FORTRESS- I have a 99 Polaris Classic 500 ZTouring 2 up sled with the ExTRA-12 suspension.My sled has almost 4000 miles on it and have had no problems with it bottoming out at all and I ride this comf-couch pretty quick!!As others have said, adjust it to your weight and it should work OK for you too.There is a sticker under the hood and in the manual telling you how to set the suspesion up for your weight.There is also a littel hex screw on the shocks to adjust the valving from soft to hard and also you can adjust the spring on the shock.My friend also bought a new 600 Touring sled with the same set-up and we did an 1000 mile tour last Winter in -39 F temps and they did ride alittle stiff until the shocks warmed up but this suspension as others have said, is not made to keep up on the trails with sleds like the XCSPs, F-Cats.It must work OK as I see they are still using it in the new sleds. Good luck with yours.