255/80R17 on a Toyota Tacoma.

255/80R17 is a 17-inch size, so the generations it can go on without new wheels are the ones our size families run on 17-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 255/80R17 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.

Every tier above is modeled output of our own fitment rule-set applied to 255/80R17, not an install anyone here measured: wheel offset, alignment, mud flaps, and the tire model's real moulded width all move where 255/80R17 starts rubbing. Where the two sources behind those tiers disagree, the number you see is the conservative one.

These are the 4 sizes closest to 255/80R17 in overall diameter that also run 17-inch wheels, so every swap in the table is a tire change rather than a wheel change. The set runs from 285/70R17 at 32.7 in to 295/70R17 at 33.3 in, and none of them is a factory Tacoma size. Speedometer error is calculated against 255/80R17 at 33.1 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 295/70R17 in place of 255/80R17 puts true speed at 60.4 mph when the speedometer still reads 60. Every alternative here stays inside the 3 percent window our speedometer calculator treats as the safe band against 255/80R17. Width moves on its own axis: the widest of them, 33x12.5R17, is 2.5 in wider than 255/80R17, and section width is what reaches the fender liner and the upper control arm first.

Our tire research dataset lists 13 models offered in 255/80R17. 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 rugged-terrain (hybrid) Goodyear Wrangler DuraTrac RT 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 255/80R17 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.