Researching this more there just aren't many tires made in this 215/50R18 size with XL load, so I don't believe this will be an option. 225/50R18 has quite a few sizes; but they require an 8" wide rim and will not fit 8.5" wide rims. Most model 3 18" rims are 8.5" or larger. I'm not sure if the larger diameter of a 50 series tire would lower range, potentially negating some of the benefit of 225 width.
So I'm thinking the stock 235/45R18 size is likely the best selection if range is a high priority. Below is a list of the # of XL load rated tire options on discounttire.com - this includes products that are out of stock on backorder.
So I'm thinking the stock 235/45R18 size is likely the best selection if range is a high priority. Below is a list of the # of XL load rated tire options on discounttire.com - this includes products that are out of stock on backorder.
215/50R18 | 2 |
225/50R18 | 25 |
235/45R18 | 81 |
235/40R19 | 67 |
245/40R19 | 94 |
255/40R19 | 81 |
235/35R20 | 23 |
245/35R20 | 60 |
255/35R20 | 62 |