Universal Parts #428H Chain Offset Link / Half-Link

Achieve the ideal chain slack with the Universal Parts #428H Offset Link (also known as a half-link). This specialized drivetrain component solves the common problem where removing a full link makes the chain too short, but leaving it in makes it too loose. Engineered for high-stress applications, this link adjusts your wheelbase by a half-pitch (~6.35mm), ensuring smooth power delivery and reduced sprocket wear.

Model Compatibility

Compatible with any #428 or #428H roller chain. Typical applications include:

• Pocket Bikes & Pit Bikes — adjusting tension after sprocket swaps or engine moves
• ATVs & Dirt Bikes — 50cc–150cc models using 428-series drive systems
• Custom Motorcycles — fine-tuning rear wheel alignment and chain slack
• Gas-powered scooters and mini-bikes with 428-pitch drive systems

Key Features

• High-Tensile Strength: Ultimate tensile strength of 20.60 kN (4,682 lbs) — fully rated for Heavy Duty "H" series chains.
• Precision 428H Geometry: 12.70mm pitch and 8.51mm roller diameter for seamless interface with any 428-series drive system.
• Reinforced Plate Thickness: 2.03mm plates match the durability of your primary drive chain.
• Includes Cotter Pin: Ready to install out of the package.

Technical Specifications

• Chain Size: #428H (Heavy Duty)
• Pitch: 12.70mm
• Roller Diameter: 8.51mm
• Width Between Inner Plates: 7.85mm
• Pin Diameter: 4.45mm
• Pin Length: 18.80mm (LC: 19.9mm)
• Inner Plate Depth: 11.80mm
• Plate Thickness: 2.03mm
• Ultimate Tensile Strength: 20.60 kN / 4,682 lbs
• Average Tensile Strength: 23.4 kN
• Weight per meter: 0.79 kg/m
• SKU: 115-48 | MPN: 428H O/L

Mechanic's Note: An offset link is the right call when your chain adjusters are at their limit. Always ensure the cotter pin is fully seated before riding — chain links are under extreme tension.

California Prop 65 Warning: www.p65warnings.ca.gov

• Heavy-duty #428H rated — 20.60 kN / 4,682 lbs tensile strength
• Precision 12.70mm pitch for seamless 428-series fitment
• 2.03mm reinforced plate thickness for durability
• Adjusts chain by half-pitch (~6.35mm) for perfect tension
• Includes cotter pin — ready to install

SKU: 115-48 | MPN: 428H O/L | Chain Size: #428H | Pitch: 12.70mm | Roller Dia: 8.51mm | Pin Dia: 4.45mm | Plate Thickness: 2.03mm | UTS: 20.60 kN / 4,682 lbs

Any #428 or #428H roller chain — Pocket Bikes, Pit Bikes, ATVs, Dirt Bikes (50cc–150cc), Custom Motorcycles