Invovic FM591

A trailer-axle radial for van, reefer and flatbed work, in three sizes — 11R22.5, 11R24.5 and 295/75R22.5 — every one a 16-ply Load Range H casing. It runs behind the tractor on regional freight, drop-yard shuttles and tight-dock loads — the axles that carry weight and take scrub, and are never asked to pull or steer.

Depth is the argument for this tire. It carries 19/32 inch of tread in 11R22.5 and 11R24.5 and 20/32 in 295/75R22.5. The line-haul fuel trailer tires we quote — Michelin X Line Energy T2, Bridgestone R123 Ecopia, Firestone FT492 — run 11/32; the Yokohama BluEarth 109L runs 12/32; Double Coin FT115 runs 13/32; the deep-tread specialist in the class, the Goodyear Endurance RST, runs 18/32. That extra rubber is removal miles and scrub tolerance: more to give up in the yard and at the dock before the tire comes off the trailer. What you pay for it is rolling resistance — a deep tread is not a fuel tread, and Invovic publishes no rolling-resistance figure either way, so we make no fuel claim in either direction.

The tread is five ribs split by four wide circumferential grooves that push water out from under the footprint. S-shaped sipes cut across the ribs to add biting edges on a wet road and to let the rubber shed heat. Decoupling grooves at the shoulder let the outside rib flex a little on its own. Stone ejectors sit in the four main grooves to kick rocks out before they drill toward the belts. Every size is 16-ply Load Range H at 120 psi — there is no 14-ply Load Range G build — rated 6,005 lb dual in 11R22.5 and 295/75R22.5 and 6,610 lb dual in 11R24.5.

What it is not. It is not a steer tire. Invovic publishes no steer or all-position rating for this pattern, and the steer axle is the one place a tire failure is not survivable, so we quote it for trailer axles only — do not let a shop mount it up front. It is not a drive tire either; ribs do not dig. It is not EPA SmartWay verified: Invovic does not appear on EPA’s verified low-rolling-resistance list, so it cannot go under a 53-foot box trailer operating in California under the state’s tractor-trailer greenhouse-gas rule. It is not made in 285/75R24.5, so a trailer running that size takes a different brand — say the word and we will quote one. And if you run a casing program, look elsewhere: there is no published Invovic casing warranty and no Invovic retread program, so plan on this casing having one life until your retreader tells you otherwise.

The benchmark for the same duty cycle is the Goodyear Endurance RST — an 18/32 inch regional and spread-axle trailer tire, marked by Goodyear for trailer use only, listed by Goodyear in all four sizes we quote. What the RST documents, the FM591 has nothing to answer with: a published casing warranty that covers the casing, not the tread, good for unlimited retreads for seven years from the casing DOT date when the retreading is done by a Goodyear Authorized Retreader, and for the first retread only across those same seven years when it is not; a named retread pattern to send that casing back as, Goodyear UniCircle Endurance RST; and a published dimensional table you can hand a fleet auditor. Against the RST you give up all three, and gain 1/32 to 2/32 of tread. Load capacity does not separate them: in the three sizes both are built in, each is 16-ply Load Range H with the same service description. Neither tire is EPA SmartWay verified, so if fuel economy is the target, the verified trailer tires we quote are the Michelin X Line Energy T2, Bridgestone R123 Ecopia, Firestone FT492, Yokohama BluEarth 109L and Double Coin FT115. What the FM591 gives back is the same trailer-axle job, factory direct, from a plant we import from with no distributor in between. Put both on one quote and compare the two all-in delivered numbers.