As long as it is a 59mm ID spring it will work. I doubt it. It is most likely a 62mm one from another KTM. It will fit but it will slop around on the shock and rub the res. Yes that is a straight rate spring. It is in the part #. It is an 8.4 x 250mm spring. If it was a progressive it would say PDS 6 or something like that. Or have something like this 7.6-9.5 260. If it is a 59 slap it on and try it out.