What makes a bike stable at speed? Long wheelbase and tires are the only thing I can think of - but most road bikes I see don't really have a long wheelbase. I have the following bike:
and yesterday, I hit 41.27 mph downhill - and it was freaking scary. The bike was distinctly skittish - I don't think I'll try that again. I also lost a light - fell off with the vibration. And I'm running 700x32 tires (stock Nimbus) - thinner tires would make it worse.
So .. is there something inherently wrong with the bike geometry to not encourage higher speeds? Or is it the wider handlebar, or not-so-great tires? Or is it just that I need to HTFU? Not that I intend to repeat the experiment - just curious