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39/49mm KB Cartridge Style Fork Spring Kit

39/49mm KB Cartridge Style Fork Spring Kit

Regular price $277.95 USD
Regular price Sale price $277.95 USD
Sale Sold out

Reduce front end dive under braking for ultimate ride control with the Bitubo Cartridge Style Fork Spring Kit. Optimize ride comfort with fine tune preload adjustment featuring 10 turns/10mm on both top caps. Included in each box is two cartridge style fork caps, fork springs, Lowering Kit, install sheet and preload adjustment tool.

Bitubo has combined generations of family race-proven experience to create a High-Performance World Champion Cartridge Style Fork Spring Kit for your Harley-Davidson! 100% rebuild-able, up to 30 mm of ride height adjust-ability depending on the application.Plug & Play fitment drops right into standard forks with installation instructions and necessary hardware included. Like all Bitubo products, the KB can be completely rebuilt, serviced and is covered by a Long-Life Warranty.


  • Length
  • Spring Preload

BOX INCLUDES: Installation instructions, lowering kit and Pre-load Adjustment Tool.


  • 2011-2013 Touring Models
  • 2004-2021 Sportster Models
  • 2018-Current M8 Softail Models
  • 2006-2010 V-Rod Models
  • 1983-1994 FXR Models (Coming Soon)


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Care Instructions

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Long Life Warranty

The Warranty may be extended beyond the first 24 months for the following 24 months or for up to a maximum of 6 years only if a periodic overhaul is carried out by an authorized technical center.