Hope floating rotor - should I worry

vmgscot

Hi

I noticed that the outer braking 'ring' on my rear Hope floating rotor moves a bit relative to the inner alloy carrier. If I lock the rear brake I can rock the bike backwards and forwards a bit. Looks like the floating rivets or something are worn.

I don't notice it when riding (as I tend to go only forward:) but should I worry too much about this? Front rotor doesn't have this play.

Anonymous

It's a floating rotor. It does exactly what it says on the tin.

njee20

Unless you can move the brake track significantly by hand, off the bike, I had one get to that stage after some pads got very worn in a race, that was ripe for the bin.

richg1979

the outside is made to move to resist warping under high load/temps.

vmgscot

OK, I understand the floating principal but perhaps I should clarify. The movement is around 5-7mm 'around' the rivets. My front don't move anywhere near as much (1-2mm). I thought the 'float' was to only to allow for heat expansion which only needs a tiny amount of movement.

Tom Barton

Your right, that play is excessive - normal play is a mm or so at most - the discs are relatively small, heat expansion for mtb temps only needs that mm. 5 - 7 mm is going to eventually break something under hard braking. If it were mine, I'd change it.

Anonymous

yeah, 5 or 7 mm is too much, by a long way.
In fact, I'd say it would be near impossible for the braking surface to stay in place if it was moving that much, since the rivets are only about what, 12mm in diameter?

vmgscot

Thanks for advice....just heading out on my local trails at Drumlanrig so will make it the last trip for this rotor.... it survived Ae Line yesterday but I tried not too brake much :-)

cavegiant

Send it to Hope see what they say.

They are generally 100% nice guts, the only exception was when I had a problem with my rotor....oh dammit.