Originally Posted by
amor fati
It's not mentioned very often but this a practical reason for running a 650 in the front.
No, it's the practical reason for learning how to ride your bike properly. Toe down or time your tight turns. Personally, I would never put a 650c wheel on a bike that I intended to ride seriously ever.
Dave Moulton said it well:
http://davesbikeblog.blogspot.com/20...o-problem.html
Toe overlap is not a problem because riding and cornering at normal speed the front wheel never turns far enough for the toe to hit the front wheel. The only time it becomes an issue is when turning sharply at a very slow speed; doing a U-turn on a very narrow road for example. Caution and common sense are all that is required when executing a tight U-turn.