![]() ![]() Adding spacers quickly adds up to a less stiff cockpit. ![]() As you know, the deflection of a cantilevered beam increases exponentially with distance. The steerer is not going to break because you put extra spacers above the upper bearing. The issue is not so much safety as it is stiffness. There is no magic to this number, but we need to set a limit somewhere. With standard stems and headsets, that works out to about 90mm of spacers, which is quite a lot. Spacer stack height limit on the Z-pro is 130mm from frame to top of stem. I then ran your question past Bert Hull at Alpha Q: Quote:According to True Temper, you can cut an Alpha Q Z-Pro fork steerer to 144mm longer than your head tube (I’ve included the 14mm for the bottom headset cup: 130 + 14 = 144).
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