{"product_id":"hayes-dominion-a4-srl-disc-brake-lever-dbkl0253-mtb-flat-bar-disc-brakes","title":"Hayes Dominion A4 SRL Hydraulic Disc Brake Rear - Four-Piston, Post Mount, Stealth Black - Gray, High-Performance Enduro \u0026 Downhill Brake System","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eExperience superior braking performance with the Hayes Dominion A4 Disc Brake and SRL Lever - the ultimate choice for aggressive downhill, enduro, and trail riding. Engineered with innovative features and top-tier materials, this hydraulic disc brake system guarantees precise control, consistent stopping power, and durability in demanding conditions.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eMaterials \u0026amp; Construction\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eBuilt with a robust post-mount caliper design, the Hayes Dominion A4 features a high-strength aluminum caliper body, ensuring lightweight durability without compromising stiffness. The included Hayes K2 Kevlar weave hose offers unrivaled stiffness for maximum power transmission, while high-quality DOT 5.1 brake fluid provides high boiling points for reliable performance under intense heat.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003ePerformance \u0026amp; Engineering\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003eDesigned specifically for downhill and enduro riders, the four-piston caliper delivers powerful, predictable braking force with minimal effort. The short reach SRL lever is ergonomically tailored for smaller hands, offering a comfortable grip and enhanced modulation. Factory-tuned to reduce dead stroke, the caliper ensures a crisp bite point and immediate response, making aggressive descents safer and more controlled.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003eComponents \u0026amp; Technology\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003eThe Dominion A4 features QuickBite2 pad compounds-semi-metallic T106 for standard conditions and sintered T100 for wet, muddy, or challenging terrain-paired with Hayes D-series rotors (sold separately) for rapid, consistent braking across temperature ranges. The included pre-bled, assembled hydraulic system simplifies installation and maintenance, ensuring top performance with minimal setup.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003eStyle \u0026amp; Use Case\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003eSporting a stealth black and gray finish, the Hayes Dominion A4 offers a sleek, professional aesthetic suited for aggressive mountain biking disciplines. Ideal for downhill, enduro, and trail riders seeking ultimate braking control, this brake system excels in technical descents and high-speed rides where reliability and modulation are critical.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eInnovative \u0026amp; Differentiating Features\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-11\"\u003e\u003cp\u003e- Low-effort SRL lever for ergonomic comfort and precise modulation, especially suited for smaller hands\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-12\"\u003e\u003cp\u003e- Factory-prebled Hayes K2 Kevlar hose for maximum stiffness and power efficiency\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-13\"\u003e\u003cp\u003e- QuickBite2 pad technology with dual compounds for optimal performance in diverse conditions\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-14\"\u003e\u003cp\u003e- Adjustable reach for customized fit and control\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-15\"\u003e\u003cp\u003e- High-temperature DOT 5.1 hydraulic fluid for consistent performance under intense use\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-16\"\u003e\u003cp\u003eNote: Rotors and adapters are sold separately (Part# HY-8708\/10\/12).\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-17\"\u003e\u003cp\u003eUpgrade your mountain bike braking system with the Hayes Dominion A4 Disc Brake and SRL Lever for unmatched braking power, control, and durability on every adventure. Optimized for search engines and designed to convert, this component is essential for serious riders demanding the best in hydraulic disc brake technology.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eExperience superior stopping power with the Hayes Dominion A4 SRL Disc Brake, crafted from durable and lightweight materials for aggressive downhill and enduro riding. \u003c\/li\u003e\n\u003cli\u003eEngineered with four high-performance pistons and advanced hydraulic technology, this brake delivers consistent, fade-free braking regardless of temperature or terrain conditions. \u003c\/li\u003e\n\u003cli\u003eFeaturing Hayes' proprietary QuickBite2 pad compounds and woven Kevlar K2 hose, the system ensures rapid pad engagement and maximum power transmission for precise control on every ride. \u003c\/li\u003e\n\u003cli\u003eDesigned specifically for small hands, the Short Reach Levers provide ergonomic comfort and effortless modulation, making technical descents more manageable and comfortable. \u003c\/li\u003e\n\u003cli\u003eBuilt in stealth black\/gray with adjustable reach and compatible with 74mm post mount calipers, this rear hydraulic brake system is ideal for riders seeking durability, control, and style in demanding trail and downhill applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Hayes","offers":[{"title":"Default Title","offer_id":42353721573443,"sku":"DBKL0253","price":249.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/BR1665.jpg?v=1780006831","url":"https:\/\/365cycles.com\/products\/hayes-dominion-a4-srl-disc-brake-lever-dbkl0253-mtb-flat-bar-disc-brakes","provider":"365 Cycles","version":"1.0","type":"link"}