Is there a golden rule as to what the steerer tube should be below the stem?
top of 2 stem bolts in the side has to be gripping the steerer, not above it.
what riding you plan? threaded you must have sufficient thread for the lock nut,
threadless, 1.125"?
you can order a BBB BHP 21 from some place like Wiggle in England and there is a stem raiser that can work.
its internal quill + shim sleeves for the stem to grip, the wedge bolt is internally threaded, so your headset pre-load is still thru the top cap, pushing down on the stem and the spacers beneath it.
threadless 1", there is a BBB BHP 20.
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