What 275/70R18 measures, which Tacoma trims ship it from the factory, and what our fitment model says it takes to run it by generation.
Will it fit
No Tacoma ships 275/70R18 from the factory in our 2017-2026 fitment data — it is an upgrade size, filed in our candidate set as trail fit: a taller 18-inch option that stays narrower than many 285 choices.
No generation on 18-inch wheels clears 275/70R18 at stock height in our model — it needs more than any tier our matrix models on a 2nd gen Tacoma; a 4-6 in lift on a 3rd gen Tacoma; a leveling kit (1-2 in) on a 4th gen Tacoma.
275/70R18 measures 33.2 in tall and 10.8 in wide, with 7.6 in of sidewall on an 18-inch wheel and about 608 revolutions per mile.
Our per-size candidate table asks for Level / 1-2 in with minor changes before fitting 275/70R18; the tiers on this page publish whichever of that and the generation ceiling is stricter.
No Tacoma in our 2017-2026 fitment data leaves the factory on 275/70R18. It reaches Tacomas as an aftermarket choice, which is why this page leads with what it takes to fit rather than with which trim wears it. Our candidate set files 275/70R18 as trail fit: a taller 18-inch option that stays narrower than many 285 choices.
The nearest factory size on the same 18-inch wheel is 265/70R18 at 32.6 in, which our data records on 4 Tacoma rows (TRD Off-Road i-FORCE MAX (2026), Trailhunter (2026), TRD Pro (2026), and TRD Off-Road (2024)). Against it 275/70R18 is 0.6 in taller and 0.4 in wider — the gap the fit tiers below are really about.
Will 275/70R18 fit a Tacoma?
275/70R18 is an 18-inch size, so the generations it can go on without new wheels are the ones our size families run on 18-inch rims: 2nd gen Tacoma (2005-2015), 3rd gen Tacoma (2016-2023), and 4th gen Tacoma (2024-2026). Two sources in this repo have an opinion about 275/70R18 on each of them — the per-generation clearance matrix behind our max-tire estimator, and the per-size candidate table behind the recommender — and where they disagree, the stricter of the two is what you read below.
2nd gen Tacoma (2005-2015)
Past every tier our matrix models for a 2nd gen Tacoma
Setup
Modeled ceiling
275/70R18
Stock height
265/70R16 (~30.6 in)
Over the ceiling
Leveling kit (1-2 in)
265/75R16 (~31.6 in)
Over the ceiling
3 in suspension lift
285/75R16 (33s, about 32.8 in)
Over the ceiling
Our fitment matrix does not model a 2nd gen Tacoma that clears 275/70R18. Even at 3 in suspension lift it tops out at 285/75R16 (33s, about 32.8 in), and 275/70R18 stands 33.2 in — 0.4 in taller than that tier's ceiling. Read it as out of range for this generation rather than a build with a longer parts list.
The candidate table is the looser of the two for 275/70R18: it clears the size at Level / 1-2 in with minor changes, which the 2nd gen Tacoma ceiling above does not support. That table rates a size on its own terms — the rule-set's own generation-agnostic description of the size reads "A taller 18-inch option that stays narrower than many 285 choices." — with no generation column to narrow it, so where the two disagree this page publishes the matrix tier.
One sourcing caveat for the 2nd gen Tacoma: our per-year fitment rows start at 2017, so nothing in this repo assigns 275/70R18 to a 2005-2015 trim. The 18-inch family we list for that span is a long-running community-documented pattern, not a verified per-year spec, and the ceilings above are the estimator's rule-set for the generation rather than measurements from a 2005-2015 truck.
275/70R18 at 33.2 in is past the modeled stock-height ceiling for a 3rd gen Tacoma (265/70R17 (~31.6 in)), so the conservative read this page publishes is a 4-6 in lift. At that tier the matrix models 35x12.50R17 (35s, about 35.0 in), and the clearance work it lists is cab mount chop / relocation, pinch weld, high fender-liner trim, and firewall and front-bumper trimming, with gearing flagged at 4.88-5.29.
The same disagreement as on the 2nd gen Tacoma applies to 275/70R18 here: the candidate table clears it at Level / 1-2 in with minor changes, the 3rd gen Tacoma ceiling does not reach that far, and the tier above is the matrix's conservative one.
275/70R18 at 33.2 in is past the modeled stock-height ceiling for a 4th gen Tacoma (285/70R17 (33s, about 32.7 in)), so the conservative read this page publishes is a leveling kit (1-2 in). At that tier the matrix models 285/75R17 (skinny 34s, about 34.0 in), and the clearance work it lists is crash-plate removal (2 bolts, reversible) and light fender-liner trim at full lock, with gearing flagged at 4.88 if sluggish.
Both sources land in the same place for 275/70R18 on a 4th gen Tacoma: the candidate table files it as trail fit at Level / 1-2 in with minor changes — the rule-set's own description of the size reads "A taller 18-inch option that stays narrower than many 285 choices." — and the matrix agrees at leveling kit (1-2 in). The matrix note at that tier reads: Crash-plate removal replaces the permanent 3rd-gen cab mount chop.
Every tier above is modeled output of our own fitment rule-set applied to 275/70R18, not an install anyone here measured: wheel offset, alignment, mud flaps, and the tire model's real moulded width all move where 275/70R18 starts rubbing. Where the two sources behind those tiers disagree, the number you see is the conservative one.
275/70R18 vs the nearest Tacoma sizes
These are the 4 sizes closest to 275/70R18 in overall diameter that also run 18-inch wheels, so every swap in the table is a tire change rather than a wheel change. The set runs from 265/65R18 at 31.6 in to 285/70R18 at 33.7 in, and 265/65R18 and 265/70R18 are factory Tacoma sizes. Speedometer error is calculated against 275/70R18 at 33.2 in — the size the truck would be calibrated for if it wore this page's tire.
That last column is the error you would carry after the swap, before any recalibration: fitting 285/70R18 in place of 275/70R18 puts true speed at 61.0 mph when the speedometer still reads 60. 265/65R18 sits outside the 3 percent window our speedometer calculator treats as the safe band against 275/70R18, so that one is recalibration territory. Width moves on its own axis: the widest of them, 285/70R18, is 0.4 in wider than 275/70R18, and section width is what reaches the fender liner and the upper control arm first.
Top-ranked 275/70R18 tires for a Tacoma
Our tire research dataset lists 33 models offered in 275/70R18. No Tacoma ships the size, so the shortlist leads with the category our candidate table's trail fit rating points at rather than with a factory fitment. Below are the 3 best-ranked all-terrain models offered in it, plus the mild all-terrain Yokohama Geolandar A/T G015 for contrast — built for a different job, so it scores on different axes.
Scores are a 0-10 editorial synthesis of published reviews, manufacturer specifications, and retailer fitment data — not tires we tested ourselves. Which models are offered in 275/70R18 is the research dataset's own size catalog, which is why a thinly-catalogued size returns a short list here rather than a padded one. The order above is that dataset's editorial rank; the 0-10 badge is the blended score behind it, so a higher badge on a lower-ranked model is the two measures disagreeing rather than a mistake. How we source and score.
Not in our fitment model: a 2nd gen Tacoma needs more than any tier our matrix models, a 3rd gen Tacoma needs a 4-6 in lift, and a 4th gen Tacoma needs a leveling kit (1-2 in). Our candidate table and our generation matrix disagree about 275/70R18 on a 2nd gen Tacoma and a 3rd gen Tacoma, and the answer above is the conservative side of that disagreement. Both are modeled estimates rather than installs we measured, and lower-offset wheels or spacers can undo any of them.
275/70R18 works out to 33.2 in of overall diameter and 10.8 in of section width, with 7.6 in of sidewall over an 18-inch wheel. The math is the standard one: 275 mm of section width at a 70 percent aspect ratio gives the sidewall, and overall diameter is the 18-inch rim plus twice that sidewall. At that diameter the tire turns about 608 revolutions per mile, and a mounted tire can measure a little off these numbers depending on the model and the rim width it is fitted to.
275/70R18 is 0.6 in taller and 0.4 in wider than 265/70R18: 33.2 in against 32.6 in of overall diameter, and 10.8 in against 10.4 in of section width. In revolutions per mile that is 608 against 619, so a speedometer calibrated for 275/70R18 would read 59.0 mph of true speed at an indicated 60 once 265/70R18 was fitted. Both sit on 18-inch wheels, so moving between them is a tire purchase rather than a wheel purchase.
No. Across the 2017-2026 model years our fitment data covers, no Tacoma trim row leaves the factory on 275/70R18; our candidate set carries it as trail fit instead. That matters for two practical reasons: there is no door-placard pressure figure written for 275/70R18 on a Tacoma, and the speedometer in any truck you fit it to was calibrated for a different diameter than 33.2 in.
