I'm looking to get a new stem for my bike along with new handle bars. I have an 07 Redline 925 I believe (its the gray one). I bought it used and has a specialized stem installed and I'd like to replace it, but I'm unsure of the what I need to know in terms its sizing along with the headset. I've looked at some other model specs and they say 1 1/8. Does anyone have exact specs?