Shimano GRX 600 - 400 brake disc kit

Alma

Member
I need hydraulic hose kit, I can see there are two types of Shimano kits BH59 and BH90 not sure on which one I need ?
 

flake99please

We all scream for ice cream
Location
Edinburgh
My LBS told me to think of them as GRX400 = 105 group set, GRX600 = Ultegra group set.
 
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