The below are the tyre sizes to suit 18″ Rim [Sorted by tyre width]

145/45R18    
165/35R18      165/40R18  
175/45R18    
185/65R18    
195/35R18    
205/35R18      205/40R18      205/45R18
215/35R18      215/40R18      215/45R18
215/50R18      215/55R18  
225/35R18      225/40R18      225/45R18
225/50R18      225/55R18      225/60R18
225/65R18    
235/30R18      235/35R18      235/40R18
235/45R18      235/50R18      235/55R18
235/60R18      235/65R18  
245/35R18      245/40R18      245/45R18
245/50R18      245/60R18      245/65R18
255/30R18      255/35R18      255/40R18
255/45R18      255/50R18      255/55R18
255/60R18      255/65R18      255/70R18
265/35R18      265/40R18      265/45R18
265/60R18      265/65R18      265/70R18
275/35R18      275/40R18      275/45R18
275/55R18      275/60R18      275/65R18
275/70R18      275/75R18  
285/30R18      285/35R18      285/40R18
285/50R18      285/55R18      285/60R18
285/65R18      285/70R18      285/75R18
295/30R18      295/35R18      295/45R18
295/65R18      295/70R18  
305/30R18      305/40R18      305/60R18
305/65R18      305/70R18  
315/30R18    
325/60R18      325/65R18 335/30R18
33/12.5R18 35/12.5R18 37/12.5R18