Rare Legitimate Friction Drive Applications When Friction Drives Might Make Sense Scenario 1 : Temporary Trial Conversion Use Case: Testing electric assistance before committing to permanent conversion Advantage: Complete reversibility (remove in 5 minutes) Limitation: Poor performance discourages rather than encouraging electric cycling Better Alternative: Rent quality e-bike for realistic experience Scenario 2: Multiple Bike Rotation Use Case: Moving single motor between several bicycles regularly Advantage: Quick transfer without wheel swapping Limitation: Efficiency losses, weather dependency, adjustment tedious Better Alternative: Affordable hub motor kit per bike or primary bike conversion Scenario 3 : Extreme Budget Constraint Use Case: Absolutely minimal investment priority over all else Advantage: Lowest possible conversion cost (minimal components) Limitation: Performance so poor creates dissatisfaction and abandonment Better Alternative: Save longer for quality hub motor delivering satisfaction Reality Check: Even these narrow scenarios better served by alternative solutionsfriction drives' apparent advantages (simplicity, low cost, reversibility) undermined by fundamental performance inadequacies creating user dissatisfaction, abandonment, and wasted investment despite lower initial cost

The run is in full force, and it generally only lasts several weeks
We use hundreds of ping pong balls, of course
This is what people refer to when they say they need stability in their life
Maybe, because they have higher Vo2Max. Therefore, Martin Sundqvist believes that Vo2Max and specific strength development are the keys to success using the double-poling technique