2010 Cadillac SRX — 3.0L FWD Premium
The 2010 Cadillac SRX 3.0L FWD Premium 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.
235/65R18
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 65% (152.8 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~30" |
| Revolutions per mile | ~672 |
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235/55R20
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 55% (129.3 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~30.2" |
| Revolutions per mile | ~668 |
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What this size means for your Cadillac SRX
On the 2010 Cadillac SRX 3.0L FWD Premium, the factory 235/65R18 measures about 30″ in overall diameter with a 152.8 mm (6″) sidewall, and completes roughly 672 revolutions per mile. Its 65-series aspect ratio gives a taller, comfort-biased sidewall that favors ride quality and shrugs off rough pavement. In tire terms it is a passenger (P-metric / Euro-metric) size.
The 235/65R18 and 235/55R20 roll within 0.2″ (0.7%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
On a vehicle of this age, the Cadillac SRX 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 2010 Cadillac SRX trims
- 2.8L Turbo AWD Performance 235/55R20
- 2.8L Turbo AWD Premium 235/55R20
- 3.0L AWD Luxury 235/65R18
- 3.0L AWD Performance 235/55R20
- 3.0L AWD Premium 235/55R20
- 3.0L FWD Base 235/65R18
- 3.0L FWD Luxury 235/65R18
- 3.0L FWD Performance 235/55R20
Cadillac SRX tire sizes by year
- 2016 Cadillac SRX 235/65R18 / 235/55R20
- 2015 Cadillac SRX 235/65R18 / 235/55R20
- 2014 Cadillac SRX 235/65R18 / 235/55R20
- 2013 Cadillac SRX 235/65R18
- 2012 Cadillac SRX 235/65R18
- 2011 Cadillac SRX 235/55R20
- 2009 Cadillac SRX 235/65R17 (Front) / 255/60R17 (Rear)
- 2008 Cadillac SRX 235/65R17 (Front) / 255/60R17 (Rear)
- 2007 Cadillac SRX 235/65R17 (Front) / 255/60R17 (Rear)
- 2006 Cadillac SRX 235/65R17 (Front) / 255/60R17 (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.