B8 5125 Universal Road Shock - for 12-13" Travel Stem to Eyelet - (Single)

Features:

• Supports 12-13" travel stem to eyelet 
• Monotube gas pressure construction
  
• Self-adjusting deflecting disc valving
• High-flow piston enhances ride comfort
• Independent rebound and compression control
• Large piston area improves damping precision
• Optimized for oversized tires and weight
• Ideal for aggressive off-road use
• Custom fit by travel length
• Reliable performance in harsh conditions

Built for Big Travel and Bigger Adventures

If you're building a rig that sees serious off-road time, the Bilstein 33-230436 5125 Series shock is made to handle it. With a full 12-13" inches of travel, this shock is a great fit for custom long-travel setups where articulation and stability are critical. Whether you're tackling technical climbs, fast desert sections, or just need more flexibility from your suspension, this shock brings that extra range without compromising durability. It’s built around Bilstein’s proven monotube gas pressure design, which helps deliver consistent damping performance no matter how rough the ride gets or how long you’ve been on the trail.

Smooth Action, Tuned for Control

What really stands out with this shock is how smoothly it manages unpredictable terrain. The self-adjusting disc valving keeps the response fluid and in tune with changing surfaces, so the truck stays composed even when things get rough. A high-flow piston moves oil more efficiently, which reduces impact harshness and helps prevent overheating over long distances. The larger piston area provides more accurate damping control, which becomes especially important when you’re running large tires or extra weight. With tuning that separates rebound from compression, the shock adapts better to different driving loads and conditions. Because it's sold by travel length, it's perfect for dialing in a custom suspension setup that fits your exact needs, whether that’s for overland travel, rock crawling, or high-speed runs across open terrain.

Fits: Universal

Notes:

• Universal shock for custom applications. Verify measurements before ordering.
• Designed for vehicles without a direct Bilstein fitment.
• Confirm your suspension uses a stem upper mount and 5/8 inch eye lower mount.
• Check collapsed and extended lengths to prevent binding or overtravel.
• Sold individually. Order two for a complete axle replacement.
• Medium factory valving is non-adjustable.
• Includes standard 5/8 inch hourglass bushings and a black bellows boot.
• No reservoir or spring seat is included.
• Replacement mounting kit is Bilstein part number B4-KT1-Z103A02.
• Fits by shock dimensions, not by vehicle application.
• Designed for custom suspension builders and lifted truck applications.
• Covered by Bilstein's 90-day manufacturer warranty against defects.
• Product images may be representative.

Install Instructions