Suspension fork replacement...old Stumpy FS. 1-1/8" headset
Over the years I have replaced just about every component on this Prestige Direct drive steel frame. It's done a great job with tons of XC riding. Currently the only items OEM are the fork, headset, stem & handlebars. Oh, and the seat binder bolt.
After many rebuilds & oil changes, now I'm replacing the original suspension fork....a "Future Shock". It was built by Rock Shox & branded for Specialized. Very simalar to a Mag 21.
The travel on the old shock is 45 mm (about 1-3/4").
To maintain the bike geometery, the closest I can come to that travel is the SID at 80MM. It's the type of fork (XC) that I wanted anyway. I bought the Sid Race. I'm 160 lbs & ride fast, hilly, unmaintained roads in NH. I'm looking forward to using the new fork later this year, but right now it's XC ski season.
Now I need to replace the old threaded headset with a threadless headset & get a new stem. Not having done this before, I'm looking for suggestions. In particular on how to size the stem and whether to use spacers.
My old stem was 135mm, 10 deg. Pretty long by today's standards. Since my back isn't getting any younger, I thought I'd go with the flow and size back to 120mm, 10deg. I use a flat handle bar. Opinions?
What's up with headset spacers? How do I determine if I need any? Should I cut the steerer long & use a spacer(s), then cut back it if I feel it's too high? With my old stem, I had it inserted as far down as it would go, but I always had the ability to move it up if I wanted. I'll lose that with the threadless system, right?
What's the easiest mid-priced headset to adjust & maintain? I am only going by advertisements at the moment. American Classic falls in my price range. Is this good? What else might be appropriate for XC riding?
I'm taking pictures & measurements of my old bike set-up today. Then I'll have some numbers to compare to.
Your suggestions (outside of replacing the frame) are appreciated.
Oh, and for the SID Race fork settings (air pressure, dampening), are the suggested settings in the manual pretty good (120# neg & pos)? Where do I start with the little red dampening knob setting at the bottom of the fork. EG: x turns in from the rabbit, or x number of turns back from the tortoise). And what pressure for the Pure Delight....on the fork it gives a range of from 20 to 60 PSI. Set it at 40 PSI???