Lewis AE 4-Piston Hydraulic Bicycle Disc Brake Kit, Front & Rear, 4-Piston Calipers

These are NOT for a SURRON or Talaria. These are configured for mountain bikes with a right lever rear brake configuration. Experience next-level stopping power with the Lewis AE Axial Cylinder 4-Piston Hydraulic Disc Brake Kit. Built on a proven platform and elevated with premium materials, the Lewis AE is engineered from aerospace-grade 7075 aluminum in a one-piece CNC-machined caliper design for unmatched strength and rigidity. Whether you’re railing berms, charging rock gardens, or pointing straight downhill, the AE’s rock-solid lever feel and precise modulation inspire confidence on any trail.The redesigned AE brake lever delivers a firmer, more substantial feel compared to the LH series, perfect for riders who prefer stronger feedback at the lever. Think of Shimano-style engagement versus SRAM — the AE is tuned for that confident, predictable bite. Integrated CNC calipers and an asymmetric piston layout (2 × 14 mm + 2 × 17 mm) provide even pad wear, a perfectly linear lever pull, and extended maintenance intervals. An upgraded master cylinder paired with durable braided hoses ensures crisp engagement with minimal flex, while four sealed bushings inside the lever pivot keep the feel silky-smooth ride after ride.With an optimized combination of modulation, power, and durability, the Lewis AE is ready for any challenge, from XC to enduro to downhill. Pre-bled and ready to mount, it’s the easiest upgrade you’ll make to elevate your ride.What’s in the Box:Front & Rear AE Caliper + Lever Assemblies — pre-bled and ready to installSecure Stainless Steel Mounting Hardware — bolts and washers included90 cm Front / 165 cm Rear Brake Hoses — trim-to-length for a perfect fitPremium TP-37 Brake Pads — high-temp metallic compound for consistent biteComprehensive User Manual — step-by-step installation and maintenance tipsWhy You’ll Love It:Unrivaled Modulation — consistent linear feel through every inch of lever travelBulletproof Durability — forged 7075 aluminum caliper and stainless hardware stand up to harsh conditionsTool-Free Adjustability — change lever reach or pad contact without any extra toolsLow Maintenance — integrated caliper design with high-quality seals for extended bleed intervalsVersatile Performance — perfect for trail, enduro, downhill, or XCTechnical Specifications:Master Cylinder: Axial, single clamp, tool-free reach adjustPistons: 2 × 14 mm + 2 × 17 mm stainless steelLever Blade: 1-finger, CNC 7075 aluminum with sealed bearing pivotCaliper Mount: Post-mount compatibleHose: 5 mm outer diameter / 2.2 mm inner diameter braided oil lineBrake Fluid: Mineral oil (DOT-compatible)Pad Compound: TP-37 metallic (semi-metallic LP-37 optional)Weight: 220 g per side (lever + caliper)Use Case: Enduro, XC, Trail, DownhillUpgrade your ride with the Lewis AE — precision stopping power engineered for the most demanding trails. Hit “Add to Cart” now and feel the difference on your very next ride.

• They are configured as right lever = rear brake and left lever = front brake!
• Powerful 4-Piston Braking – The Lewis AE disc brake kit features four-piston calipers for powerful, consistent braking performance on aggressive trail and enduro riding.
• Pre-Bled & Ready to Install – Arrives pre-bled and fully assembled with hoses connected, saving you time and frustration.
• Fully Adjustable Feel: Tool-free lever reach and bite point adjustment let you customize braking response for comfort and control. Paired with Lewis' patented dual adjustment system for reach and bite point, it ensures powerful braking without compromising ergonomic comfort.
• Lightweight Design – Forged calipers and a lightweight master cylinder reduce system weight while maintaining robust durability.
• Kevlar-Reinforced Brake Hose: Pre-cut T200 Kevlar hoses withstand high pressure while offering a smooth lever feel. This design ensures a precise, consistent braking feel, enhancing the overall control and functionality of the braking system.
• All-In-One Kit: Includes front & rear calipers and levers, hoses, pads, mounting hardware, olive kits, and adjustment tool.