In 2006, Cadillac Trucks covered two very different luxury-utility missions: the full-size Escalade family and the car-based SRX crossover. That split matters for tires, because 2006 Cadillac Trucks vehicles did not share one universal fitment across the range. Four models are covered here, using six radial sizes in total, with the Escalade, Escalade ESV, and Escalade EXT sharing two larger truck-based sizes while the SRX uses four crossover-specific alternatives on 17- and 18-inch wheels. The first step is confirming whether you have an Escalade-family truck or an SRX, then matching the correct wheel diameter and size before narrowing your tire choice.
Which Tire Size Is Right for Your 2006 Cadillac Trucks
Six tire sizes are used across 2006 Cadillac Trucks vehicles, and they vary by model rather than carrying across the entire range. The real decision starts with identifying whether you have an Escalade-family truck or an SRX, then confirming whether your vehicle is on 17-inch, 18-inch, or 20-inch wheels. Understanding that distinction before choosing a product saves time and helps you match the right tire to the right vehicle.
Year(s): 2006|Fit(s): Escalade, Escalade ESV, Escalade EXT|Construction: Radial|Rim: 17 in
265/70R17 is a metric radial size with a 265-millimeter section width, a 70-series aspect ratio, and fitment for a 17-inch wheel. For this size, BFGoodrich is available with an RWL sidewall, and speed ratings vary by product within the size at S, which carries a 112 mph ceiling across both load versions. This size is specific to the Escalade, Escalade ESV, and Escalade EXT rather than the full 2006 Cadillac Trucks range, making it a fit for owners keeping the factory-style 17-inch wheel setup on those trucks.
Year(s): 2006|Fit(s): Escalade, Escalade ESV, Escalade EXT|Construction: Radial|Rim: 20-in rim
275/55R20 is a metric radial size with a 275-millimeter section width, a 55-series aspect ratio, and fitment for a 20-inch wheel. This size is used only on the Escalade, Escalade ESV, and Escalade EXT, and the available product mix and sidewall styles depend on the specific tire built in that size. It suits owners who need the larger 20-inch Escalade-family fitment and should be chosen only after confirming that the vehicle is actually equipped with the corresponding 20-inch wheel package.
Year(s): 2006|Fit(s): SRX|Construction: Radial|Rim: 17-in rim
235/65R17 is a metric radial size with a 235-millimeter section width, a 65-series aspect ratio, and fitment for a 17-inch wheel. This SRX-specific size uses modern radial construction, and the exact brand, sidewall style, tube status, and speed rating depend on the individual product built in the size. It is the right starting point for SRX owners on a 17-inch setup who want to stay with the dimensions intended for that wheel diameter.
Year(s): 2006|Fit(s): SRX|Construction: Radial|Rim: 17-in rim
255/60R17 is a metric radial size with a 255-millimeter section width, a 60-series aspect ratio, and fitment for a 17-inch wheel. This size is also specific to the SRX, with product details such as brand selection, sidewall treatment, and speed rating depending on the exact tire offered in the size. It is best treated as an SRX fitment to be matched carefully to the vehicle's existing 17-inch wheels rather than assumed interchangeable with the other SRX sizes.
Year(s): 2006|Fit(s): SRX|Construction: Radial|Rim: 18-in rim
235/60R18 is a metric radial size with a 235-millimeter section width, a 60-series aspect ratio, and fitment for an 18-inch wheel. It is an SRX-only fitment, and the exact brand mix, sidewall appearance, and service details vary with the individual tire produced in this size. SRX owners should choose it only when the vehicle is running the corresponding 18-inch wheel diameter, since it does not cross over to the Escalade-family trucks.
Year(s): 2006|Fit(s): SRX|Construction: Radial|Rim: 18-in rim
255/55R18 is a metric radial size with a 255-millimeter section width, a 55-series aspect ratio, and fitment for an 18-inch wheel. This size belongs only to the SRX, and the final choice within the size comes down to the specific tire's construction details, sidewall style, and service rating. It is a correct path for SRX owners with 18-inch wheels who want to stay within the broader factory-size range used on that model.
Four models are covered for 2006 Cadillac Trucks, and tire size varies by model rather than staying the same across the lineup. The Escalade, Escalade ESV, and Escalade EXT share the same two full-size truck fitments, while the SRX uses four crossover-specific sizes on 17- and 18-inch wheels. Select your model below to narrow the fitment history and see the tires that apply to that specific Cadillac.
2006 Cadillac Trucks Escalade
The 2006 Cadillac Escalade was Cadillac's flagship luxury SUV, blending full-size GM truck architecture with upscale trim and a strong street presence. Its tires mount on either 17-inch or 20-inch wheels depending on fitment, so wheel diameter is the key check before moving further.
The Escalade ESV stretched the Escalade formula into a longer-wheelbase luxury SUV with extra cargo and passenger space. Like the standard Escalade, it uses either 17-inch or 20-inch wheel fitments, making wheel diameter confirmation the first step in choosing tires.
The Escalade EXT combined Cadillac luxury cues with the versatility of a crew-cab pickup and an integrated cargo bed. Tire fitment follows the Escalade truck family with options for 17-inch or 20-inch wheels, so matching the tire to the actual wheel package is essential.
The 2006 Cadillac SRX was a more car-like luxury crossover, distinct from the body-on-frame Escalade family in both proportions and tire fitment. Its tires mount on 17-inch or 18-inch wheels depending on configuration, and the SRX uses its own size range rather than the larger Escalade truck sizes.
Two products are available across one of the six tire sizes used on 2006 Cadillac Trucks vehicles. In 265/70R17, BFGoodrich offers two radial choices in the All-Terrain T/A KO2 line, both with RWL sidewalls. Confirm your exact size and wheel diameter before selecting.
These FAQs focus on the split between Escalade-family truck sizes and SRX crossover sizes, along with wheel-diameter checks, sidewall details, load and speed considerations, and long-term care for a lower-use modern Cadillac.
Size Basics & Fitment
What tire sizes fit 2006 Cadillac Trucks vehicles?
2006 Cadillac Trucks vehicles use six tire sizes across four model lines. The Escalade, Escalade ESV, and Escalade EXT use 265/70R17 and 275/55R20, while the SRX uses 235/65R17, 255/60R17, 235/60R18, and 255/55R18. The Escalade-family sizes mount on 17-inch or 20-inch wheels, and the SRX sizes mount on 17-inch or 18-inch wheels.
That means year and make alone are not enough for a correct match on a 2006 Cadillac Trucks page. You need to identify whether you have an Escalade, Escalade ESV, Escalade EXT, or SRX, then confirm the wheel diameter already on the vehicle. For 265/70R17 specifically, the supported rim width range runs from 7.0 to 9.0 inches, which is useful when verifying an Escalade-family wheel before ordering.
What does 265/70R17 mean on a 2006 Cadillac Trucks tire?
On a 2006 Cadillac Trucks tire, 265/70R17 is a metric radial size. The 265 is the section width in millimeters, 70 is the aspect ratio, R indicates radial construction, and 17 is the wheel diameter in inches. On 2006 Cadillac Trucks vehicles, that size applies to the Escalade, Escalade ESV, and Escalade EXT rather than the SRX.
The practical takeaway is that 265/70R17 is not just a number sequence; it describes the tire's basic shape and the wheel it fits. If your Escalade-family truck is on 17-inch wheels, this is one of the correct fitments to investigate further. It is also the only 2006 Cadillac Trucks size here with a confirmed 7.0-to-9.0-inch rim width range and currently available BFGoodrich all-terrain options.
Do all 2006 Cadillac Trucks models use the same tire size?
No. The 2006 Cadillac Trucks range splits into two fitment groups. Escalade, Escalade ESV, and Escalade EXT share 265/70R17 and 275/55R20, while the SRX uses 235/65R17, 255/60R17, 235/60R18, and 255/55R18. All six sizes are radial, but they are tied to different models and wheel diameters.
That difference matters because the full-size Escalade family and the SRX crossover were built around different platforms and tire footprints. A buyer comparing only year and make can easily end up looking at the wrong group of sizes. Start by identifying the model name on the vehicle, then match the tire to the wheel diameter already installed before comparing brands, load ratings, or sidewall appearance.
Buying the Right Tire
What brands make tires for 2006 Cadillac Trucks vehicles?
For 2006 Cadillac Trucks fitments shown here, BFGoodrich is available in 265/70R17 for the Escalade, Escalade ESV, and Escalade EXT. Both products in that size are from the All-Terrain T/A KO2 series and use radial construction. The SRX sizes and the Escalade-family 275/55R20 fitment may have different brand coverage depending on the exact tire being considered.
Brand choice should come after you confirm the correct size, because the available makers can change from one fitment to another even within the same year and make. On an Escalade-family truck running 17-inch wheels, BFGoodrich gives a clear all-terrain option with a recognizable raised-white-letter appearance. If you are matching an SRX or a 20-inch Escalade setup, begin with the size itself and then compare the brands built around that fitment.
What sidewall styles are available for 2006 Cadillac Trucks tires?
A confirmed sidewall style appears in 265/70R17 for 2006 Cadillac Trucks, where the BFGoodrich All-Terrain T/A KO2 uses an RWL, or raised white letter, sidewall. The other 2006 Cadillac Trucks sizes can carry different sidewall treatments depending on the exact tire built in those fitments. Because all of these applications are modern radial sizes, sidewall styling is more about appearance and vehicle character than period restoration accuracy.
On an Escalade-family truck, an RWL sidewall leans toward a more truck-oriented, assertive look than a plain blackwall. That can complement an SUV or pickup with a stronger utility stance, while a cleaner sidewall may better suit a more understated luxury presentation. If appearance matters to you, confirm the sidewall marking on the exact tire before making a final choice, especially when replacing only one axle set.
What is the difference between the two 265/70R17 tires for 2006 Cadillac Trucks?
The two 265/70R17 tires for 2006 Cadillac Trucks are both BFGoodrich All-Terrain T/A KO2 radials with RWL sidewalls and an S speed rating, which carries a 112 mph ceiling. The main differences are load capacity, inflation pressure, and weight. One version carries 2,470 pounds at 50 psi and weighs 45.7 pounds, while the other carries 3,195 pounds at 80 psi and weighs 53.5 pounds.
That means the choice is less about size and more about service range within the same size. Owners should compare the tire's load and pressure profile to how the Escalade, Escalade ESV, or Escalade EXT is actually used, especially if the vehicle sees towing, cargo, or heavier-duty duty cycles. It is also wise to confirm that your wheel is appropriate for the selected service version, even though both share the same 7.0-to-9.0-inch rim width range.
Fitting & Setup
What rim width do 2006 Cadillac Trucks tires require?
A confirmed rim width range appears for one 2006 Cadillac Trucks size: 265/70R17 fits wheels from 7.0 to 9.0 inches wide. That size applies to the Escalade, Escalade ESV, and Escalade EXT. The other sizes in the 2006 Cadillac Trucks range still need to match their correct wheel diameter, but the exact width range depends on the specific tire built in each fitment.
Rim width matters because a tire can share the right diameter yet still be a poor match for the wheel if width falls outside the maker's approved range. For an Escalade-family truck on 17-inch wheels, the 7.0-to-9.0-inch span gives a solid checkpoint before moving ahead. If you are working with an SRX or a 20-inch Escalade setup, verify the exact wheel and tire pairing rather than assuming the same width guidance carries over.
Do 2006 Cadillac Trucks tires require inner tubes?
The 2006 Cadillac Trucks sizes covered here are modern radial fitments, and the confirmed 265/70R17 BFGoodrich options do not carry a tube-type marking in the size description. That points buyers toward contemporary tubeless-style fitment on appropriate wheels. Tube requirements for other 2006 Cadillac Trucks sizes can still depend on the exact tire and wheel combination being used.
For most buyers, the key step is not adding a tube by default, but confirming that the wheel itself is suitable for the tire being installed and that the valve stem, bead seat, and wheel condition are all correct. If a wheel has damage, corrosion, or an unusual prior modification, address that first. A clean, sound wheel and a properly matched tire are more important than assuming all modern sizes are handled the same way.
Maintenance, Storage & Longevity
How should I store a 2006 Cadillac Trucks vehicle when the tires are fitted?
A 2006 Cadillac Trucks vehicle should be stored away from direct sunlight, electric motors, welders, battery chargers, and other ozone-producing equipment that can age rubber over time. Keep the vehicle on a dry surface, maintain inflation pressure, and move it periodically so the tires are not carrying static load in one position for months at a time. Modern radials resist flat-spotting better than older bias-ply designs, but long stationary periods can still affect ride quality.
If a 2006 Cadillac Trucks vehicle is parked for an extended season, many owners either roll the vehicle occasionally or support it in a way that reduces prolonged load on one section of the tire. That is especially useful on heavier Escalade-family trucks. A breathable cover and a clean storage environment do more good than plastic wrapping, which can trap moisture around the wheels and sidewalls.
How long do tires on a 2006 Cadillac Trucks vehicle typically last?
On a 2006 Cadillac Trucks vehicle, tire age usually matters more than mileage once the vehicle becomes a lower-use second car or collector-owned SUV. A sound rule is to begin evaluating tires closely around five to seven years from the date code and to treat around ten years as a serious replacement point even if tread depth still looks acceptable. Rubber compounds harden with time, and sidewall or internal age can outpace visible wear.
That is why a lightly driven Escalade or SRX can still need tires even when the odometer suggests otherwise. Check the DOT date code on every tire, including the spare, and compare age across the full set. If one tire is much newer or older than the others, it is worth considering how that mismatch may affect handling, braking feel, and overall consistency during highway driving.
How often should tires on a 2006 Cadillac Trucks vehicle be inspected?
Tires on a 2006 Cadillac Trucks vehicle should be inspected before every drive and more thoroughly before any extended outing. Look for sidewall cracking, bulges, punctures, uneven tread wear, and any pressure loss from one tire compared with the others. Because these vehicles span both heavier full-size trucks and a crossover platform, an unnoticed pressure issue can change handling feel more quickly than many owners expect.
A monthly close inspection is a good routine even when the vehicle is not being driven much. Pay attention to the inside sidewall as well as the outside, since damage is often easier to miss on the inboard face. If the vehicle has been stored, recheck pressure and tread condition before returning it to regular use rather than assuming the tires are unchanged from the last drive.
Safety & Road Use
Are 2006 Cadillac Trucks tires safe for highway driving?
Yes, 2006 Cadillac Trucks tires can be suitable for highway driving when the correct size, service rating, inflation pressure, and wheel match are all in place. The confirmed 265/70R17 BFGoodrich options carry an S speed rating, which corresponds to a 112 mph ceiling. Since all of the fitments here are radial, they align with the kind of road manners modern drivers expect from a 2006-era SUV or crossover.
In practice, tire safety on the highway depends just as much on condition and vehicle maintenance as on the size code itself. A healthy suspension, proper alignment, and correct pressure matter greatly on an Escalade-family truck because of vehicle weight, and they matter on an SRX because crossover handling can mask a problem until speeds rise. Age, damage, and underinflation are bigger concerns than the nominal size once fitment is correct.
What inflation pressure should I use for 2006 Cadillac Trucks tires?
Inflation pressure for 2006 Cadillac Trucks tires should follow the vehicle placard or owner's manual first, then be checked against the service details of the tire you are actually using. For the two confirmed 265/70R17 BFGoodrich choices, one is rated for 2,470 pounds at 50 psi and the other for 3,195 pounds at 80 psi. Those figures are the tire's maximum load-pressure pairing, not a universal inflation target for every 2006 Cadillac Trucks application.
The important point is never to transfer a pressure figure from one size or service version to another. An Escalade-family truck on 265/70R17 should be inflated according to the vehicle requirement and the tire's service range, while SRX sizes need to be treated according to their own specifications. If the vehicle has replacement wheels or a non-original tire type, confirm the appropriate operating pressure before any long-distance use.
What should I check before taking a 2006 Cadillac Trucks vehicle on a longer drive?
Before a longer drive in a 2006 Cadillac Trucks vehicle, inspect each tire for cracking, cuts, punctures, bulges, uneven wear, and correct cold inflation pressure. Check the spare as well, since a neglected spare is common on vehicles that see occasional use. Make sure the wheel and tire size actually match the vehicle, especially because 2006 Cadillac Trucks fitments split between Escalade-family trucks and the SRX crossover.
Tires are only one part of the pre-drive picture on a modern older luxury vehicle. It is also wise to look over brakes, fluid levels, suspension condition, and battery health before a highway trip. On an Escalade, extra weight and cargo can raise the stakes of a pressure or load mistake, while on an SRX, a crossover used sporadically may hide age-related tire issues until it is driven for an extended distance.
