I have just got a set of hope tech X2 with floating rotors. I am having a nightmare getting them to not rub.
Both rotors have around 0.5mm runout - to me that seems a lot?
I am setting them up as per the hope video (centralizing the caliper by eye)
I have nearly got the front ok, but one piston comes out a little bit quicker than the other so the rotor moves a little, but there is virtually no rubbing (well once per rev at the point of the most runout)
The back is a different matter though. one piston comes out a lot faster and stays out. I have tried centralising it with the pistons pushed back, and then again after the one piston moves out more - but the disc moves a lot and rubs continuosly.
Anyone got any tips before I give up 🙁
Look at teh hope site for the video on centralising the pads. Basically you get the caliper central and lock it up - then by holding in the quicker moving piston centralise the pistons - the vid explains it well.
http://www.hopegb.com/page_mep_force_39.html
I watched the video this morning, but I was half asleep and had forgotten the holding the piston in trick. I'll give that a go tomorrow.
How much runout did your discs have?
Thanks
Paul
I don't think I could measure half a mil runout. should be no runout at all but all of my discs have between a smidgen and a tad of runout. One has a gnats bawhair of runout.
I like precision me
WTF's runout 😯 😳
wobble
More precisely, runout is the radial variation rather than axial as described above. So runout is a variation on at least radius, usually caused by something being non concentric with the thing it's attached to, but sometimes because it's been made incorrectly.
I think paulwf is just referring to bent rotors.
Are they second hand brakes?
They are new brakes, and I cleaned the hope hubs before fitting the rotors.
I am referring to bent rotors - which I have always seen referenced as lateral runout?