21-Inch Troy-Bilt Push Mower Blades: Aftermarket Fits Compared

Best for
TB130 owners wanting full specs

The Grasscool 942-0741A Troy Bilt 21 inch mulching blade is a third-party replacement with the most thorough fit section of the group. It lists 942-0741, 942-0741A, 742-0741 and 742-0741A among the OEM numbers it replaces, and names a long run of Troy-Bilt models including the TB105 through TB160 XP, TB200 series, TB270 ES, TB449E and the Tru-Cut, Tuff-Cut and Pro-Cut lines. It is aimed at walk-behind, push and self-propelled mowers with 21-inch decks from 1995 on.

It is a 3-in-1 blade for mulching, bagging and side discharge, made from 40MnB steel with a 1-1/8 inch lift. Grasscool says the airflow reduces clogging and helps in damp grass, and that the lift helps pull seed heads off weeds. Listed dimensions are 20-7/8 inches long, 2-1/4 inches wide and 9/64 inch thick with a bow-tie center hole. Weight is 1.75 pounds.

This is a single blade, so you pay per blade, and the stated length is slightly under 21 inches, which is normal for a 21-inch deck blade. It suits TB130 owners who want the most detail up front. It gives way to multi-packs if you like to swap blades mid-season.

• Replaces 942-0741A and 742-0741A
• 3-in-1: mulch, bag, side discharge
• 40MnB steel, 1-1/8 inch lift
• Bow-tie center hole

Best for
Owners of older Tru-Cut or Tuff-Cut decks

The ACEBRI Mower Blades 21 inch listing is a third-party blade that names 942-0741 and 942-0741A among its replacements, and lists Troy-Bilt Tru-Cut 100 and 110, Tuff-Cut 200 through 230, Pro-Cut 300 through 320 and TB105 through TB130 XP. That model coverage makes it worth a look if you own one of the older Tru-Cut or Tuff-Cut machines.

The specs need a close read. ACEBRI lists a length of 21 inches, width of 2.38 inches, thickness of 0.128 inches and a 0.6875-inch center hole, with the blade material given as iron. The other blades here describe a bow-tie center hole and steel construction, so compare against your old blade before ordering. The item weight is 3.54 pounds, which the listing does not explain for a single blade, and the pack count is not stated.

It suits owners who can confirm the hole pattern matches their spindle. It gives way to the Grasscool or UDC Parts blades if you want a clearly listed bow-tie hole. If you are also hunting other replacement parts, see our guide to Troy-Bilt lawn mower parts.

Best for
Spare blade on the shelf

The UDC Parts 942-0741A Troy Bilt 21 blade comes as a 2-pack, which is the practical way to handle blade care: mount one, keep the other sharp and ready. It replaces 942-0741A, 742-0741, 742-0741A and a long list of related numbers, and names Troy-Bilt models from the TB100 through TB320XP, the TB380 and TB400-series XP models, the TB449E and the Tru-Cut, Tuff-Cut and Pro-Cut lines.

Dimensions are listed in detail: 21 inches long measured diagonally, 2-1/4 inches wide, a bow-tie center hole, 5/16-inch side holes spaced 2-1/2 inches center to center, a 1-7/64 inch air lift and a 6-7/64 inch cutting edge. Each blade is pre-sharpened and has a safety coating, and UDC Parts offers one year of product support for manufacturing defects.

The listing says high-strength steel without naming a grade. It suits anyone who wants a spare for when the first blade needs sharpening. It gives way to the 8TEN 4-pack for heavy mowing schedules.

Best for
Mulching on a budget-minded single blade

The 21″ 942-0741A Mulching Mower Blade is sold by Bularie, another third-party maker. It replaces 942-0741A, 742-0741A, 942-0741, 742-0741 and related numbers, and lists Troy-Bilt TB105 to TB160XP series plus Tru-Cut and Tuff-Cut models, with the TB130 named in the title.

It uses a 3-in-1 aerodynamic mulching design that supports bagging and side discharge. Bularie says the high-carbon steel is heat treated and dynamic balance tested for reduced vibration, which is the kind of detail that matters when you want a smooth, quick mow. The description lists 21 inches long, 2-1/4 inches wide, 0.126 inch thick, a bow-tie center hole and 5/16-inch outer holes 2-1/2 inches apart. It weighs 1.55 pounds and ships as a single blade.

It suits owners who want a mulching blade with stated balance testing. It gives way to multi-packs if you want spares, and Bularie itself advises checking your OEM number, deck size and center hole before buying.

Best for
Rotating sharp blades all season

The 8TEN LawnRAZOR Mower Blade for Cub set is a 4-pack of mulching blades sold for 21-inch walk-behinds, including Troy-Bilt 21-inch models from 1995 and newer. The listing specifically names the Troy-Bilt TB110, TB130, TB220 and TB230, and it replaces 942-0741, 942-0741A, 742-0741 and 742-0741A among other numbers.

The description lists a 21-inch length, 2-1/8 inch width, 0.126 inch thickness and a center hole of 1 by 3/4 inch. That width is slightly narrower than the 2-1/4 inches listed by several others, and the center hole description differs from the bow-tie wording elsewhere, so compare with your current blade. 8TEN backs the blades with an 810-day limited warranty, the longest stated here. The pack weighs 6.3 pounds.

This set suits people who mow often and want to rotate sharp blades through the season. It gives way to single blades if you only need one replacement.

• Four mulching blades in the pack
• Names TB110, TB130, TB220 and TB230
• 810-day limited warranty

Best for
Shoppers wanting a known blade maker

The Oregon 21 Inch Lawn Mower Blade, model B-21-1, is a single mulching blade from a long-running blade maker. Its fit section is clear on dimensions: 21-inch length for a 21-inch deck, bow-tie center hole, 5/16-inch outer holes, 2-1/2 inch center-to-center spacing and 2.25-inch width. Oregon tells buyers to double-check the mower manual to verify fit.

The model list focuses on other 21-inch walk-behinds and names only a couple of Troy-Bilt model codes (11A-426A711 and 12A-446A711) rather than TB model names, so it takes a bit more checking than the others. It is made from alloy steel and designed to cut and recut clippings into fine mulch. The item highlight calls it a Gator mulching blade.

It suits owners who want a well-established brand and can confirm the dimensions match. It gives way to the Grasscool or UDC Parts blades if you want your TB model named directly. If you are thinking about a new mower instead, our look at a cordless 21-inch push mower covers that route.