I currently run 205/75/15s on my 69 Series 2 coupe. I've owned the car since 1989 and it came with a 185VR15 Dunlop SP Sport (DOT 142) as a spare. In the over 30 years I've owned the E, I have never needed a spare, but not interested in taking a chance on this way old Dunlop, so would like to replace it with a new tire. Question that I have is, without taking off one of the 205s on the car, would a 205/75/15 fit in the spare tire bin? Tried measuring with a caliper, also just eyeballing it, looks like there is clearance both for the overall diameter of the tire, but also so that the boot bin board would fit back in place. I understand tire numerology, but without an aspect ratio on the old Dunlop, I need some help.

 

The Dunlop has an aspect ratio of about 83, believe it or not. You can get a Vredestein 185R15 for spare, there's no need for it to be a 205.