2009 Dodge Viper — SRT10 Coupe
The 2009 Dodge Viper SRT10 Coupe 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.
275/35R18 (Front)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (96.3 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.6" |
| Revolutions per mile | ~788 |
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345/30R19 (Rear)
| Section width | 345 mm |
|---|---|
| Aspect ratio (sidewall height) | 30% (103.5 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~27.1" |
| Revolutions per mile | ~743 |
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What this size means for your Dodge Viper
On the 2009 Dodge Viper SRT10 Coupe, the factory 275/35R18 measures about 25.6″ in overall diameter with a 96.3 mm (3.8″) sidewall, and completes roughly 788 revolutions per mile. Its 35-series aspect ratio gives an ultra-low-profile, performance-oriented sidewall that favors steering precision over ride cushioning. In tire terms it is a passenger (P-metric / Euro-metric) size.
This is a staggered setup: the front axle runs 275/35R18 and the rear runs 345/30R19. 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 Dodge Viper 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 2009 Dodge Viper trims
- SRT10 ACR 295/30R18 (Front) / 345/30R19 (Rear)
- SRT10 Convertible 275/35R18 (Front) / 345/30R19 (Rear)
Dodge Viper tire sizes by year
- 2017 Dodge Viper 295/25R19 (Front) / 355/30R19 (Rear)
- 2016 Dodge Viper 295/25R19 (Front) / 355/30R19 (Rear)
- 2015 Dodge Viper 295/30R18 (Front) / 355/30R19 (Rear)
- 2014 Dodge Viper 295/30R18 (Front) / 355/30R19 (Rear)
- 2013 Dodge Viper 295/30R18 (Front) / 355/30R19 (Rear)
- 2008 Dodge Viper 295/30R18 (Front) / 345/30R19 (Rear)
- 2006 Dodge Viper 275/35R18 (Front) / 345/30R19 (Rear)
- 2005 Dodge Viper 275/35R18 (Front) / 345/30R19 (Rear)
- 2004 Dodge Viper 275/35R18 (Front) / 345/30R19 (Rear)
- 2003 Dodge Viper 275/35R18 (Front) / 345/30R19 (Rear)
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.