ExactBladeFit BLADE & BELT SPEC DB
← Back to Master Cross-Reference Directory • Category: John Deere 48" Decks • Nominal Spec: GX21784 / GX21833
John Deere 48" Decks

John Deere D140 / D155 / D160 / LA145 / E140 / S140 48" 3-Blade Deck — 7-Point Star Blade GX21784 & 1/2" x 141.125" Kevlar Belt GX21833

Exact OEM part-number, blade center-hole star pattern and Kevlar belt length cross-reference for John Deere D140 / D155 / D160 / LA145 / E140 / S140 48" 3-Blade Deck.

⚠ CRITICAL FIT RULE: Match the spindle center-hole pattern (count the star points) and the exact fractional belt length from your model/deck tag before ordering. Always confirm against your owner's manual.
Verified Reddit Fit Complaint: r/lawncare — wrong star pattern / belt length threads

Side-by-Side Exact Caliper & RFID Compatibility Matrix

Measured to 1/8" (0.125") Tolerance
OEM Brand & Model Exact Caliper Size (In) Spindle Hole / Cord Spec Spindle / Belt Trap OEM Price Verified Multi-Pack Match Direct Spec Links
John Deere D140 / D155 / D160
Group: JD 48" 3-Blade Deck
 Blade 16.0" | Belt 0.50" x 141.125"
16" | 1/2" x 141-1/8"
 7-Pt Star / Aramid Kevlar 42" GX20072 belt is ~37" too short $31.99 x3 / $69.99 Oregon Gator G3 3-Pack + Kevlar GX21833
$56.99 / $36.95 Save 43%
Verify Exact Fit → Amazon
John Deere LA145
Group: JD 48" 3-Blade Deck
 Blade 16.0"
16"
 7-Pt Star / Aramid Kevlar Hi-lift vs mulching blades differ — both 7-star $31.99 USA Mower Blades GX21784 3-Pack
$49.95 Save 48%
Verify Exact Fit → Amazon
John Deere E140 / S140
Group: JD 48" Accel Deep Deck
 Belt 0.50" x 141.125"
1/2" x 141-1/8"
 7-Pt Star / Aramid Kevlar Verify deck: some S140s ship 42" $69.99 8TEN 48" JD Deck Kit
$159.95 Save 34%
Verify Exact Fit → Amazon

Frequently Asked Fit & Bypass Questions

Q: How do I find my deck size and model number?
Check the model/serial tag under the seat or on the frame; the deck size is in the model name or owner's manual.
Q: Is a Kevlar (aramid) belt worth it?
Aramid-cord belts resist stretch and heat far better than plain rubber belts and are the OEM spec for most decks listed here.
Q: Will a different star-pattern blade fit if it's the same length?
No. The center hole must match the spindle exactly or the blade can spin loose — a safety hazard.

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