Bestop Trektop NX Slantback Soft Top Black Diamond Jeep Wrangler JL 4-Door | 56863-35

Overview

The Bestop Trektop NX Slantback Soft Top (56863-35) in Black Diamond is the first and only premium fastback-style aftermarket soft top engineered specifically for the 2018–2026 Jeep Wrangler JL 4-Door Unlimited. Designed to replace a worn OEM top or upgrade your Jeep's look and versatility, it transitions effortlessly between a fully enclosed all-season top and an open-air bikini, making it the ultimate year-round soft top for Wrangler JL owners. Built by Bestop — the industry's most trusted Jeep soft top manufacturer — this frameless design delivers a clean, aggressive fastback silhouette with no compromise on weather protection.

Key Features & Benefits

• Fastback Slantback Design — The only aftermarket fastback soft top on the market for the JL Wrangler, delivering a sleek, sporty profile that sets your build apart from factory and traditional square-back tops.
• 4-in-1 Versatility — Run fully enclosed for all-weather protection, flip open the Sunrider panel for a sunroof experience, remove side windows for a Safari open-air ride, or strip to a full bikini top in minutes.
• Built-In Sunrider Sunroof — The front section folds back from inside the vehicle by simply releasing the windshield channel latches — no need to exit the Jeep or remove the entire top.
• Hybrid Zipper / C-Channel Window System — The innovative combination of YKK-style zippers and zipperless c-channel tracks makes removing and reinstalling side and rear window panels fast, easy, and painless.
• 28-oz Multi-Ply Premium Black Diamond Fabric — Heavy-duty, multi-layer sailcloth fabric maintains shape across all temperatures, resists water intrusion, mildew, and UV fading for lasting durability season after season.
• DOT-Approved 30-Mil Tinted Windows — Refined 18%-tinted, DOT-approved 30-mil vinyl windows reduce glare and sun load, keeping interior temps down during warmer months while maintaining clear outward visibility.
• Improved Noise Reduction & Insulation — The premium fabric and tight-sealing door surrounds combine for reduced road noise and better cabin insulation compared to older or worn soft tops — especially noticeable on highway drives.
• Tailgate Bar & Clips Included — Open your rear cargo area without unzipping or removing the rear window, thanks to the included tailgate bar and clip system.
• Zippered Map Pockets — Integrated storage pockets above the driver and front passenger seats keep small items organized and secured.
• Frameless Construction — No external bow system required; the Wrangler JL's own sport bars provide the structural support, resulting in a cleaner look and simpler operation than any framed alternative.
• Compatible with Factory Doors — Works seamlessly with all factory half and full steel doors on the JL platform — no modifications needed.
• 5-Year Limited Warranty — Backed by Bestop's industry-leading 5-Year Limited Warranty on the Black Diamond fabric top.

What's Included

• Black Diamond fabric top deck
• Top arch bar
• Factory-style windshield channel
• Door surrounds (pair)
• Tailgate bar & clips
• Side window panels (pair)
• Rear window panel
• All required installation hardware (no drilling required)
• Bestop installation instructions

Specifications

Manufacturer Part #	56863-35
SKU	BES56863-35
UPC	077848138684
Brand	Bestop
Color / Finish	Black Diamond
Top Style	Fastback / Slantback
Fabric Weight	28-oz Multi-Ply Premium Sailcloth
Window Thickness	30-mil DOT-Approved Tinted Vinyl
Window Tint	18%
Frame Type	Frameless (sport bars provide structure)
Warranty	5-Year Limited
Weight	58.0 lbs
Package Dimensions	60" L × 27" W × 7" H

Fitment & Compatibility

The Bestop Trektop NX Slantback Soft Top (56863-35) is engineered exclusively for 2018–2026 Jeep Wrangler JL 4-Door (Unlimited) models, including the Sport, Sport S, Sahara, Rubicon, and Willys trims. This top is designed for 4-door models only and is not compatible with the 2-door JL Wrangler. Compatible with all factory half and full steel doors. Does not fit the JK (2007–2018) or older Wrangler platforms.

• 2018 Jeep Wrangler JL Unlimited (all trims)
• 2019 Jeep Wrangler JL Unlimited (all trims)
• 2020 Jeep Wrangler JL Unlimited (all trims)
• 2021 Jeep Wrangler JL Unlimited (all trims)
• 2022 Jeep Wrangler JL Unlimited (all trims)
• 2023 Jeep Wrangler JL Unlimited (all trims)
• 2024 Jeep Wrangler JL Unlimited (all trims)
• 2025 Jeep Wrangler JL Unlimited (all trims)
• 2026 Jeep Wrangler JL Unlimited (all trims)

Installation

The Bestop Trektop NX is a no-drill, bolt-on installation suitable for those with light to moderate mechanical experience. All required hardware is included in the box. Most installers complete the job in approximately 2–4 hours on their first install, following Bestop's included step-by-step instructions or their official YouTube video walkthrough. Important: For best results, install the soft top at or near 72°F (22°C). In colder temperatures, the fabric may temporarily contract by an inch or more and may appear wrinkled — this is normal. Allow a few days after installation for the fabric to relax and conform properly. No professional installation is required, though a second person can be helpful during initial setup.

Frequently Asked Questions

Q: Is the Bestop Trektop NX (56863-35) compatible with the 2-door Jeep Wrangler JL?
A: No. Part number 56863-35 is designed exclusively for the 4-door JL Wrangler Unlimited. A separate model is available for 2-door applications.

Q: Does this soft top replace the entire factory top or just the fabric?
A: This is a complete soft top kit, including all fabric panels, hardware, windshield channel, door surrounds, and tailgate bar — everything needed for a full replacement of the factory soft top.

Q: Can I use the Trektop NX as a year-round top?
A: Yes. The 28-oz multi-ply premium fabric and sealed window system provide all-season protection, making it suitable for daily driving in rain, cold, and heat.

Q: Is this top CARB compliant?
A: The Trektop NX is a non-emissions-related exterior accessory and is not subject to CARB (California Air Resources Board) certification requirements.