I don't think it will void the warranty. That's only 15mm more and still a light XC fork. Manufacturers don't make so strict regulations. Check with Kona first!bikerboy said:It will void your warranty. Even with the sag, it is still 15mm longer than a 100mm fork. Just to be safe, leave it be. The frame angles on Konas are already pretty slack, so if you were to lay them back anymore, the bike would handle pretty slow.