Overview of the spring black boot rack for Mazda MX5 MK1 MK2 & MK3 £149.95 - YouTube. This car boot rack is 108x42cm in size and can fit most boot-lids between 100cm/39" & 135cm/53" in width. What's most impressive about this car boot rack is the quality of the finish and the simple but very effective design the rack uses to attach to the boot lid.