Originally Posted by
peterw_diy
As jralbert might say, think harder.
To put handlebars the right distance from the saddle, you need to adjust stem length. To use a a shorter stem you'd want a longer top tube. Longer top tube = longer front center (BB to front axle distance). Longer front center = less toe overlap. A bike that "fits" with a 120mm stem but has 20mm of overlap might do better, at least with regard to toe overlap, to have 20mm more top tube and a 20mm shorter stem.
At least that's how I read the fork overhang comment.
It's not that I didn't think hard enough -- bikes have used 100mm stems for eons. Toe overlap is a product of many variables, and only some of them have to do with geometry.