I was brave with our new Kudos K16 of putting a single gear,especially after my criticism of the lack of gears on the G-tech.
But the usage of the bike is important,the K16 was intended as a light (15kgs) commuter bike ,it is intended to cycle at 12-15 mph,so high speed is not a priority,with this in mind we put a small diameter chainring to offer rider assisted hill climbing.
The K-16 is very fast accelerating,it is nimble and quick at low speed and is an exceptional hill climber but it was never intended to be a high speed sports bike.
I don't think you can put a big chainring on a single speed bike unless you have legs like Wiggo to pull away or hill climbing.
However,we increased the chainring size on our Kudos Secret to lower the cadence at speed and make the gears more useful,the Secret is therefore more suitable if longer range at speed is important.
It's a case of 'horses for courses'.
The K-16 is selling the best of any new bike release of the Kudos range,it does a job that is not satisfied by other e-bikes and the fun colours are attracting a younger buyer to the world of e-bikes.
KudosDave