Covert Spinning bike into Smart Trainer

[thisismyotherbike]

.....if I find a way to connect garmin speed sensor for distance, just wondering hoe accurate the readings will be as I dont want 70km/ph readings if I pedal at 30km/ph??? I assume the flywheel spin much faster as a normal wheel.

 

 

Please so kind and help me on this one!

 

Speed sensors merely count revolutions of the wheel.  You can set the circumference of the wheel to whatever gets you a "realistic" speed.  If the flywheel is tiny, set the wheel circumference to a small number.

[AllAboutRides]

Where and how do I set that on a Garmin device?

[shaper]

Where and how do I set that on a Garmin device?

First item on google when searching how to set wheel size on a garmin device https://support.garmin.com/en-SG/?faq=aXLw3909O4031Yv7zjcw47