I have a 1989 Bentley Turbo that I have owned for 17 years and only accumulated 19,000 miles. I need to replace the tires due primarily to age. The tire size is 255/65/VR 15 and are only made by Avon at a cost of $2,000 for a set. I am looking for an alternative size. The speed capability is not critical for my use of the car but the load index is since the car weighs over 5,100 lbs. I understand that the tire diameter will not be the same and will effect the speedometer reading. One important issue is the rim width size which is 71/2J. The tire suppliers are reluctant to make any suggestions for fear of legal liability if the car were in an accident. Any ideas or suggestions will be greatly appreciated. Thanks Tom Greasel.