one of my biggest frustrations is issues pertaining to my trouser leg and the chainring. I've torn apart a couple of pairs of jeans on the larger ring and these days try to avoid shifting out of it, lest I expose those deadly spikes. The grease and grime is also obviously not particularly appreciated and is a real pain to wash out. I know there are various things to hold my trouser leg in place, but I'm not a huge fan and when I just want a 2 minute jaunt to the shops can be a pain to find and get comfy.

In an attempt to utilise my inner ring a bit more I've been wondering about fitting a bash guard sort of thing outside the outer ring. I've seen cheap plastic ones on some bikes but no idea where I can find a nice light metal one to go on my road bike. Does anyone know where I may be able to get one?

Also just wondering of any experience people might have using one? Does it help with the trouser leg being swallowed up problem? Does it interfere with the chain or derailleur at all?

Thanks for any help you can give.