Teslas, like many vehicles come with cast wheels from the factory. Cast wheels are typically less expensive to manufacture and heavier. They are also susceptible to cracking. To avoid this issue all together getting a nice set of flow form or forged wheels is a good idea. Both types of wheel are typically stronger and lighter. They will also bend rather than crack so can often be repaired.
If you opt for a different type of wheel it's crucial to pick a wheel that is made to fit on and handle the weight of a Tesla. Most wheels are not made to handle the SUV equivalent weight of a Model S and many are not designed to fit on a Tesla which can result in warped brake rotors.
We designed our own wheels to be both stronger and lighter than factory.
We used flow form technology for our UP-01s which gives strength similar to forging without the cost. They're also rated to withstand 2145lbs per wheel which translates into almost double the weight of an S for a set of 4 and they come with removable rim protectors to protect against side impact. Tesla was originally going to use BBS as their wheel supplier before switching to a less expensive option.
Our UP-02's are our forged option. They are both stronger and much lighter than a set of factory wheels. Currently, our 22" UP-02s for Model X weigh in at just 27lbs which is about 13lbs lighter than factory. With tires mounted they are even lighter than the factory 20's for Model X. They are also able to bend where the factory cast wheels would crack.
Whether you're interested in a modified look or not a good set of flow form or forged wheels is something to consider for better range and damage resistance