Manufactured from the finest materials availableDesigned specifically for Harley models412 Series steel spring shocks are nitrogen gas-charged with multi-stage automatic valving and an adjustable spring preload; proven under extensive testing; easily installed; available in all black or with chromed springs and end caps (shock cartridge is not chrome)Available in standard shocks for the average single rider or heavy-dutyHeavy duty applications are recommended for bikes that are operated at or near the manufacturer's maximum load rating over 50% of the timeShock absorbers carry a one-year limited warranty; shock springs have lifetime warrantiesNOTE: All shocks are measured center-of-eyelet to center-of-eyelet.NOTE: CHR denotes chrome shock part numbers; BLK denotes black shock part numbers.NOTE: When installing shocks on 79-85 XL models, it may be necessary to modify or space the chain/belt guard to allow proper clearance.NOTE: A shock which is slightly longer than stock may alter the head angle slightly and provide somewhat quicker steering.NOTE: A shock which is slightly shorter than stock may alter the head angle slightly and provide somewhat slower steering.NOTE: For OEM shock lengths, see Quick Reference Guide in the back of the FatBook.NOTE: Some or all shocks listed have TüV approval. Refer to most recent TüV certificate for current listing.NOTE: Before 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 contact.