TireIndex
Cooper Discoverer STT PRO price index
What does the Cooper Discoverer STT PRO actually cost? Median, range, and trend across our tracked US retailers — refreshed on every ingest.
Where it's cheapest today
Each retailer's lowest current listing for the Cooper Discoverer STT PRO. Multiple sizes per retailer collapsed to the cheapest. Prices update on every catalog sync.
| Retailer | Lowest price | Above cheapest | Captured | |
|---|---|---|---|---|
| TireAgent | $243.37 | cheapest | View → | |
| PriorityTire | $249.99 | +$6.62 (+2.7%) | View → |
Price trend (last 90 days)
Specs, sizes & reviews for the Cooper Discoverer STT PRO →
How this number is built
This index aggregates every listing of the Cooper Discoverer STT PRO we've snapshotted across our tracked retailers (currently TireAgent, PriorityTire, Discount Tire, 1010tires, with more coming online). For each retailer we use the cheapest current listing for the model across all sizes the retailer stocks. We then report the median, range, and spread across retailers.
The "spread" is the percentage gap between the cheapest and most-expensive retailer's lowest current listing. A high spread means retailers disagree sharply on price for the same tire model — the strongest signal that shopping around is worth it.
Caveats worth knowing:
- Different sizes of the same model carry different prices. A 235/40R18 and a 285/30R20 are both the Discoverer STT PRO but engineered and priced differently. For exact same-size comparisons, see our compare pages.
- Listed retailer prices are before installation. Mount, balance, and disposal vary by shop — see our install-cost calculator.
- Snapshot count for this model: 84 listings since we began tracking.
Inspired by Matt Cortland's Guinndex, which surfaces the price of a Guinness pint across Irish pubs. The Tirefolio TireIndex applies the same transparency principle to the US tire market.
Frequently asked questions
Why does this tire cost different amounts at different retailers?
Tire retailers buy from regional distributors at varying wholesale prices, run different promotional cycles, and absorb shipping costs differently. Across our 30-day window, the lowest current listing for the Cooper Discoverer STT PRO was $243.37 (at TireAgent) and the highest was $249.99 (at PriorityTire) — a difference of $6.62 (3%) for the same tire model.
How often is the TireIndex updated?
Listings refresh whenever our scrapers run — typically every 24 hours. Each refresh writes a new daily snapshot, building the time series that powers the trend chart. The "Captured" date on each retailer row shows when that specific listing was last seen.
Are these installed prices?
No — these are the retailer's listed prices for the tire itself, not including mount, balance, disposal, or TPMS service. For an installed-cost estimate, use our install-cost calculator, which factors in your state's typical fees.
What counts as a "retailer" here?
We track US-shipping online tire retailers: TireAgent, PriorityTire, Discount Tire, 1010tires, with TireRack, TireBuyer, SimpleTire, and Tires Easy in active rollout. Local installers and independent shops are not yet included — see our methodology page for more.
Last verified 2026-05-21.