{"product_id":"f43-cmx-tune-tool-free-lsc-220-mm-travel-arctic-leopard-xe-pro-r","title":"Sirris CMX Tune F43 Fork | Arctic Leopard XE Pro R","description":"\u003ch1 style=\"text-align: center;\"\u003eSirris CMX Tune F43 Fork | Arctic Leopard XE Pro R\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eSirris CMX Tune F43 Fork\u003c\/strong\u003e is a serious suspension upgrade built for riders pushing the Arctic Leopard XE Pro R harder than a standard fork was designed to handle. With \u003cstrong\u003e220mm of travel, 43mm high-tensile steel stanchions, a symmetrical closed-cartridge damping system, hydraulic bottom-out control, and billet aluminum triple clamps\u003c\/strong\u003e, the F43 is designed around control, consistency, and durability at higher speeds and under heavier impacts.\u003c\/p\u003e\n\u003cp\u003eThe CMX, or \u003cstrong\u003eCompact Motocross Tune\u003c\/strong\u003e, gives the F43 a performance-focused setup for aggressive trail riding, jumps, hard braking, rough terrain, and repeated high-speed hits. Sirris uses separate lubrication and damping oil circuits, high-flow pistons, tunable compression and rebound valving, and a spring-backed modified IFP to keep the fork predictable as riding intensity increases.\u003c\/p\u003e\n\u003cp\u003eFor the \u003cstrong\u003eArctic Leopard XE Pro R\u003c\/strong\u003e, Sirris includes the required wheel spacers and a 240mm rotor brake bracket. Replaceable caliper mounting brackets also give riders more flexibility for future brake, caliper, rotor, and wheel upgrades.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eRider Weight \u0026amp; Spring Options\u003c\/h2\u003e\n\u003cp\u003eSirris offers two rider weight ranges when selecting the CMX Tune F43. 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, 4.0 \/ 3.6 springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180 lbs to 220 lbs:\u003c\/strong\u003e Heavy, 4.0 \/ 4.0 springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eFork spring rates are listed as left side \/ right side.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eFork Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eArchitecture:\u003c\/strong\u003e Upside-down fork\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel:\u003c\/strong\u003e 220mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Length:\u003c\/strong\u003e 775mm, 800mm total length with drop clamp\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFork Spacing:\u003c\/strong\u003e 178mm, allowing extensive dirt or street tire options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFork Weight:\u003c\/strong\u003e 4 kg per leg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStanchions:\u003c\/strong\u003e 43mm high-tensile steel with hard chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Tubes:\u003c\/strong\u003e Seamless 7050 aluminum with Type 3 hard-anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDropouts:\u003c\/strong\u003e 6061 aluminum with Type 2 anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Mounting:\u003c\/strong\u003e Sized for 240mm rotors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Bracket:\u003c\/strong\u003e 240mm rotor brake bracket included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle:\u003c\/strong\u003e Custom ultra-stiff, race-grade, ultra-high-tensile hard-chromed axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTriple Clamps:\u003c\/strong\u003e Drop clamp, billet 6061 aluminum, Type 2 anodized coating, black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteer Tube:\u003c\/strong\u003e Seamless 7050 aluminum with Type 2 anodized coating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Mount:\u003c\/strong\u003e 4-bolt direct-mount stem only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeals:\u003c\/strong\u003e NOK MX seals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBushings:\u003c\/strong\u003e Daido MX bushings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuards:\u003c\/strong\u003e High-impact PP with 210-degree wraparound coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eCMX Closed-Cartridge Damping\u003c\/h2\u003e\n\u003cp\u003eThe F43 uses Sirris' \u003cstrong\u003eCMX Tune symmetrical closed-cartridge system\u003c\/strong\u003e with a spring-backed modified IFP. High-flow pistons and fully tunable compression and rebound valving give riders more control over how the fork reacts to braking, repeated impacts, jumps, and changing terrain.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Oil Circuits:\u003c\/strong\u003e Separate lubrication and damping oils help optimize both high-speed and low-speed damping performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic Bump Stop:\u003c\/strong\u003e Hydraulic bottom-out control helps soften hard landings while allowing riders to use the available fork stroke.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDamper Bodies:\u003c\/strong\u003e Seamless 7050 aluminum with Type 3 hard-anodized coating for durability and scratch resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRebound:\u003c\/strong\u003e Dual-side high-tensile steel spring, adjustable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustments:\u003c\/strong\u003e External compression and rebound adjustment. Compression is tool-free, while rebound adjustment requires a tool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Cap System:\u003c\/strong\u003e Motorcycle-style top cap provides more consistent control over steering bearing tension.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"text-align: center;\"\u003eBuilt for Hard Riding\u003c\/h2\u003e\n\u003cp\u003eAt \u003cstrong\u003e4 kg per fork leg\u003c\/strong\u003e, the F43 is not designed around being the lightest fork possible. Its sturdy construction is intentional, giving the front end the strength and rigidity needed to deal with the forces, speeds, braking loads, and impacts generated by the high-performance Arctic Leopard XE Pro R. The custom race-grade axle further increases front-end stiffness to improve steering precision and rider confidence.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e178mm fork spacing\u003c\/strong\u003e also leaves plenty of room for tire selection, whether the XE Pro R is being built around an aggressive dirt setup or a street-oriented wheel and tire combination. Replaceable caliper mount brackets add another level of flexibility for riders planning future brake or wheel upgrades.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eFitment\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eArctic Leopard XE Pro R\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Note:\u003c\/strong\u003e Arctic Leopard XE Pro R wheel spacers and a 240mm rotor brake bracket are included.\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003eWho Is the F43 For?\u003c\/h2\u003e\n\u003cp\u003eThe Sirris F43 makes the most sense for Arctic Leopard XE Pro R riders who are starting to find the limits of the stock front suspension. Its combination of \u003cstrong\u003e220mm travel, closed-cartridge damping, hydraulic bottom-out control, 43mm stanchions, NOK MX seals, and Daido MX bushings\u003c\/strong\u003e is particularly useful when consistent damping and front-end control matter more than simply reducing weight.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAggressive trail and enduro riders\u003c\/strong\u003e dealing with rocks, roots, braking bumps, drops, and technical terrain.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJump and track riders\u003c\/strong\u003e who need better bottom-out control and consistent damping through repeated hard impacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-performance Arctic Leopard XE Pro R builds\u003c\/strong\u003e where increased speed, braking force, larger tires, or upgraded brakes demand a stronger and more tunable front suspension setup.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Sirris Store","offers":[{"title":"Medium (140-180 lb) \/ CMX - Drop Clamp \/ Black","offer_id":52573114827042,"sku":"430-99-039-MED-02-DROP-F43-775X220-ARCTICLEOPARD-XEPROR-BLACK","price":2350.0,"currency_code":"USD","in_stock":false},{"title":"Heavy (180-220 lb) \/ CMX - Drop Clamp \/ Black","offer_id":52573114859810,"sku":"430-99-039-HEAVY-02-DROP-F43-775X220-ARCTICLEOPARD-XEPROR-BLACK","price":2350.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0093\/1672\/8892\/files\/sirris-F43-220-arcticleopard-r-fork-front-CMX-black.jpg?v=1789667268","url":"https:\/\/revrides.com\/products\/f43-cmx-tune-tool-free-lsc-220-mm-travel-arctic-leopard-xe-pro-r","provider":"REVRides","version":"1.0","type":"link"}