{"product_id":"len-performance-rear-track-shock-polaris-indy-matryx-54-50003r","title":"Len Performance Rear Track Shock, Polaris Indy VR1 \/ XC \/ XCR \/ Adventure Matryx 2021–2026 (54-50003R)","description":"\u003cp\u003eLen Performance LS4-50003R rebuildable rear track shock for the rear suspension on the 2021–2026 Polaris Matryx Indy VR1, XC, XCR and Adventure 128 \/ 129 \/ 136 \/ 137 in 650, 850, Patriot Boost and Patriot 9R. It replaces the factory rear track shock with a reservoir shock that has 5-click compression adjustment. At $419.95 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.\u003c\/p\u003e\u003cp\u003eThe rear track shock sets how the skid handles big hits, G-outs and bottoming with a passenger or gear on the tunnel. This is a springless unit that works with the factory rear torsion springs, so it drops in without changing the rest of the skid.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment.\u003c\/strong\u003e Sold each. Pairs with the Len Performance 54-50003F front track shock for a complete rear suspension (Len Performance sells the pair as kit LS4-50003K). Matching ski shock: 54-50000. Chassis: Polaris Matryx.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment list\u003c\/strong\u003e (Len Performance year\/model lookup)\u003c\/p\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eIndy:\u003c\/strong\u003e 2021-2023 650 Indy VR1 129 Matryx; 2021-2026 650 Indy VR1 137 Matryx; 2021-2023 850 Indy VR1 129 Matryx; 2021-2026 850 Indy VR1 137 Matryx; 2022-2024 650 Indy XC 129 Matryx; 2022-2026 650 Indy XC 137 Matryx; 2022-2025 650 Indy XCR 128; 2022-2025 650 Indy XCR 136 Matryx; 2022-2023 850 Indy Adventure 137 Matryx; 2022-2024 850 Indy XC 129 Matryx; 2022-2026 850 Indy XC 137 Matryx; 2022-2025 850 Indy XCR 128 Matryx; 2022-2025 850 Indy XCR 136 Matryx; 2023 Patriot Boost Indy VR1 129 Matryx; 2023 Patriot Boost Indy VR1 137 Matryx; 2025 Patriot 9R Indy XCR 128 Matryx; 2025 Patriot 9R Indy XCR 136 Matryx; 2026 650 Indy XCR 129; 2026 650 Indy XCR 137; 2026 Patriot 9R Indy XCR 129; 2026 Patriot 9R Indy XCR 137\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e5-click compression adjustment, tool-free.\u003c\/li\u003e\n\u003cli\u003eAluminum reservoir shock: the remote-style reservoir keeps oil temperature down and damping consistent on long pulls.\u003c\/li\u003e\n\u003cli\u003eFully rebuildable, serviceable shock. Len Performance rebuild kits and replacement parts are available.\u003c\/li\u003e\n\u003cli\u003eHardened chromoly shaft for strength and seal life.\u003c\/li\u003e\n\u003cli\u003eForged aluminum eyelet heads with premium steel and NBR bushings.\u003c\/li\u003e\n\u003cli\u003eSold each.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e54-50003R (Len Performance LS4-50003R)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOEM part number replaced\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7045431 (per distributor listings)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShock location\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRear track shock (rear suspension)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChassis \/ platform\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePolaris Matryx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAdjustments\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCompression (5)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength, extended\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e489 mm \/ 19.26 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength, compressed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e342 mm \/ 13.47 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStroke\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e147 mm \/ 5.79 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone (uses the factory torsion springs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTop eyelet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e17.8 mm ID x 29.5 mm wide (0.71 in x 1.17 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBottom eyelet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 mm ID x 22.3 mm wide (0.32 in x 0.88 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.84 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncludes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRebuild kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLen Performance rebuild kits available; call to confirm the kit number for this shock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSold\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eOrdering and installation.\u003c\/strong\u003e 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.\u003c\/p\u003e","brand":"Len Performance","offers":[{"title":"Default Title","offer_id":50446070218997,"sku":"54-50003R","price":419.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0267\/9029\/files\/len-54-50003R.jpg?v=1790126238","url":"https:\/\/a2dmotorsports.net\/products\/len-performance-rear-track-shock-polaris-indy-matryx-54-50003r","provider":"Shop A2D Motorsports ","version":"1.0","type":"link"}