Originally Posted by
Andy_K
I suspect the reason nobody makes a 52T-compitble chain guard is that the combination doesn't really make sense. A bike that has a 52T ring should get paired with spandex. Granted, older quasi-racing bikes are becoming city cruisers these days and bike manufacturers continue to produce bikes that look good on a spec sheet rather than bikes that have practical uses, so I can imagine how you might have a bike in mind that makes sense for a chainguard but has a 52T ring. I can't, however, imagine a situation in which you'd ever need a 52T ring on a bike that you were using in ways that made a chainguard practical.
Out of curiosity, what's the bike?
While I can see where you're coming from, I can think of several different situations where one could use some sort of chainring or chainguard on their 52 tooth bike -
1. They want to use their old road bike for commuting
2. They don't have room for more than 1 bike and they want to commute during the week and road ride on the weekend on the same bike
3. They ride to work, then from work join up with their road riding riding group (after work) (probably the least likely as they'd have to bring a change of clothes either way)
4. Any of the above and they don't want to get their ankle dirty with grease from the chain