120mm is fine. It would lean the headtube to the steep side a tad of course. From a 150mm fork to a 120mm the head angle would change about one degree. It wouldn't love the gnar in the same way but it would xc better....

 Would 27.5 wheels work on this frame? Would a tapered fork work? Thanks

 Tapered fork yes.

For 27.5" it'd have to be on a fairly low-pile (tread height) and not larger then a 2.3"

 Close to $250. We can work on the costs with you. Write me, cookie@chromagbikes.com and we'll work through it a bit.

 My name is Cookie.

 thank,s

 5.6lbs. or 2.55kg

 We have our Stylus frames available in large.

 Black, grey, neon orange and neon yellow. The smalls weigh 5.5lbs. Please contact me through the buy and sell ad or direct message me at Chromag

 @Chromagbikes: Thanks for your reply. So, does it fit a 160mm fork? what is the headangle and seat angle if i put a 160mm pike on it?

many thanks

 @fuyu: It fits any fork you want. The head angle will change approximately 1 degree for every inch or 25mm of travel.

BTW this is not a direct message or a message on the buy & sell. Please do that moving forward. This only shows up on our "dashboard" which can be flooded by 1000's of items in a day and we can lose your questions.