x factor spindle for icon?

tc racing

New member
just bought an x factor spindle for my icon. compared stock spindle to x factor and couldn't see any difference. so my question is... what are the differences that I should be able to notice by looking at them besides one is stamped xf.
 
so if I understand you correctly. the area inside the black hub where the bearing is, is actually higher? I didn't look at that area but will later. thanks for the info.
 
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