Can you use different grade of wheels on the TwinTube and BarTruss?

Of course you can exchange the wheels to your own preferences, however this combination of wheels is the result of extensive testing.
The softer the wheels, the smoother the ride will be, although after a while flat spots can occur. The harder the wheels the less free play, but the more sound will be generated and the more every single bump will be recognized.
For now we believe  we found have the best combination in terms of hardness. If you have found wheels that exceed ours in specs and usage please feel free to share this and we will include it into our design cycles.