Yes, although a 205/50/15 will give you the same diameter as the OEM 175/65/14 and will not alter the speedo reading
205/60R16
The factory tire size for the 1996 Toyota Avalon is: 205/65-15
205/55/15
205/65r15
205/65HR15
205/70/14
205/65/r15
205/65r15
4 Cylinder: 205/65 R15 92H
Stock on a 4 cyl is 205/65/r15
205/75/15
205/65-r15 or 195/70-r14