Caltric 42" Deck Spindle Blade Kit Compatible with John Deere D100 D105 D110 D120 D125 D130 E100 E110 E120 E130 LA100 LA105 LA110 LA115 LA120 LA125 LA135 S100 S110 / Qty 2

What It Is

This is a two-piece aftermarket blade spindle kit for 42-inch cutting decks on select John Deere lawn tractors. Each kit includes the spindle housing, bearing, pulley, and blade—ready to bolt on as a direct replacement for a worn or damaged original assembly.

Fitment & Compatibility

Check your deck model first. This kit fits only 42-inch Edge, Edge X, and standard 42-inch decks found on the listed D100, E100, LA100, and S100 series tractors (e.g., D105, E110, LA125). It does not fit 48-inch or 54-inch decks.

OEM cross-reference: Replaces John Deere parts GY20785, GY21131, and GY21130. If your original spindle has a different number, measure the bolt pattern (typically 3 holes on 3.75-inch centers) and spindle shaft diameter (usually 5/8-inch). The pulley diameter is 4.25 inches.

Aftermarket note: Caltric is a third-party brand. While it matches OEM dimensions, verify that your deck’s blade engagement cable and belt alignment don’t require a specific pulley offset. Some late-model decks have subtle differences.

Key Things to Know

• Installation difficulty: Moderate. You’ll need a jack to lift the mower, a socket set, and a torque wrench (spindle bolts: 30-35 ft-lbs). Allow 1-2 hours for both spindles.
• Bearing quality: Caltric uses sealed ball bearings. They’re adequate for residential use but may not last as long as OEM bearings under heavy commercial mowing.
• Blade included: Each kit comes with a 16.5-inch blade. If you prefer high-lift or mulching blades, you’ll need to buy those separately.
• Common gotcha: The pulley may have a slightly different finish (painted vs. bare metal) than your original. This doesn’t affect function but can look mismatched.

Should You Buy It

If you have a 42-inch Deere in the D100/E100/LA100/S100 family and need a quick, bolt-on spindle replacement for a residential lawn, this Caltric kit is a solid value. It’s not built for heavy commercial use, but for the price and included blades, it beats sourcing individual OEM parts.