Hi All

I've been having bike for few months and riding it is great with the exception of rear wheel hitting my
ass/saddle every time I do bigger jump/small drop off. I've recently lifted up the saddle a bit but even with me higher on
the bike it still hits "us"

The the wheel travel is on my DHX4 is 7 inch, 2.5 stroke and my weight is 90kg(200lbs).
The shock has 180psi in reservoir and spring turned twice, propedal is off.

The spring is 500x2.8 so it seems that it's rate is perfect for me according to this calc:
http://www.tftunedshox.com/tech-area/spring-calculator.html

Is there anything I'm missing in setup or should I be looking for higher rated spring ?

Right, but it's already higher then I'd like it and I wouldn't want it comes my way while I'm going DH or landing from a jump.

according to http://www.mojo.co.uk/html(mojo)/springcalc.htm the spring you need is a 543lbs so maybe a 550 will be better?

if your running 2 turns of preload then your already on the limit of that spring anyway. a 550 with no extra preload will be roughly the same.

although it wont stop the tyre touching the frame, it wont happen as often.

my bike used to do this but i moved the saddle forward and up slightly and it solved the problem.

i have a Ti spring for sale if you want, 550lbs....  lol

calla_tha_one
Could you ask what did they do exactly to the rear suspension/shock ?
I usually do all my repairs and maintenance my self, so only if I new what to change
I'm sure I could do it on my own.

All
Thanks for all the advices.

which shop do you work for buddy? you sound like you know what you're doing.