Progressive Suspension PS1145 Fork springsRef : PRSU00164A / PS1145

Progressive Suspension Fork Springs (manufacturer part no. 11-1145) — Replace your fork springs with a pair designed to provide progressive response and riding comfort suitable for roadsters, touring bikes, and vintage machines. The progressive windings offer a soft initial section to absorb small irregularities, then gradually stiffen to limit bottoming out during heavy compressions.

• Outer diameter: 34.00 mm (1.35")
• Length: 457.00 mm (18.00")
• Spring rate: 0.71 - 1.16 kg/mm (40 - 65 lb/in)
• Supplied unit: pair
• Includes a spacer of 10.00"
• Made in the USA

These springs maintain the original geometry while contributing to more predictable handling and improved compression behaviour. They are particularly suitable for road, touring, and classic builds where both comfort and fork control are sought. Professional installation is recommended to ensure proper fitting and adjustment of the spacer.

Examples of applications: TRIUMPH Speedmaster 865 (2016), KAWASAKI VN 900 Vulcan Custom (2014), SUZUKI GSX 750 F (2006). Manufacturer part no.: 11-1145.