Originally Posted by
maxxevv
Fatter tyres will make a bigger difference than just wheel diameter differences on rougher roads.
Case in point would be BMX tyres (406x1.95") handling much better in gravel and rock chip surfaced roads than a 700x25c or a 700x28c.
Quite true, but given that there are few if any other options for fatter tires for the 16" wheeled Brompton, then I have to move up in wheel size to get any sort of more capable ride. AND if I still want a compact fold, then the Helix potentially offers this combination.
I have also looked at other options such as the Terns, Dahons, etc. but their 20" wheeled models don't fold as much as I would want for travel, and their 24" or larger models don't really fold for travel but more for just convenience. So I'll see what the Helix has to offer.