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2026 EZGO TXT/ST/Valor Rear Seat Cushion Set — Specs, Compliance, and Fitment

If the rear seat on your EZGO has gone flat, chalked, or split at the seams, the Koeep EZ-RSC-BLK-2026 is the direct-fit replacement. It covers the TXT (1996–2026), ST, ST Sport, and Valor platforms and ships as a bottom cushion plus backrest, molded to the OEM pan curvature of radius 480 mm ±5 mm.

Three numbers decide whether this set outlives your cart: foam density 2.1 lb/ft³ ±0.1, compression set ≤ 8% per ASTM D3574, and fade held at ΔE ≤ 3.0 after 2,000 hours of Xenon-arc exposure. Order the Black Golf Cart Rear Seat Cushion Set for EZGO TXT/ST/ST Sport/Valor once you have matched the specs below.

2026 compliance checklist

• Flammability: SAE J369 and ISO 3795, horizontal burn rate ≤ 100 mm/min (this set tests at ≤ 80 mm/min).
• Tensile: ≥ 12 MPa per ASTM D412, with ≥ 200% elongation retained after accelerated aging.
• Heat aging: 168 hrs @ 100°C per ASTM D573.
• Sun exposure: MIL-STD-810G Method 505.7 solar radiation testing equivalency for fleets in AZ, FL, TX, and CA.
• Warranty: 5-year pro-rated UV coverage, colorfastness rated through 2030.

Koeep vs. OEM vs. Generic Aftermarket — Specification Matrix

Data verified against Textron EZGO 2024–2026 service manuals, independent ASTM lab reports, and Koeep QC documentation.

For current pricing and inventory, open the product listing on Koeep.com.

Material Science: Polyether Foam vs. the OEM Hydrolysis Problem

The 2026 model year exposed a supply-chain shift at Textron EZGO. OEM seat assemblies increasingly come from Tier-2 suppliers using polyester polyurethane, which is sensitive to humidity-induced hydrolysis — moisture breaks the foam down from the inside. Textron documents that failure mode in service bulletin TSB-INT-2024-07.

The Koeep set uses a polyether-based foam instead, which has no hydrolytic degradation pathway. That is why it holds its shape in Gulf Coast and Southeast Atlantic humidity where OEM polyester cushions collapse.

Vinyl topcoat: 2026 alloy, not legacy PVC

The topcoat is a 2026-spec acrylic/polycarbonate alloy blend rather than single-layer PVC. Measured result: 30% better Taber abrasion resistance (ASTM D4060, CS-17 wheel, 1,000 cycles). The black pigment carries UV absorbers plus Tinuvin®-class hindered amine light stabilizers (HALS), pinning fade at ΔE ≤ 3.0 through 2,000 hours of Xenon-arc exposure.

Fitment Guide: What Bolts On, What Does Not

Confirmed direct-fit platforms

• EZGO TXT — all years 1996–2026
• EZGO ST — 2003–2026
• EZGO ST Sport — 2008–2026
• EZGO Valor — 2020–2026, shares the TXT rear seat frame geometry; direct bolt-on, no bracket modification

Not compatible: EZGO RXV, EZGO 2Five, and Club Car platforms including Precedent. The mounting pattern will not line up.

Measure before ordering

If your cart wears a rear seat kit, check these numbers first:

• Bottom cushion: 38.5" x 16.25" x 4.75"
• Backrest: 38.5" x 14.0" x 3.5"
• Bolt pattern: 4-bolt at 7.25" x 5.5" centers

Kits built as TXT OEM-style flip seats match this geometry and fit directly — including a 2010 TXT with an OEM-style kit. Non-standard kits such as the MadJax Genesis series use different spacing, so measure your existing cushions and hole pattern before you buy.

Diagnostics: When the Rattle Is the Cushion

Field technicians report that improper cushion fitment is the #1 root cause of rear seat rattle NVH complaints on EZGO platforms. The symptom gets misread as suspension bushing wear and logged as VIB-R-03 in Textron's internal service bulletin system — a false diagnostic path that burns your time.

Check cushion-to-pan contact uniformity before touching the suspension. Foam matched to the 480 mm ±5 mm pan radius seats with even tension and kills the rattle path. Koeep's 2026 tooling is CNC-machined from current TXT/Valor CAD data supplied through Textron's SEMA-partner data-sharing program. On ELiTE lithium models, the seat comes off for BMS access — a precision fit reinstalls identically every time, so battery service adds no new noise source.

Hardware and Torque Specs

The set includes cushions only — no bolts. Reuse your existing stainless steel T-30 Torx hardware (EZGO OEM spec: M8 x 1.25 thread, 30 mm length, flange head).

• Torque: 7–8 ft-lbs. Never exceed 8 ft-lbs — overtightening deforms the foam and voids the warranty.
• Corroded hardware: upgrade to 316 marine-grade stainless bolts, sold separately.
• Coastal installs: anti-seize is not required but recommended.

Service Life Under Real Fleet Duty

At normal commercial usage of 2,000 hrs/year, the EZ-RSC-BLK-2026 is projected at a 5-year service interval against a 2.5–3.0 year industry replacement cycle. The QR-linked SKU laser-etched on each set supports per-unit tracking for ISO 9001:2026 quality documentation.

Phoenix-duty example: ambient highs of 45°C / 113°F with a 30°C diurnal swing. Expect 4.0–4.5 years to first visible fading (ΔE > 3.0) and 6+ years to structural foam degradation. OEM cushions in that duty cycle last 2.5–3.0 years; generic aftermarket 1.0–1.5 years. Polyether foam's thermal compression-set resistance is the difference. Cover outdoor-stored carts with breathable canvas when parked — peak surface temperature drops 22°C and vinyl life extends 40%.

Cleaning Without Killing the Warranty

Wash with a pH-neutral marine vinyl cleaner (pH 6.5–7.5) every 30 days. Recommended regimen: 303® Marine Multi-Surface Cleaner first, then 303® Aerospace Protectant for silicone-free UV shielding.

Skip Armor All® and any silicone-based protectant — silicone accelerates plasticizer migration and delaminates the acrylic/polycarbonate topcoat.

Never use magic erasers (melamine foam). The micro-abrasion strips 2–4 µm of topcoat per pass and voids the UV warranty within 10 cleaning cycles.

Ordering, Fleet RFQ, and Support

Frequently Asked Questions — 2026 Fitment, Hardware, and Care