# Cooper Discoverer AT3 4S/LT Tacoma Review Cooper Discoverer AT3 4S/LT scored for Tacoma use: 7.6/10 blended, strongest on quiet, settled highway manners (8/10), weakest on mud clearing (4/10), in 10 Tacoma sizes. ## Canonical URL https://tacotires.com/tires/cooper-discoverer-at3-4s-lt ## The short answer - The Cooper Discoverer AT3 4S/LT is a mid-priced all-terrain that blends to 7.6/10 across the seven all-round axes in our Tacoma tire research set, ranking #11 of 50 overall. - Strongest axes: road comfort 8/10, wet grip 8/10. - Weakest axis: mud 4/10. - 3PMSF (severe snow service) rated; 7th of 18 all-terrains in the set. - Listed in 10 Tacoma sizes on 16-inch, 17-inch, and 18-inch wheels. - The Cooper Discoverer AT3 4S/LT's row rests on 3 cited sources: tacoma owner setups, tacoma category guidance, and manufacturer product. ## How These Scores Are Made Scores here are an editorial synthesis of published manufacturer specifications, tire-industry write-ups, retailer fitment data, and Tacoma-owner reports — Taco Tires runs no instrumented testing of its own. [How we score tires](https://tacotires.com/about#how-we-score). ## Our verdict on the Cooper Discoverer AT3 4S/LT The Cooper Discoverer AT3 4S/LT reads as a pavement-first all-terrain in this dataset: quiet, settled highway manners tops its profile at 8/10 with wet-road grip at 8/10, for a 7.6/10 blend across the seven all-round axes. Nothing in the profile collapses: the lowest mark, mud clearing at 4/10, is 4 points off the top and does not even feed the blend, and the dataset flags it when you need maximum mud traction. It carries the 3PMSF severe-snow symbol, sits in the mid-priced bracket at #11 of 50 overall and 7th of 18 all-terrains, is catalogued in 10 Tacoma sizes on 16- through 18-inch wheels, and rests on 3 cited sources. Its lead use cases are all-weather daily driving and moderate trail use, one place behind the Cooper Discoverer ATP II in our ranking. ## The ten-axis score profile Every model in the research set is rated 0-10 on the same ten axes. For the Cooper Discoverer AT3 4S/LT the profile runs from 8/10 on road comfort down to 4/10 on mud; the 7.6/10 headline figure is the average of the seven axes marked below as feeding the blend. | Axis | What it covers | Score | In blend | | --- | --- | --- | --- | | Road comfort | pavement ride quality and noise | 8/10 | Yes | | Wet grip | traction on wet pavement | 8/10 | Yes | | Snow | packed snow and winter road traction | 8/10 | Yes | | Trail | dirt, gravel, and rock trail traction | 6/10 | Yes | | Mud | deep mud traction and self-cleaning | 4/10 | No | | Durability | puncture and sidewall resistance | 7/10 | Yes | | Tread life | expected mileage before replacement | 8/10 | Yes | | Efficiency | weight and rolling resistance | 7/10 | No | | Looks | how aggressive the tread and sidewall read | 5/10 | No | | Value | what the tire delivers per dollar | 8/10 | Yes | 7 of the ten axes feed the blended number (road comfort, wet grip, snow, trail, durability, tread life, and value); mud, efficiency, and looks are shown for the Cooper Discoverer AT3 4S/LT but sit outside it, which is why a mud or looks score can run well above or below the headline. ## Who the Cooper Discoverer AT3 4S/LT is for ### Best for The research dataset tags the Cooper Discoverer AT3 4S/LT for the uses below; the number after each one is the axis in its own profile that backs the tag. - All-weather daily driving — wet grip 8/10. - Moderate trail use — trail 6/10. - Snow driving — snow 8/10. - Value per dollar — value 8/10. ### Avoid if The same dataset flags where the Cooper Discoverer AT3 4S/LT is the wrong pick, again with the axis behind each call. - You need maximum mud traction — mud 4/10. - You want the most aggressive look available — looks 5/10. ## Tacoma sizes the Cooper Discoverer AT3 4S/LT comes in The catalog behind this dataset records the Cooper Discoverer AT3 4S/LT in 10 sizes that fit common Tacoma wheel diameters, spanning 16-inch, 17-inch, and 18-inch wheels. Of those, 9 have a Tacoma fitment page on this site, linked below. - [245/75R16](https://tacotires.com/tacoma/tire-size/245-75r16) — 16-inch wheel - [265/70R16](https://tacotires.com/tacoma/tire-size/265-70r16) — 16-inch wheel - [265/75R16](https://tacotires.com/tacoma/tire-size/265-75r16) — 16-inch wheel - [245/70R17](https://tacotires.com/tacoma/tire-size/245-70r17) — 17-inch wheel - [265/65R17](https://tacotires.com/tacoma/tire-size/265-65r17) — 17-inch wheel - [265/70R17](https://tacotires.com/tacoma/tire-size/265-70r17) — 17-inch wheel - [275/70R17](https://tacotires.com/tacoma/tire-size/275-70r17) — 17-inch wheel - [285/70R17](https://tacotires.com/tacoma/tire-size/285-70r17) — 17-inch wheel - [265/65R18](https://tacotires.com/tacoma/tire-size/265-65r18) — 18-inch wheel - 275/65R18 — 18-inch wheel, no fitment page on this site yet Those 10 entries are the dataset's own availability list for the Cooper Discoverer AT3 4S/LT, not a live retailer feed — a model with a thin catalog gets a short list here rather than a padded one. What actually clears on your truck still depends on wheel width, offset, and how much trimming you will accept, so check the size against your generation before you buy. ## Sources behind the Cooper Discoverer AT3 4S/LT's scores The Cooper Discoverer AT3 4S/LT's row rests on 3 of the 83 cited documents behind this research set — tacoma owner setups, tacoma category guidance, and manufacturer product. Each is listed with the date it was read. - [Trailtacoma AT Setups](https://trailtacoma.com/3rd-gen/all-terrain-tire-choices-tacoma/) — trailtacoma.com, tacoma owner setups, read 2026-07-03. TrailTacoma's 3rd-gen all-terrain setup roundups include owner setups with Falken Wildpeak A/T3W, Cooper Discoverer AT3, BFGoodrich KO2, Mickey Thompson Baja Boss, Toyo Open Country A/T, and Nitto Ridge Grappler-style use cases. - [Trailtacoma AT Vs MT](https://trailtacoma.com/2024-tacoma/all-terrain-vs-mud-terrain-tires-what-you-should-know/) — trailtacoma.com, tacoma category guidance, read 2026-07-03. TrailTacoma explains the tradeoffs among H/T, A/T, R/T, and M/T tires for Tacoma owners and flags BFG, Cooper, Nitto, and Yokohama as common big-name choices. - [Cooper At3 Xlt](https://www.coopertire.com/en_US/tires/discoverer-at3-xlt/24486.html) — coopertire.com, manufacturer product, read 2026-07-03. Cooper product page for Discoverer AT3 XLT. ## FAQ ### Is the Cooper Discoverer AT3 4S/LT a good tire for a Toyota Tacoma? In our editorial synthesis the Cooper Discoverer AT3 4S/LT blends to 7.6/10 across the seven all-round axes, which places it 7th of 18 all-terrains and #11 of 50 in the whole research set. Its case rests on quiet, settled highway manners (8/10) and wet-road grip (8/10), so it suits all-weather daily driving, moderate trail use, and snow driving. ### What Tacoma tire sizes does the Cooper Discoverer AT3 4S/LT come in? The research catalog records the Cooper Discoverer AT3 4S/LT as offered in 10 sizes that fit common Tacoma wheel diameters: 245/75R16, 265/70R16, 265/75R16, 245/70R17, 265/65R17, 265/70R17, 275/70R17, 285/70R17, 265/65R18, and 275/65R18. That is the dataset's own availability list rather than a live retailer feed, so confirm the exact size and load range with the seller before ordering. ### Is the Cooper Discoverer AT3 4S/LT rated for snow? The Cooper Discoverer AT3 4S/LT carries the 3PMSF severe-snow-service symbol, and our synthesis puts its snow axis at 8/10. That combination is what qualifies it as a year-round tire in states with severe-snow tire rules, though a dedicated winter tire still out-grips any all-season or all-terrain on ice. ### What are the downsides of the Cooper Discoverer AT3 4S/LT? The weakest marks in the Cooper Discoverer AT3 4S/LT's profile are mud clearing at 4/10 and visual aggression at 5/10. The dataset flags it as the wrong choice when you need maximum mud traction and you want the most aggressive look available. Those judgements come from the 3 cited sources listed on this page, not from anything measured here. ## Related - [Best all-terrains for the Tacoma](https://tacotires.com/guides/best-all-terrain-tires-for-tacoma) - [All-terrain vs mud-terrain on a Tacoma](https://tacotires.com/guides/all-terrain-vs-mud-terrain-tires-tacoma) - [Winter and snow tires for a Tacoma](https://tacotires.com/guides/tacoma-winter-snow-tires) - [All Tacoma tire reviews](https://tacotires.com/tires) - [Match a tire to my build](https://tacotires.com/find-my-tire-size) - [Every Tacoma tire size](https://tacotires.com/tacoma/tire-size) - [Compare two sizes](https://tacotires.com/tire-calculator)