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@gbj_tester
Get a Grammo if you're a weight weenie, but I think it will look out of place. If you're swapping bolts on a 1A stem, keep the steel one for the bar clamp because they are marginal anyway, and Ti will shear off, but you can change the heavy expander bolt and cone to aluminium, as on a 1R. I think a 1A with the 1R bolt and cone actually comes out fractionally lighter than a native 1R, and the 1A bar clamp is more secure.