Shopping Cooper in Seattle? Seattle Tire Shop stocks and orders across the Cooper range for drivers in Seattle, WA. The badge on the sidewall matters less than which line inside it suits how you actually drive, and what that line costs once it is on the car — so tell us the vehicle and the miles you put on it, and we will tell you which Cooper is worth your money and which one is not.
The Cooper range, by what each line is for
These are Cooper’s main current lines. Not every line comes in every size, so tell us the size off your sidewall and we will tell you which of these fit your car and what each one costs installed.
- Endeavor — touring all-season for sedans and crossovers
- CS5 Ultra Touring — grand-touring all-season for cars
- Discoverer Road+Trail AT — on-road-first all-terrain for crossovers and SUVs
- Discoverer AT3 4S — all-terrain for pickups and SUVs, severe-snow rated
- Discoverer AT3 XLT — heavier-duty all-terrain for work trucks
- Discoverer STT Pro — mud-terrain for off-road use
- Discoverer True North — winter tire for cars and SUVs
What Cooper costs installed in Seattle
A Cooper price that is only the tire is not a price. Our quote is the out-the-door total: the tires, mounting, balancing, new valve stems or TPMS service kits, disposal of the old set, and tax. And before anything is mounted we read you the DOT code off the sidewall — the last four digits are the week and year that tire was built, because new is not a date.
Cooper is an American, value-mainstream tire brand built around light-truck and SUV strength at a price below the premium tier. Its Discoverer family runs from an on-road-first all-terrain to a dedicated mud-terrain, so the right pick depends on how much time the truck actually spends off pavement versus commuting.
Cooper's reputation is built on light-truck and SUV tires priced below the premium tier without feeling like a bargain-bin compromise — that's the gap it's aimed at. Someone chasing the smoothest, highest-mileage ride a tire can give, or a committed rock-crawler wanting something more extreme than a general mud-terrain, is better matched to a tire built specifically for one end of that spectrum rather than the middle ground Cooper covers well.
Where Cooper differs from a single all-purpose tire is the spread inside its own Discoverer name: some of those tires are built for a smooth highway ride with occasional dirt, others for genuine mud and rock. Matching the right one to how the truck is actually used matters more than the badge on the sidewall.
Which Discoverer fits how you actually drive?
A crossover or SUV that rarely leaves pavement is better matched to the Discoverer Road+Trail AT, an all-terrain built on-road-first rather than for serious dirt. A car that never goes off-road at all doesn't need an all-terrain tread in the first place — the Endeavor is a plain touring all-season, and the CS5 Ultra Touring steps up from that for a quieter, more comfort-focused ride.
Once a pickup or SUV spends real time on gravel or trail, the Discoverer AT3 4S carries a severe-snow rating alongside its all-terrain tread, and the AT3 XLT is the heavier-duty version of the same idea for a work truck carrying load. The Discoverer STT Pro sits at the far end of that range — a mud-terrain tire built for actual off-road use, where on-road manners give way to traction in the dirt.
What to check before you commit to a set
Two things are worth checking with your own eyes before any purchase: the placard inside the driver's door jamb, which lists the size, load index and speed rating the vehicle actually needs, and the DOT code on the sidewall — four digits for the week and year it was built.
Manufacturer tread warranties pay out on a pro-rated basis tied to remaining tread depth — they are not a replacement guarantee. Wear from misalignment, low pressure, curb strikes and impact damage is typically excluded, and the fine print changes line to line, so ask what's covered on whichever Discoverer is being quoted.
Western Washington's wet roads and occasional mountain snow are both reasons the severe-snow rating on the AT3 4S matters more here than it would somewhere dry year-round; the Discoverer True North is the dedicated winter option if a vehicle needs one beyond what an all-terrain can cover.
What's the difference between Cooper's AT3 4S and AT3 XLT?
Both are all-terrain tires with a severe-snow rating, but the XLT is built heavier-duty for a work truck carrying more load, while the 4S is sized more for a standard pickup or SUV. Which one fits depends on the truck's actual use, not just its size.
Is the Discoverer STT Pro too aggressive for daily driving?
It's a mud-terrain tire, which trades on-road comfort and quiet for traction in the dirt — that tradeoff is worth it only if the truck genuinely goes off-road often. For a truck that's mostly on pavement with occasional trail use, the Discoverer AT3 4S or Road+Trail AT keeps more of that on-road manner.
Do I need the Discoverer True North if I already run an all-terrain Cooper?
An all-terrain with a severe-snow rating, like the AT3 4S, covers moderate winter conditions on its own. A dedicated winter tire like the True North is worth asking about only if the vehicle regularly drives in heavier snow than that rating is built for.