Loving the Zwift Experience and passing the word around about having a go, especially with the whole Covid/lockdown thing. To save money, I’m running on a (really) dumb (unlisted) turbo trainer i bought way back in the day when i was a triathlete. I don’t mind if its calibrated or not; i ride unti…

The only way would be to use a power meter.

This is how your speed is determined on a classic “dumb” trainer. [image] How Does Zwift Determine My Speed? Bugs and Support How Does Zwift Determine My Speed? For Wheel-on Classic Trainers: Zwift takes the wheel speed broadcast by your speed sensor and the power curve …

Hi @Rob_Pearce Welcome to the Forum. It depend on what trainer you have, if it a mag trainer you can change the resistance lever higher until it is more reasonable. I have done that with a power tap wheel. I changed the resistance leaver until it closely matched the PT wheel.

Thanks for the detail Mike; my trainer is magnetic and non-adjustable - despite those limitations I’m sure it obeys the laws of physics and provides exponential resistance at least.

True, but the power curve that Zwift puts you on is what can’t be changed and may not be accurate.

Thanks for the advice Gerrie - i was hoping there was some rule of thumb spindown type test - but i see the sense in using your method or some other kind of power meter.

Nube: how to calibrate a dumb Trainer

General Discussion

Mike_Rowe1 (Mike) June 29, 2020, 1:34pm 3

This is how your speed is determined on a classic “dumb” trainer.

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Nube: how to calibrate a dumb Trainer

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