Can I use a Modern Spare designed for a Tesla Model 3 on my Tesla Model Y and vice versa?

Although the Tesla Model 3 and Model Y share many identical specifications, the ways in which they differ are critical. Does this apply to the Model S and Model X?

The official answer to this question is no, the spare tire assemblies are not interchangeable. Details below clarify your options if you have changed vehicles

What is the difference between the two spare tire kits? The Model Y and Model 3 share the same wheel lug pattern of 5x114.3mm (often referred to as the PCD). However, each model has a specific overall tire diameter. The tires on a Model Y are significantly taller than those on a Model 3. This remains true regardless of the wheel options chosen or the car's trim level. As a reminder, wheel size and tire size are distinct measurements. Tire size is not necessarily influenced by wheel size, as discussed here. Tesla vehicles are particularly sensitive to having a spare tire that strays too far from the specific overall diameter compared to the other three tires on the vehicle.

Because of this, Modern Spare provides distinctly different tire sizes for the Model 3 and Y. The traction control system in your Tesla is quite sophisticated. If you use a Model 3 Spare Tire Kit on your Model Y, the system may detect a loss of traction and continuously attempt to correct it. This can place significant stress on the vehicle's drivetrain. The same is true when using a Model Y Spare Tire Kit on a Model 3, with the added concern of sufficient steering clearances. The Model Y spare tire is taller and may not clear the front steering components during use.   

Does this apply to the Model S and Model X?

Just as the Model Y and Model 3 are each similar to one another, the Model S and Model X share similarities as well. They both have the same bolt pattern of 5X120mm. The primary difference lies in tire size, with the tire diameter between the S and X being significant enough to prevent a universal fit between the two models.  

I've heard that there are some situations where one can be used in place of the other. Is this accurate?

There is one exception to this explanation, which should only be considered in emergency situations. A Model 3 Spare Tire Kit could work on a Model Y, but only after the traction control system is adjusted to its most inactive setting (slip-start mode). Once this adjustment is made, the spare should only be used for short distances and at reduced speeds. Do not operate the Model 3 on the Model Y at high speeds or near highway conditions, nor for distances exceeding 20 miles. The Model Y Spare Tire Kit should not be used on the Model 3. 

What if we own a Modern Spare Kit for one of these models but have since purchased or currently own the other model? 

If you own a spare tire kit for a Model 3 but now have a Model Y, it’s unnecessary to purchase an entirely new kit. Modern Spare offers replacement tires since the main difference is the tire size. Simply replacing the tire on your spare wheel is a great money-saving option compared to buying a kit for your new model. If you’re transitioning from a Model 3 to a Model Y, you might need to buy a new storage case because the tire size for the Model Y is too large for the case used with the Model 3 kit. 
The same applies to owners of the S and X models. If you have recently switched between these two models, there may be an option to simply change the tire instead of purchasing a whole kit. This is not as straightforward as with the Y and 3, but we can assist you further if needed. 

If you need to update a kit instead of purchasing a completely new one, please reach out to our support staff for assistance.