{"product_id":"sdi-shock-rear-can-am-stm-ma-2623008-r","title":"SDI Can-Am Defender HD11 Terrain Master 2.1 Rear Shocks (2026+)","description":"\u003cp\u003e\u003cstrong\u003eThe SDI Terrain Master 2.1 rear shocks are Can-Am Defender HD11 shocks for 2026+ HD11 and MAX HD11 models, replacing the rear factory shocks with adjustable piggyback-reservoir shocks.\u003c\/strong\u003e They are a direct-replacement upgrade for HD11 owners who haul in the bed and want the rear to stay composed on rough ground.\u003c\/p\u003e\n\u003cp\u003eSDI built the Terrain Master 2.1 as a direct-replacement suspension upgrade for the Defender HD11, aimed at improving comfort, control and stability. This listing is the rear position only (SDI part STM-MA-2623008-R); the matching front shocks and the complete front-and-rear Terrain Master 2.1 set for the HD11 are listed separately.\u003c\/p\u003e\n\u003cp\u003eIf you are comparing aftermarket UTV shocks, the Terrain Master 2.1 is SDI suspension built as a UTV shocks upgrade for stock-travel machines like the Can-Am Defender HD11. Compared with basic replacement UTV shock absorbers, these side-by-side shocks add real compression and preload adjustment, the main difference between adjustable SxS shocks like these and stock-style replacements. As UTV rear shocks, they bolt into the factory mounts. These Defender rear shocks are a Can-Am Defender shock upgrade and Can-Am Defender suspension upgrade for HD11 models only. Other Can-Am Defender shocks, including HD10 parts, are not interchangeable; check that each Defender shock you order matches your model.\u003c\/p\u003e\n\u003chr\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect-replacement Terrain Master 2.1 shock for the Defender HD11 rear\u003c\/li\u003e\n\u003cli\u003eLarge bore compression adjuster for optimized frequency response and adjustment range\u003c\/li\u003e\n\u003cli\u003eBillet aluminum T6 high-flow pistons for low opening forces and sensitive frequency response\u003c\/li\u003e\n\u003cli\u003eLow-friction piggyback reservoir\u003c\/li\u003e\n\u003cli\u003eRace-style quick-adjust preload ring\u003c\/li\u003e\n\u003cli\u003eInternal components machined from high-strength aluminum and anodized, with no plastic inside the shock\u003c\/li\u003e\n\u003cli\u003eInduction-hardened shafts with hard chrome coating\u003c\/li\u003e\n\u003cli\u003eSuper high-tensile lightweight barrel-formed springs\u003c\/li\u003e\n\u003cli\u003ePTFE-lined 28 mm spherical bearings with sealed spacers\u003c\/li\u003e\n\u003cli\u003e3-piece fully rebuildable seal head\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\u003ch2\u003eBuilt To Solve: Can-Am Defender HD11 Rear Sag And Harshness\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRear end that squats or bottoms when hauling equipment or towing\u003c\/li\u003e\n\u003cli\u003eHarsh, unsettled rear ride over chop and washboard\u003c\/li\u003e\n\u003cli\u003eNo adjustable rear compression damping on the factory shocks\u003c\/li\u003e\n\u003cli\u003eWorn or leaking rear shocks that need replacing anyway\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\u003ch2\u003eBest For: Can-Am Defender HD11 And MAX HD11 Owners\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e2026 Defender HD11 XT, Limited and X mr owners\u003c\/li\u003e\n\u003cli\u003e2026 Defender MAX HD11 XT, Limited and Lone Star owners\u003c\/li\u003e\n\u003cli\u003eOwners who haul tools, feed or gear in the Defender bed\u003c\/li\u003e\n\u003cli\u003eRiders finishing a front-shock upgrade with matching rear shocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eProduct line: SDI Terrain Master 2.1 (TM2.1), designed for standard-travel UTVs\u003c\/li\u003e\n\u003cli\u003ePosition: rear\u003c\/li\u003e\n\u003cli\u003eIncluded: SDI Terrain Master 2.1 rear shock assembly, part STM-MA-2623008-R. SDI does not publish a per-box shock count for this rear-only part; contact us to confirm before ordering\u003c\/li\u003e\n\u003cli\u003eReservoir: piggyback\u003c\/li\u003e\n\u003cli\u003eAdjustment: compression adjuster and quick-adjust preload ring\u003c\/li\u003e\n\u003cli\u003eBearings: PTFE-lined 28 mm spherical with sealed spacers\u003c\/li\u003e\n\u003cli\u003eInstall: direct replacement for the factory rear shocks, per SDI\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: STM-MA-2623008-R\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCan-Am Defender HD11 XT (2026)\u003c\/li\u003e\n\u003cli\u003eCan-Am Defender HD11 Limited (2026)\u003c\/li\u003e\n\u003cli\u003eCan-Am Defender HD11 X mr with Doors (2026)\u003c\/li\u003e\n\u003cli\u003eCan-Am Defender MAX HD11 XT (2026)\u003c\/li\u003e\n\u003cli\u003eCan-Am Defender MAX HD11 Limited (2026)\u003c\/li\u003e\n\u003cli\u003eCan-Am Defender MAX HD11 Lone Star (2026)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis part is for the Defender HD11 platform introduced for 2026. It is not the Defender HD10 part; HD10 Terrain Master shocks are sold separately and are split by 64 in and 65 in width. Fitment is not guaranteed on models, trims or years not listed; confirm your exact model before ordering.\u003c\/p\u003e\n\u003chr\u003e\u003ch2\u003eFAQ\u003c\/h2\u003e\u003ch3\u003eWill these rear shocks help my Defender HD11 carry a load?\u003c\/h3\u003e\u003cp\u003eSDI built the Terrain Master 2.1 for HD11 owners hauling gear and equipment over rough access roads, and the compression adjuster and preload ring let you set the rear for load.\u003c\/p\u003e\u003ch3\u003eDo these fit the Defender HD10?\u003c\/h3\u003e\u003cp\u003eNo. This part is for the 2026+ Defender HD11 and MAX HD11. HD10 Terrain Master shocks are separate parts and are split by 64 in and 65 in width.\u003c\/p\u003e\u003ch3\u003eDo they fit the Defender MAX HD11?\u003c\/h3\u003e\u003cp\u003eYes. Confirmed MAX HD11 trims are the XT, Limited and Lone Star for 2026, along with the two-seat HD11 XT, Limited and X mr.\u003c\/p\u003e\u003ch3\u003eDo I need to replace the front shocks too?\u003c\/h3\u003e\u003cp\u003eNot to install them, but matching front and rear gives the most balanced ride. The SDI HD11 front shocks and the complete Terrain Master 2.1 set are listed separately.\u003c\/p\u003e\u003ch3\u003eAre they a direct replacement?\u003c\/h3\u003e\u003cp\u003eYes. SDI describes the Terrain Master 2.1 as a direct replacement upgrade for compatible Defender HD11 models, using the factory shock mounts.\u003c\/p\u003e\u003ch3\u003eHow is this different from the complete Terrain Master 2.1 HD11 kit?\u003c\/h3\u003e\u003cp\u003eThis listing is the rear position only. The complete SDI Terrain Master 2.1 Defender HD11 set covers front and rear in one order.\u003c\/p\u003e\n\u003chr\u003e\u003ch2\u003eWhy SDI\u003c\/h2\u003e\u003cp\u003eSDI (Suspension Direct) designs and develops the Terrain Master 2.1 in the US as a passive, adjustable shock for standard-travel utility side-by-sides, replacing factory emulsion shocks that SDI describes as over-sprung. Every Terrain Master 2.1 is fully rebuildable, so it can be serviced instead of thrown away. Dunes 2 Dezert SXS ships SDI shocks nationwide.\u003c\/p\u003e\n\u003chr\u003e\u003ch2\u003eFinish Your Can-Am Defender HD11 Rear Shock Upgrade\u003c\/h2\u003e\u003cp\u003eConfirm your HD11 or MAX HD11 trim in the fitment list, then add the SDI Terrain Master 2.1 rear shocks. Pair them with the SDI HD11 front shocks for a matched setup, and set preload for your typical load after install.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Will these rear shocks help my Defender HD11 carry a load?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"SDI built the Terrain Master 2.1 for HD11 owners hauling gear and equipment over rough access roads, and the compression adjuster and preload ring let you set the rear for load.\"}}, {\"@type\": \"Question\", \"name\": \"Do these fit the Defender HD10?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. This part is for the 2026+ Defender HD11 and MAX HD11. 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