PROGRESSIVE SUSPENSIONPart Number : PR-490-1003 PR-490-1003 True sport performance shocksFeature a high-pressure monotube with deflective disc-damping technology, hand threaded pre-load and rebound adjustmentLinear rate spring allows riders to fine tune the damping and consistently withstand extreme temperature ranges and heavy loadsEngineered jounce bumper and cup also help smooth out and control bottomingMade in the U.S.AAll shocks are measured centre-of-eyelet to centre-of-eyeletA shock which is slightly longer than stock may alter the head angle slightly and provide somewhat quicker steeringA shock which is slightly shorter than stock may alter the head angle slightly and provide somewhat slower steeringFor OEM shock lengths, see Quick Reference Guide in the back of the catalogueHeavy Duty Applications are recommended for bikes that are operated at or near the manufacturer's maximum load rating over 50% of the timeBefore purchasing or attempting to install shocks that are different than the OEM length, confirm that your wheel travel can be altered without causing clearance issues, such as swingarm/axle to exhaust contact as well as chain/belt guard or tire contract FITMENT INFORMATIONXL 1200 C Sportster Custom (2004-2020)XL 1200 C Sportster Custom 110th Anniversary (2013)XL 1200 CX Sportster Roadster (2016-2020)XL 1200 L Low (2006-2011)XL 1200 N Nightster (2007-2012)XL 1200 NS Sportster Iron (2018-2021)XL 1200 R Roadster (2004-2008)XL 1200 T Sportster Superlow (2014-2020)XL 1200 V Seventy-Two (2012-2016)XL 1200 X Forty-Eight (2010-2022)XL 1200 X Sportster Forty-Eight Anniversary (ANX) (2018)XL 1200 XS Sportster Forty-Eight Special (2018-2020)XL 883 Sportster (2004-2009)XL 883 C Sportster Custom (2004-2010)XL 883 L Low (2005-2010)XL 883 L Sportster SuperLow (2011-2020)XL 883 N Iron (2009-2022)XL 883 R Roadster (2004-2015)XL50 1200 50th Anniversary (2007).