Hi I own or have owned all the bikes mentioned

The belt on a new Strida won't jump due to a new roller which keeps the belt in contact with the rear pully (no need to 'over' tension the belt any more

The new Strida III(a) has the option of metal wheels (very pretty) and much higher tyre pressures

The Strida is the only bike you can easily wheel along for long distances (folded)

Make sure you get the upgrade kit with the folding bars, pedals etc

Order it online, it usually arrives next day, start to enjoy!

Steering may seem a tad skittish for first few hundred yards

Strida operate a 60 day money back guarantee, so if it isn't suitable you can change it.

How tall are you?