• going for mtb trigger shifters and risers but will they work with current stock brakes (shimano 300 ex), and sora rd? Have spare xt rd if needs be.

    You need 'Flat Bar' brake levers, not MTB V-Brake levers. Sora and Tiagra grades available. There are Flat Bar gear levers (and even STI combined units) too, but 9-speed Shimano will happily mix/match between MTB and Road. I'd be inclined to bin the front dérailleur and run 1×9 with the XT RD and matching shift lever. HG50 cassette has loads of options, from 14-25 rat racer to 11-32 for hauling a full load of shopping.

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