The 2008 Chevrolet Trucks Trailblazer sits in the final years of GM’s body-on-frame midsize SUV era, a period when buyers still expected real towing, cargo room, and everyday road manners from the same vehicle. That mix matters when choosing tires, because this Trailblazer uses radial fitments in three different sizes depending on sub-model and wheel package: 245/65R17, 245/60R18, or 255/50R20. Base and LT models can share either 17-inch or 18-inch sizing, while the Trailblazer SS moves to a 20-inch setup. The right choice starts with confirming the exact sub-model and wheel diameter, then balancing appearance, intended use, and overall tire character.
Which Tire Size Is Right for The 2008 Chevrolet Trucks Trailblazer
Three tire sizes apply to the 2008 Chevrolet Trucks Trailblazer, and the correct one depends on the exact sub-model and wheel diameter. Base and LT models use either 245/65R17 or 245/60R18, while the Trailblazer SS uses 255/50R20. The first step is confirming whether the SUV has 17-inch, 18-inch, or 20-inch wheels before comparing tire choices within the proper size.
245/60R18 is a metric radial size in which 245 is the nominal section width in millimeters, 60 is the aspect ratio, R identifies radial construction, and 18 is the wheel diameter in inches. On the 2008 Chevrolet Trucks Trailblazer, this size is part of the standard radial fitment range used on certain Base and LT configurations. Its dimensions place it very close in overall height to the 245/65R17 alternative, but it is built for an 18-inch wheel. Choosing this size starts with confirming that the vehicle actually has 18-inch rims rather than assuming all Trailblazers use the same setup.
245/65R17 is a metric radial size that uses a 245-millimeter nominal section width, a 65-series profile, radial construction, and a 17-inch rim. This size applies to certain 2008 Chevrolet Trucks Trailblazer Base and LT models and is one of the primary fitments for the non-SS lineup. Available product choice in this size includes a BFGoodrich All-Terrain T/A KO2 with raised white letter styling, giving buyers a more truck-oriented presentation than a plain highway tire. It is the size to evaluate when the Trailblazer has 17-inch wheels and the goal includes utility-minded road use or a more rugged visual character.
255/50R20 is a metric radial size with a 255-millimeter nominal section width, a 50-series profile, radial construction, and a 20-inch wheel diameter. On the 2008 Chevrolet Trucks Trailblazer, this size is tied to the Trailblazer SS rather than the Base or LT sub-models. Its lower-profile 20-inch format gives it a distinctly different fitment role from the 17-inch and 18-inch sizes used elsewhere in the lineup. Selecting this size means confirming that the vehicle is an SS or has the correct 20-inch wheel setup, since rim diameter alone makes it unsuitable for the smaller-wheel configurations.
Sub-model fitment is not the same across the 2008 Chevrolet Trucks Trailblazer range. Base and LT models share the 17-inch and 18-inch tire-size paths, while the SS uses a separate 20-inch fitment, so identifying the exact sub-model and wheel diameter matters before choosing a tire.
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2008 Chevrolet Trucks Trailblazer Base
The 2008 Chevrolet Trucks Trailblazer Base uses either 245/65R17 or 245/60R18, both in radial construction. Tire selection starts with confirming whether the SUV is on 17-inch or 18-inch wheels, then comparing the available tire style and intended use within that correct size.
The 2008 Chevrolet Trucks Trailblazer LT follows the same two-size pattern as the Base model, using either 245/65R17 or 245/60R18 radial tires. That keeps fitment straightforward once the wheel diameter is verified, but it still matters to match the tire to the actual rim before moving on to sidewall style or tire character.
The 2008 Chevrolet Trucks Trailblazer SS uses 255/50R20 radial tires, separating it clearly from the smaller-wheel Base and LT fitments. That makes the SS decision more specific: confirm the 20-inch wheel setup first, then focus on finding a tire that suits the vehicle’s sub-model-specific stance and road use.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2008 Chevrolet Trucks Trailblazer Tires for Sale
Current product choice centers on 245/65R17, where a BFGoodrich All-Terrain T/A KO2 is available in radial construction with raised white letter styling. That gives buyers a clear comparison point if the Trailblazer is running the 17-inch wheel fitment.
Trailblazer owners usually need to confirm the correct tire size by sub-model and wheel diameter first, then sort through radial construction, sidewall style, product character, and practical fitment checks before putting the SUV back on the road.
Tire Size & Fitment
What tire size fits a 2008 Chevrolet Trucks Trailblazer?
The 2008 Chevrolet Trucks Trailblazer uses three radial tire sizes across the model range: 245/65R17, 245/60R18, and 255/50R20. Base and LT models use either 245/65R17 or 245/60R18, while the Trailblazer SS uses 255/50R20.
That means the correct size is tied to both sub-model and wheel diameter, not just the vehicle name. Checking the actual wheel on the SUV is the most important first step, especially on older vehicles that may have had wheel changes over time. Once the rim size is confirmed, tire selection becomes much more straightforward.
What size rim does a 2008 Chevrolet Trucks Trailblazer use?
A 2008 Chevrolet Trucks Trailblazer can use 17-inch, 18-inch, or 20-inch rims depending on the sub-model and tire size. The 245/65R17 tire uses a 17-inch rim, 245/60R18 uses an 18-inch rim, and 255/50R20 uses a 20-inch rim.
Rim diameter needs to match the tire size exactly, so this is not a detail to guess at. A quick check of the sidewall size already on the vehicle or a direct measurement of the wheel can prevent ordering the wrong tire. It also helps separate Base and LT fitments from the SS setup.
Do all 2008 Chevrolet Trucks Trailblazer sub-models use the same tire size?
No, the 2008 Chevrolet Trucks Trailblazer does not use one tire size across every sub-model. Base and LT models share 245/65R17 and 245/60R18 fitments, while the Trailblazer SS uses 255/50R20.
That difference matters because the SS fitment is built around a 20-inch wheel, while the other Trailblazer versions stay with 17-inch or 18-inch sizing. Anyone replacing tires should confirm the exact sub-model and inspect the wheel diameter on the vehicle, especially if it has been modified or purchased used.
Choosing the Right Tire
What should I consider when choosing a tire for a 2008 Chevrolet Trucks Trailblazer?
Start with the correct size for the exact Trailblazer setup: 245/65R17, 245/60R18, or 255/50R20. From there, the main considerations are radial construction, the vehicle’s wheel diameter, the kind of driving the SUV sees, and whether the tire’s overall character suits a highway, utility, or more aggressive appearance goal.
A Trailblazer that still has its original wheel package calls for a different approach than one with aftermarket wheels or suspension changes. It also helps to compare rim-width compatibility, load figures, and sidewall style where those details are available, since those factors shape both fitment confidence and the finished look.
What sidewall styles are available for 2008 Chevrolet Trucks Trailblazer tires?
Raised white letter styling is available in the 245/65R17 fitment for the 2008 Chevrolet Trucks Trailblazer. That sidewall treatment appears on the BFGoodrich All-Terrain T/A KO2 and gives the tire a more traditional truck and SUV presentation than a plain black sidewall.
Sidewall style matters most when appearance is part of the decision, but it should still come after confirming the correct size and wheel diameter. A raised white letter tire can change the overall visual tone of the Trailblazer, especially on Base and LT models, without changing the vehicle’s required rim size.
What brands offer tires for the 2008 Chevrolet Trucks Trailblazer?
BFGoodrich is available for the 2008 Chevrolet Trucks Trailblazer in the 245/65R17 size. That product appears in the All-Terrain T/A KO2 series and uses radial construction with raised white letter sidewalls.
Brand is only one part of the decision, because the correct Trailblazer fitment still depends on sub-model and wheel diameter first. Once size is confirmed, the useful comparison shifts to tire type, sidewall appearance, load specification, and how the tire’s design matches the way the SUV is actually driven.
Restoration & Appearance
Which tire should I choose for a period-style 2008 Chevrolet Trucks Trailblazer?
A period-style 2008 Chevrolet Trucks Trailblazer starts with using the correct original-format radial size for the exact sub-model and wheel diameter. That means 245/65R17 or 245/60R18 for Base and LT models, or 255/50R20 for the Trailblazer SS, rather than treating the entire lineup as one fitment.
Appearance choices come after size is settled. A more truck-oriented tire character can suit the Trailblazer’s body-on-frame SUV identity, while a lower-profile SS setup carries a different visual message. Anyone pursuing exact showroom-era presentation should compare the vehicle against period photos, sales materials, or marque-specific references before deciding.
How does tire construction affect the appearance of a restored 2008 Chevrolet Trucks Trailblazer?
Tire construction is straightforward on the 2008 Chevrolet Trucks Trailblazer because the primary fitments are radial across all listed sizes. That keeps the vehicle in the modern radial look and avoids the visual shift that older collector vehicles sometimes face when choosing between bias-ply and radial construction.
The bigger appearance difference comes from size, wheel diameter, tread character, and sidewall treatment rather than from construction type alone. On a Base or LT model, a raised white letter all-terrain tire creates a very different look from a milder road-focused tire, while the SS depends heavily on its 20-inch profile for the right stance.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2008 Chevrolet Trucks Trailblazer?
Yes, modifications can affect tire fitment on a 2008 Chevrolet Trucks Trailblazer even when the nominal tire size looks correct. Aftermarket wheels, changes in wheel width, altered offset, suspension lowering or lifting, and brake or body changes can all influence whether a given tire clears properly.
That is especially important on a model range that already uses 17-inch, 18-inch, and 20-inch wheel setups. A Trailblazer that has been changed from its original wheel package should be checked for rim diameter, wheel width, steering clearance, and fender space before new tires are selected or installed.
What should I inspect before driving a 2008 Chevrolet Trucks Trailblazer on new tires?
Before driving a 2008 Chevrolet Trucks Trailblazer on new tires, inspect tire pressure, wheel fastener torque, visible bead seating, and basic clearance at the fenders and steering components. It is also wise to confirm that all four tires match the intended size for the vehicle’s current wheel setup.
A short, careful road test can reveal vibration, rubbing, or steering issues before the SUV is used at normal speeds. On an older Trailblazer, it also makes sense to look over suspension wear, alignment condition, and any signs of air loss after installation so the new tires start life on a stable platform.
How often should tires on a 2008 Chevrolet Trucks Trailblazer be inspected?
Tires on a 2008 Chevrolet Trucks Trailblazer should be inspected regularly, not just when tread looks low. Pressure, tread wear, sidewall condition, cuts, bulges, and signs of uneven wear all deserve routine attention, especially on an SUV that may see a mix of commuting, hauling, and longer highway trips.
Monthly visual checks are a good habit, and an extra inspection before travel is worthwhile. Vehicles that sit for long periods should also be checked for age-related cracking or flat spotting. Catching those issues early helps protect ride quality, preserves the wheel-and-tire setup, and reduces the chance of discovering a problem on the road.
