Hi James,
Sorry you’re having trouble with the fitment.
We have tried to give you a call so we could talk this through properly, but we haven’t been able to reach you yet.
You have purchased the Gorilla Brakes NRS ONE pads. On these pads, the spring is built in as one piece,
If the pads are sitting in contact with the rotor, the spring may need opening up slightly before fitting. This adds more tension and helps the pads sit back from the rotor correctly.
Please remove the pads and gently open the spring section out a little, then refit them and centre the caliper over the rotor.
GRX brakes can also suffer from corrosion or build-up around the pistons, so it is worth checking that both pistons are moving freely and returning evenly.
give our workshop a call on 0800 772 0937 and we’ll talk you through it.
Kind regards,
Lee
Gorilla Brakes