Rancho Suspension Suspension Leaf Spring Block Kit

Rancho Suspension Leaf Spring Block Kits: Precision Lift from a Proven Off-Road Leader

Rancho Suspension has been engineering performance suspension solutions since 1955, when founder Clarence Shook launched Rancho Jeep Supply in Southern California to serve the growing community of 4WD desert enthusiasts. Today, that same passion for off-road capability drives every product Rancho engineers — including their purpose-built Suspension Leaf Spring Block Kits.

For truck and SUV owners who want to extract more capability from a leaf-spring rear suspension, a block kit is one of the most direct upgrades available. Rather than replacing the entire spring pack, a leaf spring block kit is installed between the axle and the leaf spring to add rear lift height — creating clearance for larger tires and correcting the factory rake that many trucks carry from the factory. Rancho's application-specific approach means each kit is engineered to match your vehicle's OEM geometry rather than being a generic one-size-fits-all solution.

What Makes Rancho Leaf Spring Block Kits Stand Out

Application-specific engineering is at the core of Rancho's leaf spring block kit lineup. Rather than a universal block, Rancho designs each kit to fit the dimensions and load ratings of specific truck platforms — including popular models like the Ford F-150 — ensuring proper axle alignment and pinion angle after installation.

• Black polyurethane construction: Rancho leaf spring block kits are sold in pairs, with blocks manufactured in black polyurethane for durability and resistance to the elements.
• Zinc-coated hardware included: Each kit comes complete with rear blocks, coated U-bolts, and hardware — with zinc-coated U-bolts that resist rust and corrosion over time.
• Rear lift for larger tire fitment: Rancho's block kits are designed to raise the rear of the vehicle to accommodate larger wheel and tire combinations, making them a natural complement to a front leveling or lift system.
• Complete kit convenience: Hardware is included so you have everything needed for installation without sourcing parts separately, reducing the chance of a mismatched assembly.
• Limited lifetime warranty: Rancho backs its leaf spring block kits with a limited lifetime warranty, reflecting the brand's confidence in long-term durability.

Part of a Bigger Suspension Story

Rancho's leaf spring block kits are designed to pair naturally with other Rancho lift and leveling products. The brand recommends combining them with components like the Rancho RS9000XL or RS5000X rear shocks, quickLIFT front assemblies, or LEVEL IT systems for a comprehensive suspension upgrade. This system-level thinking — where individual components are engineered to work together — is a hallmark of Rancho's decades-long approach to suspension design.

Whether you're correcting rear squat on a work truck, clearing room for oversized all-terrain tires, or building toward a more aggressive lifted stance, Rancho's Suspension Leaf Spring Block Kits offer a reliable, application-matched foundation. Browse the full selection below, and explore the complete Rancho Suspension catalog or the broader Suspension Leaf Spring Block Kit category for more options.