{"product_id":"brocks-performance-long-attack™-swingarm-extended-4-8-black-for-h-d-touring-models-09-26","title":"Brock's Performance Long ATTACK™ Swingarm Extended 4\"-8\" (Black) for H-D Touring Models (09-26)","description":"\u003cp\u003e\u003cstrong\u003eATTACK™ Swingarm Series:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat do you get when you combine decades of sportbike drag racing development with the unique traction challenges of a Harley-Davidson bagger?\u003c\/strong\u003e \u003cem\u003eIntroducing the ATTACK™ Swingarm series by Brock’s Performance.\u003c\/em\u003e Our ATTACK™ Swingarms use an offset pivot design to create a higher effective pivot point, increasing swingarm attack angle and anti-squat so the rear tire is driven into the surface under power instead of being unloaded as the bike squats.\u003c\/p\u003e\n\u003cp\u003eThat added geometry advantage is especially valuable on a Harley-Davidson chassis because the swingarm pivot passes through the transmission\/primary structure, leaving no practical way to raise the pivot the way engineers can on a modern sportbike. The ATTACK™ Swingarm builds that benefit directly into the swingarm itself, delivering improved bite, better chassis attitude under acceleration, and more usable traction for stock engine, big-inch, turbo, and nitrous applications alike.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLong ATTACK™ Swingarm:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBuilt for riders with serious power and looking for maximum straight-line stability, the Long ATTACK™ Swingarm from Brock’s Performance is designed for +4 to +8 inch applications, with a pivot centerline to axle-slot centerline range of 21.5 inches (546.0 mm) to 25.5 inches (647.7 mm).\u003c\/p\u003e\n\u003cp\u003eThe Long ATTACK™ is a purpose-built long-bike solution that combines the offset pivot geometry with added length, creating a package designed to help most demanding drag-race, big-inch, turbo, and nitrous applications leave harder, track straighter, and stay calmer when the throttle is applied aggressively. This is ideal for riders looking to improve stability and help manage wheelies in a package that combines traction, stability, and chassis control in straight-line environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e The Long ATTACK™ Swingarm \u003cstrong\u003e\u003cspan style=\"text-decoration: underline;\"\u003eIS NOT\u003c\/span\u003e a direct OEM replacement part\u003c\/strong\u003e. Extensive chassis modifications to the rear of the motorcycle are required to allow fitment of any swing arm extended more than 3 or 4\" (76.2mm-101.6mm). Always check for safe dynamic operating clearance when making chassis modifications.\u003c\/p\u003e\n\u003cp\u003e\u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/content\/images\/Long_ATTACK_Swingarm_Comparison_Chart_Revised_Zoom.jpg\" target=\"_blank\" rel=\"noopener\"\u003e\u003cstrong\u003eNot sure which ATTACK™ Swingarm is right for your build? View the ATTACK™ Swingarm Comparison Chart.\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e6061-T6 Aluminum swingarm handcrafted from proprietary extrusion\u003c\/li\u003e\n\u003cli\u003eBolt-on design can be used with OEM rear wheel, spacers, and associated components \u003cstrong\u003e*Extended belt or chain conversion, brake line, and aftermarket brake setup are required for this application*\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdjustable extended wheelbase: +4\" to +8” over applications\u003c\/li\u003e\n\u003cli\u003eDesigned for use in high-power, high-torque applications\u003c\/li\u003e\n\u003cli\u003eIncludes centerless ground hollow 4130 chromoly axle\u003c\/li\u003e\n\u003cli\u003eReversible billet aluminum axle adjusters for easy wheel adjustments\u003c\/li\u003e\n\u003cli\u003eIntegrated threaded mounts for optional \u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/vortex-10mm-swingarm-spools-black\/\" target=\"_blank\" rel=\"noopener\"\u003eswingarm spool\u003c\/a\u003e installation\u003c\/li\u003e\n\u003cli\u003eIncludes newly-revised caliper bracket for use with most \u003ca style=\"color: blue;\" href=\"https:\/\/blog.brocksperformance.com\/why-choose-worldwide-bearings\/\" target=\"_blank\" rel=\"noopener\"\u003eaftermarket brake caliper setups\u003c\/a\u003e\u003cstrong\u003e *See ‘Technical’ tab for details\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePTFE®-lined spherical bearings from \u003ca style=\"color: blue;\" href=\"https:\/\/blog.brocksperformance.com\/why-choose-worldwide-bearings\/\" target=\"_blank\" rel=\"noopener\"\u003eWorldwide Bearings\u003c\/a\u003e are preinstalled\u003c\/li\u003e\n\u003cli\u003eIncludes spacers to use the OEM 3\/4” pivot shaft\u003c\/li\u003e\n\u003cli\u003eInterior swingarm width measures 10 7\/8” at the axle \u003cem\u003e(accepts 200 series rear tire on 6.75” wide rim with chain conversion)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e36% weight savings vs OEM swingarm (see the 'technical' tab for details)\u003c\/li\u003e\n\u003cli\u003eDesigned, machined, and assembled in the USA\u003c\/li\u003e\n\u003cli\u003eBlack powder coated finish\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/content\/Instructions\/VTwin\/996915.pdf\" target=\"_blank\" rel=\"noopener\"\u003eClick here to view installation information\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/content\/Instructions\/VTwin\/996902.pdf\" target=\"_blank\" rel=\"noopener\"\u003eClick here to view the pivot bolt stack-up engineered drawing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e For long ATTACK swingarm owners using the OEM rear brake setup, it will be necessary to countersink one or both of the caliper mounting holes to maintain adjustability in the wheelbase \u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/content\/images\/West_Coast_Bagger_Swingarm_Caliper_Mount_Countersink.jpg\"\u003e(click here for more information)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOverall hub width is critical for proper operation\/handling. See the 'Technical' tab for \u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/content\/images\/Bagger_Swingarm_Stackup_Dimensions_Drawing.jpg\"\u003eimportant information\u003c\/a\u003e regarding installation\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"moretab\" data-title=\"Product Details\"\u003e\n\u003cp\u003e\u003cstrong\u003eShock\/Rear Brake Information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e3-position shock mounts allow flexibility in ride height (stock, -1\", -2\")\u003c\/li\u003e\n\u003cli\u003eBrock’s Performance recommends adjustable \u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/v-twin\/suspension\/rear-shocks\/\" target=\"_blank\" rel=\"noopener\"\u003eBitubo shocks\u003c\/a\u003e for the best performance and adjustability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr style=\"height: 1px; color: gray; width: 100%; align: left;\"\u003e\n\u003cp\u003e\u003cstrong\u003eAttack Bagger Swingarm Weight:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwingarm w\/Bearings:\u003c\/strong\u003e 12.50 lb. (5.67 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle w\/Nuts:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e25mm - 2.48 lb. (1.12 kg)\u003c\/li\u003e\n\u003cli\u003e28mm - 2.77 lb. (1.26 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle Blocks:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e25mm - 0.76 lb. (0.35 kg)\u003c\/li\u003e\n\u003cli\u003e28mm - 0.74 lb. (0.34 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePivot Bushings:\u003c\/strong\u003e 0.43 lb. (0.20 kg)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Mount w\/Screws:\u003c\/strong\u003e 0.55 lb. (0.25 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e25mm Total = 16.72 lb. (7.58 kg)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e28mm Total = 16.99 lb. (7.71 kg)\u003c\/strong\u003e\u003c\/p\u003e\n \n\u003cp\u003e\u003cstrong\u003eOEM Harley-Davidson® Swingarm Weight:\u003c\/strong\u003e 22.78 lb. (10.33 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Harley-Davidson® Axle Weight:\u003c\/strong\u003e 3.55 lb. (1.61 kg)\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTotal = \u003c\/strong\u003e 26.33 lb. (11.94 kg)\u003c\/p\u003e\n\u003cstrong\u003e   \u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eTotal Weight Savings =\u003c\/strong\u003e 9.61 lb. (4.36 kg) or 36% of OEM weight\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"moretab\" data-title=\"Technical\"\u003e\n\u003cp\u003e\u003cstrong\u003eAttention: When spacing the Bagger rear wheel, \u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/content\/images\/Bagger_Swingarm_Stackup_Dimensions_Drawing.jpg\"\u003ethe overall width\u003c\/a\u003e, including spacers, brake hanger, etc. Must be: 10.875 in +.020in\/-.000in \/ (276.22mm +.50mm\/-.00mm) \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOverall hub width is critical for proper operation\/handling, product longevity, and rider safety. Brock’s Performance \u003ca style=\"color: blue;\" href=\"https:\/\/blog.brocksperformance.com\/terms-and-conditions\/\"\u003ewill not warrant\u003c\/a\u003e any damaged swingarm found not to comply with these spacing guidelines.\u003c\/p\u003e\n\u003chr style=\"height: 1px; color: gray; width: 100%; align: left;\"\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"color: #ff0000;\"\u003e*\u003c\/span\u003eAttention\u003cspan style=\"color: #ff0000;\"\u003e*\u003c\/span\u003e\u003c\/strong\u003e When using an \u003ca style=\"color: blue;\" href=\"https:\/\/brocksperformance.com\/radial-rear-caliper-mounting-kit-natural-h-d-touring-09-25\/\" target=\"_blank\" rel=\"noopener\"\u003eaftermarket brake hanger\u003c\/a\u003e, care must be taken to ensure it does not bottom out on the supplied caliper mounting bracket. Failure to do so can lead to swingarm failure, loss of control, injury, and even death.\u003c\/p\u003e\n\u003chr style=\"height: 1px; color: gray; width: 100%; align: left;\"\u003e\n\u003cp\u003e\u003cstrong\u003eExhaust Clearance Note:\u003c\/strong\u003e Due to the offset pivot point and changes in suspension geometry, the swingarm sits at a greater downward angle (axle is lower than pivot shaft). Depending on the exhaust system used, additional clearance around the muffler may be required to clear the axle.\u003c\/p\u003e\n\u003chr style=\"height: 1px; color: gray; width: 100%; align: left;\"\u003e\n\u003cp\u003e\u003cstrong\u003eAmerican V-Twin Fitment Statement:\u003c\/strong\u003e\u003cbr\u003eAlthough all attempts have been made to handcraft a product that will fit a wide variety of machines for a particular make\/model\/year, due to idiosyncrasies between particular years, available options, accessories, etc., fitment cannot be 100% guaranteed. If, upon assembly, fitment issues are discovered that are beyond the installer's ability or willingness to correct, then please feel free to contact our customer service department, alert Brock’s Performance to the fitment issue for your particular make\/model, and obtain an RMA (Return Material Authorization). Brock’s Performance will accept unmodified swingarms in 100% resalable condition for a full refund.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003ePlease note that refunds are issued after product inspection at Brock’s Performance, and the customer is responsible for any\/all shipping charges.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n        \n","brand":"Brock's Performance","offers":[{"title":"Axle with Blocks 25mm","offer_id":44177652744279,"sku":"605518-25489","price":1829.0,"currency_code":"USD","in_stock":true},{"title":"Axle with Blocks 28mm","offer_id":44177652777047,"sku":"605518-25490","price":1829.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/7099\/2215\/files\/29099_605518_Long_ATTACK_Bagger_Swingarm_Black_HD_Touring_1_Zoom__58480.1784057648.500.750__57885.1785864085.jpg?v=1787134199","url":"https:\/\/westfieldmoto.com\/products\/brocks-performance-long-attack%e2%84%a2-swingarm-extended-4-8-black-for-h-d-touring-models-09-26","provider":"Westfield Moto Works","version":"1.0","type":"link"}