The all-terrain in the companion fitment guide is the right tire for most Tacomas. A mud-terrain is for the truck that genuinely lives in mud, deep sand, and on wet rock, where the aggressive tread finally bites where an AT washes out. This card weighs the gain against the very real penalties — in numbers, not vibes.
Wide tread voids and big shoulder lugs clear mud and claw loose rock and sand far better than an all-terrain, and the chunkier blocks find edges on wet granite that an AT skates over. On a moderate-to-hard Tacoma build on 33s, that traction is what cleans the obstacle instead of digging a hole. Self-cleaning tread also keeps biting lap after lap in slop, and the heavier sidewall construction shrugs off the rock cuts that end an AT's day. Aired down to trail pressure, an MT's soft, open shoulder wraps an edge an all-terrain slides off.
Factory TRD Off-Road rubber is 265/70R16 — about 30.6 inches tall. The mud-terrain step-ups that make sense:
Everything runs on the 6x139.7 pattern with the 106.1 mm hub bore. Common aftermarket fitment is 17x8 with 0 to -12 mm offset; deeper negative offset looks the part but adds scrub radius, rubbing, and wheel-bearing load. Details in the wheels guide.
In 285/70R17, the field sorts out like this. The BFGoodrich KM3 ($400-440, ~56 lb in load range D) has the best rock compound and sidewall of the group. The Nitto Trail Grappler ($410-450, ~67 lb in load E) is the quietest MT made — and the heaviest. The Falken Wildpeak M/T01 ($340-380, ~62 lb) is the value pick and gives up little in mud. The Toyo Open Country M/T ($430-470) wears longest of any MT if the budget reaches.
Load range matters more than most buyers think: skip load E unless the truck carries heavy armor and overland weight full-time. A C or D carries a Tacoma fine, rides noticeably better on IFS, and saves 5-10 lb per corner. And note what no MT here offers — a Three-Peak Mountain Snowflake rating. The M+S stamp on the sidewall is mud-and-snow marketing, not a winter certification; if real winter driving is on the menu, that argues for the AT.
Five KM3s in 285/70R17 run $2,000-2,200 before $100-150 of mounting and balancing. Tread life is 35,000-45,000 miles against 50,000-65,000 for a comparable all-terrain — over 100,000 miles of ownership that is an entire extra set of tires. Expect a real-world 1-2 mpg penalty and a permanent highway drone. The extra ~10 lb per corner is unsprung weight the 278 hp 3.5L feels everywhere — acceleration, braking, and steering response — and the 2nd gen 4.0L feels it more. None of this is a reason not to buy an MT; it is the price of the traction, and you should pay it knowingly.
Gearing first: a 3rd gen automatic on the factory 3.909 with 33s hunts gears and lugs the torque converter — 4.88s restore factory feel, roughly $1,800-2,600 for both diffs installed via the regear guide. The 4.30-geared trucks can wait until the next tire size. Second, the spare: a 33 will not winch back into the stock under-bed carrier without a fight, so plan a bed mount or accept a slow-motion wrestling match on the trail. Run a matched five-tire rotation — mandatory behind a rear locker, smart everywhere else. Air down to 15-18 psi on the trail, torque lugs to 83 lb-ft, re-torque at 50 miles, and pay for a road-force balance; heavy MTs that are merely spin-balanced are where "my Tacoma shakes at 65" threads come from.
Mud-terrains fail in their own ways. Chipping and chunking — small blocks tearing out of the tread — shows up fast if a soft-compound MT like the KM3 does long, hot highway pulls at full pressure; keep highway pressure at the door-jamb number, not the sidewall max. Rotate every 5,000 miles without fail; MTs that skip rotations cup, and a cupped MT howls even by MT standards. Check aired-down bead seating after hard side-loading — a 33 at 15 psi on a stock-width wheel can push the bead, and a slow leak that appears after a wheeling weekend is usually that. And re-check lug torque after the first trail trip, not only after mounting.
Pick the mud-terrain only if mud, sand, and wet rock are your normal — then live with the noise, the fuel bill, and the faster wear. For mixed daily and trail use the all-terrain is the smarter tire. Whichever you choose: size it to your lift, regear to match, carry a matched full-size spare, and road-force balance it. That is the whole recipe.
| Part | Vendor | Est. price |
|---|---|---|
| Mud-terrain tires (set of 5, 33 in class) | BFGoodrich KM3 / Nitto Trail Grappler / Falken Wildpeak M/T01 / Toyo Open Country M/T | ~$2000 |
Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.
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