There is a list somewhere, but top of my head you have:
Could also be that some are 12 degree. I have all except the Extralite, reports that they too flexy at 120mm.
Extralite, zipp and specialized are 12 degree. Extralite only does chodey 120mm stems. Thomson and Pro do almost man sized stems at 130 and plenty stiff. Still can't find the unicorn of 140-150mm 12 degree and stiff enough
@Netakure started
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There is a list somewhere, but top of my head you have:
Could also be that some are 12 degree.
I have all except the Extralite, reports that they too flexy at 120mm.