Have a look at Mt Zoom, I just bought a 90mm one and it weighs about 80g, absolute steal at £35! Might not be the most aesthetically pleasing stem out there but its not hideous either https://mtzoom.com/collections/bars/products/ultralight-stems-6-17-degree-for-road-mtb-from-79g
Kalloy Uno from HK / Taiwan are (were?) significantly cheaper. 95 grams or thereabouts. Y0u can buy them from Rose under their own brand too, less work with acetone to remove the logo I guess.
UNO from Asia is definitely cheaper, just throwing another cheapish weight weenie option on the pile.
@Lolo started
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Have a look at Mt Zoom, I just bought a 90mm one and it weighs about 80g, absolute steal at £35! Might not be the most aesthetically pleasing stem out there but its not hideous either
https://mtzoom.com/collections/bars/products/ultralight-stems-6-17-degree-for-road-mtb-from-79g