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LBS has rerouted my hydro hoses and tried to bleed them but the mechanic says the piston won’t let fluid pass. He says he suspects an o ring has swollen or failed and wants to charge me £250 for a new 8070 shifter.
I’m not the original owner of the bike and it’s about three years old so Madison won’t entertain a replacement.
Has anybody ever heard of this? He says it’s more common on Sram levers but they can be fixed.
Does anybody know if there’s a fix for this?