Because you can have them build them to your desired height, retaining the number of coils, thus keeping some ride. When I first just cut them my front end bottomed out ridiculously bad. The cheap and easy is not always good. This is not on topic.Sporticus said:This might show my ignorance, but why can't you cut the ones you've got (being careful not to heat them up too much)? I used a cutting wheel on my 4" grinder and used lots of water to cool. Is there any reason why this shouldn't work in a non-progressively (straight-wound) spring.