[lardo5150]

I have a RaceFace Turbine R 35mm stem.
Do not see anything on their sit about this.

How much space is allowed below the top of the stem, to the Steerer Tube?

 

[J.B. Weld]

The official info is probably buried somewhere in Race Face's tech documents but generally you top bolt of the stem no higher than the top of the steer tube, or apx 3/16".

 

[RS VR6]

I think it depends. Some bike manufacturers don't want a spacer on top of the stem and it's typically no more than 40mm below the stem.

 

[Impetus]

I generally leave a 5mm on top, especially if the stem has cutouts in the part that contacts the steerer tube, like a Thomson. Looking at pics on the internet, your Aeffect stem may or may not as well.

If it were a short, solid stem with full-contact I might chop it flush, and stick a 2mm spacer to allow for the preload cap.


Or are you meaning from the upper headset race to the stem?


Sent from my iPhone using Tapatalk

 

[mack_turtle]

Park recommendeds 3mm.
https://www.parktool.com/blog/repair-help/stem-removal-installation-threadless

General rule: make sure the steerer tube reaches the top of the the top bolt.