This Heavy Duty version of the 'Original' Progressive Rate Fork Springs soak up the small road bumps, and improve front end stability as well as increase comfort for heavier riders or bikes that tend to carry heavier loads Recommended for riders over 225 lbs Spring rates have been chosen to reduce front end "dive" during braking, yet still provide excellent ride comfort Lifetime fork spring warranty Progressive Rate Fork Springs have several advantages over straight rate springs, advantage of a rising rate resistance to compression this helps in varying road conditions from small road imperfections to pothole filled roads The benefit of this is progressive spring rate 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\ r Ideal performance improvement when installing chrome lower forks They eliminate sag, reduce nose dive under braking, improve stability and increase ride comfort Sold in sets that include correct spacers for the application