Originally Posted by
rpenmanparker
Interesting you say that. The advantage of the lower BB would be to produce more stack WITHOUT THE NECESSITY OF INCREASING THE TOP TUBE LENGTH. But it isn't hard to get a bike with more stack. It is only a problem if you want that extra stack without more reach too. (I should mention it is not as much of a problem these days with endurance geometries.) But if you are going to increase reach at the same time as stack, why not just use a more normal BB height and move up to the next size bike?
In my size deGroot's HT length at 226 is super tall as you describe it--taller than my 220. If the deGroot accommodates larger tires than other comfort/endurance bikes it's only because there is more clearance at the brakes. Many of the latest comfort/endurance road bikes are designed for 25s. A larger tire width isn't a problem but the brake mounts have 28s practically scraping the calipers.