What Size Tire Is an 11×4.00-5 and What Does It Fit?

For the full breakdown, see our best 11×4.00-5 Tire guide.

The three numbers are tire diameter, tire width, and rim diameter, in that order.

Breaking Down the 11×4.00-5 Numbers

An 11×4.00-5 breaks into a nominal 11-inch outside diameter, a 4-inch section width, and a 5-inch rim — so it does not mount on an 11-inch wheel.

Real measured dimensions drift slightly from the nominal numbers, because tire makers round. Any of those will sit correctly on a 5-inch rim.

What actually varies is the tire’s construction. Some 11×4.00-5 tires are pneumatic and air-filled; others are flat-free solid rubber that never goes soft. Pneumatic versions cushion the ride and need occasional air pressure checks. Flat-free versions trade some ride comfort for never leaving you with a flat mid-mow. Marathon Industries’ flat-free 11×4.00-5 is built for exactly that no-flat service.

What Equipment Does an 11×4.00-5 Fit?

This is a front tire for lawn and garden equipment — zero-turn riding mowers, walk-behind and riding lawn mowers, and some garden tractors.

Front caster wheels on zero-turn mowers are the most frequent home for the size, which is why it turns up so often in mower parts listings. It is not a drive tire, and it is not built for road or trailer service.

Matching A Wheel Assembly Before You Buy

Buying by tire size alone gets people burned, because the tire can be correct while the wheel assembly is wrong. Hub length, hub type, axle bore, and bushing diameter all have to match your machine, and listings repeatedly tell buyers to measure the existing assembly first.

Work through this order before you order anything:

1. Measure the old tire’s outside diameter and width.
2. Measure the hub length across the center of the wheel.
3. Measure the axle bore and note the bushing size — 3/4 inch, 5/8 inch, and 1/2 inch are the common options.
4. Confirm the rim is a 5-inch rim, not a 6-inch.
5. Check the fitment exclusions in the listing, not just the fitment list.

That fifth step matters more than it looks. A tire can carry the right size stamp and still be excluded by the maker for a specific model. When you have your measurements in hand and want a shortlist, these tested 11×4.00-5 tire picks cover the common hub and bushing combinations.

Pressure and load ratings are worth a glance on pneumatic versions. Marathon Industries publishes its own load and pressure data for its flat-free and pneumatic lawn tires, so check the spec line rather than assuming every 11×4.00-5 carries the same rating.

Frequently Asked Questions

Can I put an 11×4.00-5 tire on a 6-inch rim?

No. The final number in the size is rim diameter, so an 11×4.00-5 needs a 5-inch rim. A 6-inch rim calls for a size ending in -6, such as 11×4.00-6. Mounting the wrong rim bead will not seat properly and will not hold air safely on a pneumatic tire.

Is a flat-free 11×4.00-5 as good as a pneumatic one?

They solve different problems. Flat-free tires never go soft and need no air pressure checks, which suits rough yards and thorny ground. Pneumatic tires ride softer and cost less, but they need periodic inflation. Either works as a front caster tire on a zero-turn mower.

How much weight can an 11×4.00-5 carry?

Current listings put load ratings between 300 and 350 pounds, varying by tire and assembly. That covers front caster duty on most mowers and garden tractors. It is not a drive-axle tire, so do not move it to a powered wheel position to handle more load.