{"product_id":"r38-2sc-arctic-leopard-xe-pro-s-enduro-r","title":"Sirris R38 CMX Rear Shock | Arctic Leopard XE Pro S, Enduro, XE Pro R \u0026 Vetra Blazer","description":"\u003ch1 style=\"text-align: center;\"\u003eSirris R38 CMX Rear Shock | Arctic Leopard \u0026amp; Vetra Blazer\u003c\/h1\u003e\n\u003ch2 style=\"text-align: center;\"\u003eBig Moto Performance. Bombproof Durability.\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSirris R38 CMX Rear Shock\u003c\/strong\u003e brings full-size motocross suspension technology to high-performance e-motos. Designed for the \u003cstrong\u003eArctic Leopard XE Pro S, Enduro, XE Pro R, and Vetra Blazer\u003c\/strong\u003e, the R38 takes proven internal architecture from Sirris' larger R46 platform and packages it into a more compact shock built to handle serious e-moto riding.\u003c\/p\u003e\n\u003cp\u003eThis is not simply a larger spring or a reworked stock-style shock. Sirris built the R38 around a \u003cstrong\u003e38mm high-flow main piston, massive 16mm hollow shaft, R46-spec internal floating piston system, and independently adjustable high-speed and low-speed compression\u003c\/strong\u003e. The goal is better control, heat management, traction, and consistency when you're riding hard enough to make standard suspension start showing its limitations.\u003c\/p\u003e\n\u003cp\u003eThe R38 is also tuned specifically for each bike application and designed to pair with the \u003cstrong\u003eSirris F43 CMX Fork\u003c\/strong\u003e. Together, the F43 and R38 create a more balanced suspension package for riders looking for predictable front-to-rear performance through rough terrain, jumps, braking bumps, and repeated high-speed impacts.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eImportant Linkage Requirement\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eThe stock Arctic Leopard linkage WILL NOT work with the Sirris R38.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFitting a shock this substantial into a compact e-moto chassis required a different approach. Sirris teamed up with \u003cstrong\u003eTMB\u003c\/strong\u003e to develop an \u003cstrong\u003eR38-specific linkage\u003c\/strong\u003e for the Arctic Leopard platform. This linkage is \u003cstrong\u003esold separately\u003c\/strong\u003e and is required for proper installation on Arctic Leopard models.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eRider Weight \u0026amp; Spring Options\u003c\/h2\u003e\n\u003cp\u003eSirris offers two spring ranges when selecting the R38. Listed weights are the rider's weight \u003cstrong\u003ewithout riding gear\u003c\/strong\u003e. Sirris calculates approximately 15 pounds of riding gear into these ranges.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e140 lbs to 180 lbs:\u003c\/strong\u003e Medium, 110 N\/mm spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180 lbs to 220 lbs:\u003c\/strong\u003e Heavy, 120 N\/mm spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchitecture:\u003c\/strong\u003e Piggyback, steel spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 68mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 269mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.3 lbs \/ 1.5 kg without spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottom Out:\u003c\/strong\u003e MCU bumper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Out:\u003c\/strong\u003e Rubber bumper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeals:\u003c\/strong\u003e HNBR\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003e2SC Two-Stage Compression Adjustment\u003c\/h2\u003e\n\u003cp\u003eThe R38 uses Sirris' \u003cstrong\u003e2SC Two-Stage Compression\u003c\/strong\u003e system, giving riders independent control over high-speed and low-speed compression. This lets you make more meaningful suspension adjustments based on terrain and riding style instead of relying on a single compression setting to handle everything.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Speed Compression:\u003c\/strong\u003e Tool-free adjustment, 18 clicks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Speed Compression:\u003c\/strong\u003e 24 clicks, adjusted with a 20mm hex\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRebound:\u003c\/strong\u003e Tool-free adjustment, 24 clicks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring Preload:\u003c\/strong\u003e Adjustable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eCMX High-Flow Damping\u003c\/h2\u003e\n\u003cp\u003eThe R38 shares the same \u003cstrong\u003ehigh-flow base valve cavity architecture\u003c\/strong\u003e found in the larger Sirris R46. The increased oil flow is designed to provide the damping control and consistency riders expect from full-size motorcycle suspension while still fitting the tighter packaging requirements of an e-moto.\u003c\/p\u003e\n\u003cp\u003eSirris' \u003cstrong\u003eCMX, or Compact Motocross Tune\u003c\/strong\u003e, uses fully tunable compression and rebound circuits with high-flow internals designed to stay cool and consistent. The system provides improved pressure balance and faster frequency response, helping the shock react to rapid changes in terrain without losing its composure through repeated hits.\u003c\/p\u003e\n\u003cp\u003eEach application is tuned specifically for the bike model. When paired with the \u003cstrong\u003eSirris F43 CMX Fork\u003c\/strong\u003e, the R38 is designed to provide balanced front and rear suspension performance with improved traction, control, and confidence at speed.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eR46-Spec Reservoir\u003c\/h2\u003e\n\u003cp\u003eThe reservoir is engineered around the R38's large \u003cstrong\u003e16mm shaft\u003c\/strong\u003e and its increased oil displacement requirements. A massive \u003cstrong\u003eR46-spec internal floating piston system\u003c\/strong\u003e manages shaft displacement while helping maintain consistent damping during repeated hard impacts and high heat loads.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e16mm R46 Shaft\u003c\/h2\u003e\n\u003cp\u003eThe R38 uses the \u003cstrong\u003esame shaft design as the larger R46\u003c\/strong\u003e. Its 16mm induction heat-treated hollow shaft combines serious structural strength with the ability to move a large volume of oil through the main piston.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 16mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 5.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Induction-hardened steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Hollow\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Hard chrome\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eShock Body \u0026amp; Main Piston\u003c\/h2\u003e\n\u003cp\u003eSirris developed a smaller-diameter shock body, spring, retainers, and hardware package for the R38 to fit compact e-moto chassis without giving up the oversized internal flow characteristics responsible for its performance.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eshock body\u003c\/strong\u003e is constructed from seamless 6061 aluminum with a Type 3 hard-anodized coating and ACME threads for durability and precise spring adjustment.\u003c\/p\u003e\n\u003cp\u003eInside is a \u003cstrong\u003e38mm high-flow main piston\u003c\/strong\u003e using true powersports-style architecture. While slightly smaller than the R46 piston, it follows the same design philosophy and provides a broad tuning range with consistent damping under demanding riding conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMain Piston:\u003c\/strong\u003e 38mm high-flow design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Material:\u003c\/strong\u003e CNC-machined 6061 billet aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Finish:\u003c\/strong\u003e Type 3 hard anodized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePiston Band:\u003c\/strong\u003e Hard band\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eSpring Retainer, Body Cap \u0026amp; Eyelet\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003espring retainer\u003c\/strong\u003e is made from seamless 6061 aluminum with a Type 3 hard-anodized finish, ACME thread, locking feature, and manual adjustment.\u003c\/p\u003e\n\u003cp\u003eA redesigned \u003cstrong\u003eupper body cap\u003c\/strong\u003e gives the R38 the tighter packaging required for smaller e-moto chassis without sacrificing internal oil-flow performance. It uses ultra-durable chrome-plated, Teflon-lined spherical bearings.\u003c\/p\u003e\n\u003cp\u003eThe new \u003cstrong\u003elower eyelet\u003c\/strong\u003e is also designed around compact bike fitment while maintaining maximum rebound oil flow to the shaft and metering rod. It also uses ultra-durable chrome-plated, Teflon-lined spherical bearings.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWhy Upgrade to the R38?\u003c\/h2\u003e\n\u003cp\u003eHigh-power e-motos can put a surprising amount of heat and force into a rear shock, especially with heavier riders, repeated jumps, fast trail riding, and rough terrain. The R38 addresses that with components normally associated with much larger suspension systems. The \u003cstrong\u003e16mm R46 shaft, 38mm high-flow piston, large IFP reservoir, and independent high-speed and low-speed compression circuits\u003c\/strong\u003e give riders more control over how the rear of the bike behaves instead of simply making the suspension stiffer.\u003c\/p\u003e\n\u003cp\u003eThat makes the R38 especially useful for riders who want their Arctic Leopard or Vetra Blazer to behave more like a properly set up dirt bike when the terrain gets rough. Better damping control can help the rear tire stay connected through uneven terrain while providing the support needed for harder impacts and aggressive riding.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eArctic Leopard XE Pro S\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eArctic Leopard XE Pro S Enduro\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eArctic Leopard XE Pro R\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eVetra Blazer\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eArctic Leopard Fitment Note:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/em\u003e The \u003cstrong\u003eR38-specific TMB linkage is required and sold separately\u003c\/strong\u003e when installing the R38 on compatible Arctic Leopard models. The factory Arctic Leopard linkage is not compatible with the Sirris R38 shock.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWho Is the Sirris R38 For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnduro and technical trail riders\u003c\/strong\u003e looking for better traction and damping control through rocks, roots, braking bumps, and fast-changing terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJump and track riders\u003c\/strong\u003e who regularly put the rear suspension through repeated hard impacts and need better heat management and bottom-out control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance-focused Arctic Leopard and Vetra Blazer riders\u003c\/strong\u003e building a more capable, adjustable suspension package for aggressive riding.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sirris Store","offers":[{"title":"Medium (140-180 lb) \/ CMX \/ 2SC","offer_id":52573114368290,"sku":"238-99-005-MED-R38-269X68-ARCTICLEOPARD-XEPROALL","price":899.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX \/ 2SC","offer_id":52573114401058,"sku":"238-99-005-HEAVY-R38-269X68-ARCTICLEOPARD-XEPROALL","price":899.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0093\/1672\/8892\/files\/sirris-R38-shock-front-arcticleopard-xepro.jpg?v=1789667267","url":"https:\/\/revrides.com\/products\/r38-2sc-arctic-leopard-xe-pro-s-enduro-r","provider":"REVRides","version":"1.0","type":"link"}