Tesla Model Y Tow Capacity
In June 2020, Tesla added an aftermarket Model Y Tow Package to their website. Aftermarket meaning it can be added to a Model Y that didn’t come from the factory with a tow package.
Link to Tesla’s Model Y Tow Package here
There is a chart in the owner’s manual on page 72 that discusses trailer towing, and lists the rated tow capacity depending on the wheel package. The 20″ wheel has a lower tow capacity than both the 19″ and the 21″ wheel packages.
I contacted Tesla on the tire size and effects on towing capacity on the Model Y. They stated that any available combination (supplied by Tesla) of size tire doesn’t change the tow capacity of 3,500 lbs.