Originally Posted by
Jipe
The loss is minimal and on rough road you actually ride faster with a suspended bike than with a not suspended bike. And if you want even more confort, with the 18" wheels you can mount 50mm wide Big Apple tires.
I agree that on very rough pavement, shocks make the bike faster. And while you find the loss minimal, I found it constant. Over the years I had two Moultons and eventually parted with them. I have not had a Birdy. My small wheel bike is my Brompton, which has a shock and needs the shock for comfort.