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Progressive Fork Springs For Harley Sportster / Street 2004-2016

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Progressive Suspension Fork Springs For Harley Sportster / Street

The 'Original' progressive-rate fork springs soak up small road bumps, yet are firm enough to absorb the molar-rattlers. Spring rates have been chosen to reduce front end "dive" during braking, yet still provide excellent ride comfort. A progressive-rate spring has the advantage of a resistance to compression that rises as the spring is being compressed - it gets tougher to compress as it is compressed. The benefit of this is that the spring can be soft enough at the start of the travel to offer a "plush" ride, yet be firm enough at the end of the travel to soak up the big bumps.


  • Progressive spring rate
  • High-quality chrome-silicon wire
  • Precision wound
  • Made in USA

Fitment Notes & Exceptions

  • Changing ride height can potentially change many carefully-engineered attributes of your bike, including trail and mechanical trail
  • A change in ride height at one end of the vehicle usually will require a change at the other end
  • Heavy Duty shocks are recommended for bikes operated at or near the OEM maximum load rating over 50% of the time
  • Prior to purchasing springs that are different than your OEM length, please verify that wheel and suspension travel can be altered without causing clearance issues - common interference spots include triple trees, fenders, frame, and of course, the ground
This Product Fits:
Harley Davidson
Sportster Custom XL1200C 20042016
Sportster Custom XL883C 20042009
Sportster Forty-Eight XL1200X 20102015
Sportster Iron XL883N 20092016
Sportster Low/SuperLow XL883L 20052016
Sportster Low XL1200L 20042011
Sportster Nightster XL1200N 20072012
Sportster Roadster XL1200R 2004, 2005, 2006, 2007, 2008
Sportster Roadster XL883R 20042012
Sportster Seventy-Two XL1200V 2012, 2013, 2014, 2015, 2016
Sportster SuperLow XL1200T 2014, 2015, 2016
Sportster XL883 20042009
Street 500 XG500 2015, 2016
Street 750 XG750 2015, 2016
Product Style RevZilla Item # Manufacturer Product # Availability
Stock Length 902991 11-1527/111527 In Stock: Ships next business day


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Write a Product Review for a chance to win our monthly $100 giveaways.
Progressive Fork Springs For Harley Sportster / Street 2004-2016 5 5 3 3
100% better than stock Installed these with RSD preload adjusters, couldn't ask for a better ride. No more broken spine over bumps! September 7, 2015
Nightster Upgrade Upgraded front and rear with progressive suspension and I couldn't be happier. Better handling, smoother, built for adventure and comfort. yeah buddy August 3, 2015
Great Springs Just put these in my Iron 883. Wow! What a difference. The front feels like a sportbike. The stock springs looked so weak compared to these. No more bottoming out :) It also lifted my front end because there is why less sag. I lifted the rear with 12" 412s as well and now my bike can lean much more than before! Way better ride as well. August 1, 2014
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Progressive Fork Springs For Harley Sportster / Street 2004-2016
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RevZilla Store asked: Why did you choose this?
WIlliam M: These were recommended by a professional moto-x rider to me. Jul 20, 2014