2002 Maserati Spyder — GT
The 2002 Maserati Spyder GT shipped with 2 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
235/40R18 (Front)
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (94 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.4" |
| Revolutions per mile | ~794 |
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265/35R18 (Rear)
| Section width | 265 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (92.8 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.3" |
| Revolutions per mile | ~797 |
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What this size means for your Maserati Spyder
On the 2002 Maserati Spyder GT, the factory 235/40R18 measures about 25.4″ in overall diameter with a 94 mm (3.7″) sidewall, and completes roughly 794 revolutions per mile. Its 40-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a passenger (P-metric / Euro-metric) size.
This is a staggered setup: the front axle runs 235/40R18 and the rear runs 265/35R18. The two sizes are not interchangeable, so order each for its correct axle and don't rotate front-to-rear.
On a vehicle of this age, the Maserati Spyder may have been refitted with a slightly different replacement size somewhere in its life, so check the current sidewall — not just the factory spec — before buying.
Other 2002 Maserati Spyder trims
- Cambiocorsa 235/40R18 (Front) / 265/35R18 (Rear)
Maserati Spyder tire sizes by year
- 2006 Maserati Spyder 235/40R18 (Front) / 265/35R18 (Rear)
- 2005 Maserati Spyder 235/40R18 (Front) / 265/35R18 (Rear)
- 2004 Maserati Spyder 235/40R18 (Front) / 265/35R18 (Rear)
- 2003 Maserati Spyder 235/40R18 (Front) / 265/35R18 (Rear)
- 1991 Maserati Spyder 205/50R15 (Front) / 225/50R15 (Rear)
- 1990 Maserati Spyder 205/50R15 (Front) / 225/50R15 (Rear)
- 1989 Maserati Spyder 205/50R15 (Front) / 225/50R15 (Rear)
- 1988 Maserati Spyder 205/55R16
- 1987 Maserati Spyder 205/60R14
- 1986 Maserati Spyder 205/60R14
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.