Len Performance Rear Track Shock, Lynx BoonDocker / Shredder / Xterrain / 49 Ranger 2020–2026 (54-80002R)
Len Performance Rear Track Shock, Lynx BoonDocker / Shredder / Xterrain / 49 Ranger 2020–2026 (54-80002R)
Len Performance
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Product details
Len Performance LS4-80002R rebuildable rear track shock for the rear suspension on Lynx deep-snow, crossover and utility sleds: BoonDocker 3900 600R (2020–2022) and BoonDocker DS 850 3900 / 4100 (2022), Shredder 600R 146 / 154 (2023–2025), Shredder DS 3900 and Shredder RE 3700 / 3900 850 E-TEC and Turbo R (2023–2026), Xterrain 3700 / 3900 including PRO and STD and Xterrain 146 (2021–2024) and the 49 Ranger (2020–2025). It replaces the factory rear track shock with a coil-over reservoir shock. At $679.95 each, it is A2D's value pick for a rebuildable, adjustable reservoir rear track shock: clicker adjustment, a reservoir and a serviceable design without the cost of a race-level shock.
The rear track shock on the Lynx PPS skid carries its own coil spring and does most of the work on big hits, drops and deep-snow re-entries. This is a long-stroke (157 mm) coil-over unit with a 72 mm powder-coated spring, 5-click compression and 5-click rebound adjustment, and a threaded body with locking preload rings so the rear can be set for rider weight and snow conditions.
Fitment. Sold each. Lynx only. Pairs with the Len Performance 54-80002F front track shock for a complete rear suspension (Len Performance kit LS4-80002K); on the Xterrain PRO 3900 and Xterrain STD 3900 Len lists the rear shock only. Matching ski shocks: 54-80002 on the 49 Ranger and Xterrain; 54-80000LH / RH on the Shredder and BoonDocker DS. Platform: Lynx Radien (BoonDocker, Xterrain, 49 Ranger) and Radien2 (2023 and later Shredder DS / RE).
Fitment list (Len Performance year/model lookup)
- Lynx Ranger: 2020-2022 49 Ranger 600 ACE STD; 2020-2022 49 Ranger 600R E-TEC PRO; 2020-2021 49 Ranger 900 ACE; 2021-2022 49 Ranger 900 ACE PRO; 2023-2025 49 Ranger PRO 600R E-TEC; 2024-2025 49 Ranger PRO 850 E-TEC; 2023-2024 49 Ranger ST - 900 ACE Turbo; 2023-2024 49 Ranger ST 900 ACE; 2023-2025 49 Ranger STD 600 ACE
- Lynx BoonDocker: 2020-2022 Boondocker 3900 600R E-TEC; 2022 Boondocker DS 850 E-TEC 3900; 2022 Boondocker DS 850 E-TEC 4100
- Lynx Shredder: 2023-2025 Shredder 600R E-TEC 146; 2024-2025 Shredder 600R E-TEC 154; 2023-2026 Shredder DS 3900 850 E-TEC; 2023-2026 Shredder DS 3900 850 E-TEC Turbo R; 2023-2024 Shredder RE 3700 850 E-TEC; 2024 Shredder RE 3700 850 E-TEC Turbo R; 2023-2026 Shredder RE 3900 850 E-TEC; 2023-2026 Shredder RE 3900 850 E-TEC Turbo R
- Lynx Xterrain: 2021-2024 Xterrain 3700 600 EFI; 2021-2024 Xterrain 3700 600R E-TEC; 2021 Xterrain 3900 600R E-TEC; 2024 Xterrain 600 EFI 146; 2024 Xterrain 600R E-TEC 146; 2021-2023 Xterrain PRO 3900 600R E-TEC; 2021-2023 Xterrain PRO 3900 850 E-TEC; 2022-2023 Xterrain STD 3700 600 EFI; 2022-2023 Xterrain STD 3700 600R E-TEC; 2022-2023 Xterrain STD 3900 600 EFI; 2022-2023 Xterrain STD 3900 600R E-TEC
Features
- 5-click compression adjustment, tool-free.
- 5-click rebound adjustment.
- Aluminum reservoir shock: the remote-style reservoir keeps oil temperature down and damping consistent on long pulls.
- Fully rebuildable, serviceable shock. Len Performance rebuild kits and replacement parts are available.
- Hardened chromoly shaft for strength and seal life.
- Forged aluminum eyelet heads with premium steel and NBR bushings.
- Powder-coated spring resists corrosion and holds rate in cold, wet conditions.
- Threaded shock body with anodized dual-ring locking preload adjusters: set sag once and it stays set.
- Sold each.
Specifications
| Part number | 54-80002R (Len Performance LS4-80002R) |
| OEM part number replaced | 503196180 (per distributor listings) |
| Shock location | Rear track shock (rear suspension) |
| Chassis / platform | Lynx Radien / Radien2 |
| Adjustments | Compression (5) and rebound (5), plus threaded spring preload |
| Length, extended | 550 mm / 21.66 in |
| Length, compressed | 393 mm / 15.48 in |
| Stroke | 157 mm / 6.18 in |
| Spring | Powder-coated coil spring included, 72 mm / 2.84 in diameter |
| Top eyelet | 10 mm ID x 25.4 mm wide (0.4 in x 1 in) |
| Bottom eyelet | 10 mm ID x 25.4 mm wide (0.4 in x 1 in) |
| Weight | 10.25 lb |
| Includes | One shock |
| Rebuild kit | Len Performance rebuild kits available; call to confirm the kit number for this shock |
| Sold | Each |
Ordering and installation. Sold each. Ships from stock at our Anchorage shop, or from our distributor's Boise, Idaho warehouse when not on the shelf. In-store pickup is available at checkout. Installation and shock setup are available at A2D Motorsports; call (907) 306-3062 to schedule. Len Performance rebuild kits are available, so the shock can be serviced or re-valved rather than replaced.