Straight Rate - or constant rate springs, are where the entire spring is wound at the same pitch, therefore every kg of force has the same effect on the spring throughout its length. For example, if it takes 25kg of force to compress the spring one inch, it will take another 25kg (50kg in total) to compress it the second inch and so on until the end of the travel. KTM used the straight rate springs on bikes from 2005 onward.