It carries the "fat" 205/65-15 tyres on the 6,5x15 black wire wheels (which are the current standard with the Roadster)

The spare wheel is in deed the "narrow" 165/80-15 on 5x15 black wire off the current 4/4 (high level brakelight had to be modified to suit it)

Leather is a "special order" from Yarwood (they usually supply Aston Martin & leading furniture makers with this quality), color IS "Chocolate", complimented by black piping & details, plus perforated in certain areas.

4/4 - 165/80R15 radius 322.32 mm
Roadster - 205/60R15 radius 313.43 mm(9 mm less than the 4/4)
Roadster 3.7 - 205/65R 15 radius 323.59 mm (1 mm more than the 4/4 and a full 10mm more than the old Roadster)
Difference in radius equates to difference in ground clearance.
Tyre sizes are my pet hobby horse at the moment due to ground clearance problems on the Plus 4.
You caught me out with adjusting the height of the brake light. Looks much better as a neat fit.
The leather looks just fantastic with the car. Wonderful