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littleK
My rear GRX 810 shift lever seems to be hitting an obstruction when I try to shift up out of the hardest gear (smallest cog). I can shift up once and then usually the lever just seem to hit a hard stop like there is some obstruction in the mechanism. It's not like there is some frayed cable, dirt or grease there. Also, randomly it will work perfectly for a bit along the whole range. Then it will revert. I've taken the cable out and removed the plastic cover at the bottom of the lever, but looking inside I can't see what the obstruction is.
Any suggestions? I can't see anything online about maintaining this part of the shifter so guessing it's not even designed to be disassembled and repaired. Could be a warranty claim as it's about 16 months old.