John Deere D100 / D110 / D130 / L100 / E100 / S100 42" Deck — 7-Point Star Blade GX22151 / AM137328 & 1/2" x 103.875" Kevlar Belt GX20072

Exact OEM part-number, blade center-hole star pattern and Kevlar belt length cross-reference for John Deere D100 / D110 / D130 / L100 / E100 / S100 42" 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 D100 / D110 / D130 Group: JD 42" 2-Blade Deck	Blade 21.0" \| Belt 0.50" x 103.875" 21" \| 1/2" x 103-7/8"	7-Pt Star / Aramid Kevlar	6-star MTD blades spin loose on JD 7-star spindles	$36.99 / $59.99	Oregon Gator G3 GX22151 2-Pack + Kevlar GX20072 $42.99 / $31.95 Save 42%	Verify Exact Fit → Amazon
John Deere L100 / L110 Group: JD 42" 2-Blade Deck	Blade 21.0" 21"	7-Pt Star / Aramid Kevlar	AM137328 is the older equivalent	$36.99	USA Mower Blades GX22151 $19.95 Save 46%	Verify Exact Fit → Amazon
John Deere E100 / S100 Group: JD 42" Accel Deep Deck	Belt 0.50" x 103.875" 1/2" x 103-7/8"	7-Pt Star / Aramid Kevlar	Check deck serial; some E100s use GX20072 + idler GX22420	$59.99	8TEN 42" JD Deck Kit $129.95 Save 36%	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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