{"product_id":"r38-2sc-e-ride-pro-sr","title":"Sirris R38 Rear Shock | E Ride Pro SR","description":"\u003ch1 style=\"text-align: center;\"\u003eSirris R38 Rear Shock | E Ride Pro SR\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eBig moto performance. Bombproof durability.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Sirris R38 rear shock brings proven, full-size motocross suspension technology to the E Ride Pro SR. It combines internal architecture shared with the larger Sirris R46 platform, a high-flow damping system, and an oversized chassis engineered to handle repeated hard hits, high temperatures, aggressive trail riding, and serious abuse.\u003c\/p\u003e\n\u003cp\u003eWhere smaller shocks can begin to fade, leak, or lose consistency under demanding riding, the R38 is designed to keep its damping controlled and predictable. Its pro-level CMX, or Compact Motocross Tune, provides the pressure balance, rapid response, traction, and support normally associated with much larger powersports suspension.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/revrides.com\/products\/prickly-linkage-for-sirris-r38-e-ride-pro-sr-3-0\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eLink to linkage rocker you need here!\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eSpring Rate Options\u003c\/h2\u003e\n\u003cp\u003eSirris offers two spring-rate ranges for the E Ride Pro SR. Select the option using your body weight without riding gear. Sirris has already calculated 15 pounds of riding gear into the listed ranges.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium:\u003c\/strong\u003e 140 to 180 lb rider, 90 N\/mm spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy:\u003c\/strong\u003e 180 to 220 lb rider, 100 N\/mm spring\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchitecture:\u003c\/strong\u003e Piggyback shock with steel spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 289 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke:\u003c\/strong\u003e 78 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.3 lb \/ 1.5 kg without spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottom-out system:\u003c\/strong\u003e MCU bumper\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop-out system:\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\u003ch3 style=\"text-align: center;\"\u003e2SC Compression and Rebound Adjustment\u003c\/h3\u003e\n\u003cp\u003eThe R38 uses Sirris 2SC, or Two Stage Compression, with independently adjustable high-speed and low-speed compression circuits. This gives riders more control over chassis movement, sharp impacts, jumps, braking bumps, and overall rear-wheel traction.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTool-free low-speed compression adjustment, 18 clicks\u003c\/li\u003e\n\u003cli\u003eHigh-speed compression adjustment, 24 clicks using a 20 mm hex\u003c\/li\u003e\n\u003cli\u003eTool-free rebound adjustment, 24 clicks\u003c\/li\u003e\n\u003cli\u003eAdjustable spring preload\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: center;\"\u003eHigh-Flow Damping Architecture\u003c\/h3\u003e\n\u003cp\u003eThe R38 shares the high-flow base-valve cavity architecture used in the larger Sirris R46. Its increased oil flow creates a genuine moto-level damping feel with better control and consistency. Fully tunable compression and rebound circuits help the shock remain cool and predictable during repeated impacts and demanding riding.\u003c\/p\u003e\n\u003cp\u003eThis high-flow design improves pressure balance and frequency response, allowing the shock to react quickly to changing terrain without becoming harsh or unsettled. Each R38 is tuned specifically for its intended bike model and is designed to pair with the Sirris F43 CMX fork for balanced suspension performance, dependable traction, and greater confidence at speed.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eReservoir\u003c\/h3\u003e\n\u003cp\u003eThe reservoir is designed around the large 16 mm shock shaft and its increased oil-displacement requirements. An R46-spec internal floating piston system precisely manages shaft displacement, helping maintain a consistent damping feel through repeated hard hits and high heat loads.\u003c\/p\u003e\n\u003ch3 style=\"text-align: center;\"\u003eShock Shaft\u003c\/h3\u003e\n\u003cp\u003eThe R38 uses the same shaft design as the R46. Its massive 16 mm induction heat-treated hollow steel shaft has a hard chrome finish for extreme structural strength and increased oil flow through the main piston.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e16 mm outside diameter\u003c\/li\u003e\n\u003cli\u003e5.5 mm inside diameter\u003c\/li\u003e\n\u003cli\u003eChrome-plated, induction-hardened steel\u003c\/li\u003e\n\u003cli\u003eHollow construction for high oil flow\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: center;\"\u003eShock Body\u003c\/h3\u003e\n\u003cp\u003eA smaller-diameter body, spring, retainer, and hardware package allow the R38 to fit compact e-moto platforms while retaining the oversized internal flow characteristics responsible for its controlled ride quality.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSeamless 6061 aluminum construction\u003c\/li\u003e\n\u003cli\u003eType III hard-anodized coating\u003c\/li\u003e\n\u003cli\u003eACME thread\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: center;\"\u003eMain Piston and Piston Band\u003c\/h3\u003e\n\u003cp\u003eThe 38 mm high-flow main piston uses true powersports architecture. It is slightly smaller than the R46 piston but follows the same design philosophy, providing a wide tuning range and consistent damping performance beyond what is commonly found in this compact shock category.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined 6061 billet aluminum piston\u003c\/li\u003e\n\u003cli\u003eType III hard-anodized coating\u003c\/li\u003e\n\u003cli\u003eHard piston band\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: center;\"\u003eSpring Retainer\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSeamless 6061 aluminum\u003c\/li\u003e\n\u003cli\u003eType III hard-anodized coating\u003c\/li\u003e\n\u003cli\u003eACME thread\u003c\/li\u003e\n\u003cli\u003eManual preload adjustment with locking feature\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"text-align: center;\"\u003eBody Cap and Lower Eyelet\u003c\/h3\u003e\n\u003cp\u003eThe upper body cap is engineered for tighter chassis clearance without restricting internal oil flow. A model-specific lower eyelet maintains maximum rebound oil flow to the shaft and metering rod while allowing the R38 to fit smaller e-moto platforms.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUltra-durable chrome-plated spherical bearings\u003c\/li\u003e\n\u003cli\u003eTeflon-lined bearing surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eFitment and Required Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e E Ride Pro SR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired linkage:\u003c\/strong\u003e Sirris and Prickly R38-specific linkage, sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShock size:\u003c\/strong\u003e 289 x 78 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRear ride-height change:\u003c\/strong\u003e The required linkage raises the rear of the bike by 25 mm to provide clearance and optimized suspension geometry\u003c\/li\u003e\n\u003cli style=\"color: rgb(255, 42, 0);\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The stock E Ride Pro linkage will not work with the Sirris R38 shock\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional front-height correction:\u003c\/strong\u003e A CMX fork drop clamp can be added to raise the front by an equivalent 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended fork pairing:\u003c\/strong\u003e Sirris F43 CMX fork\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWhy Upgrade to the R38?\u003c\/h2\u003e\n\u003cp\u003eThe R38 stands out because Sirris did not simply scale up a lightweight bicycle shock. Its 16 mm hardened shaft, 38 mm high-flow piston, R46-spec reservoir system, separate high-speed and low-speed compression controls, and model-specific CMX damping tune give the E Ride Pro SR a more planted, controlled feel when the terrain gets fast or rough.\u003c\/p\u003e\n\u003cp\u003eFor riders pushing higher speeds, larger jumps, rough trails, or repeated hard impacts, the extra oil flow and heat management help reduce damping fade. The adjustable compression, rebound, and preload settings also allow the suspension to be dialed in for rider weight, terrain, and riding style instead of settling for a one-setting-fits-all shock.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eBest Fit for These Riders\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAggressive E Ride Pro SR riders who need better control through jumps, braking bumps, rocks, and repeated hard hits\u003c\/li\u003e\n\u003cli\u003eHeavier or faster riders who regularly overwhelm the consistency and heat capacity of smaller stock-style shocks\u003c\/li\u003e\n\u003cli\u003eRiders building a balanced compact motocross setup with the Sirris F43 CMX fork, R38-specific Prickly linkage, and optional CMX fork drop clamp\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sirris Store","offers":[{"title":"Medium (140-180 lb) \/ CMX \/ 2SC","offer_id":52187777499426,"sku":"238-99-004-MED-SR, R38, E-RIDE PRO SR, MEDIUM","price":899.0,"currency_code":"USD","in_stock":true},{"title":"Heavy (180-220 lb) \/ CMX \/ 2SC","offer_id":52187777532194,"sku":"238-99-004-HVY-SR, R38, E-RIDE PRO SR, HEAVY","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-eridepro-sr_f7f3490c-7dae-4c6e-a5d0-f78c0a96522d.jpg?v=1784824923","url":"https:\/\/revrides.com\/products\/r38-2sc-e-ride-pro-sr","provider":"REVRides","version":"1.0","type":"link"}