Help with brakes

anthonyhaworthWjLojXCs

Hi people.... I was out yesterday and everytime i brake hard i can feel my brakes juddering on both front and back.. But there ok when pull them soft... Any ideas

david37

clean them

oxoman

Cleaning can help, some juddering is to be expected under hard braking. Your forks will judder especially if only thin 28mm 30mm diameter forks as fitted.on cheaper bikes. Even bigger diameter forks will do some juddering under braking.

anthonyhaworthWjLojXCs

So this is perfectly normal

veronese68

Possibly, has it always done that?

anthonyhaworthWjLojXCs

I bought it second hand about a week ago...

anthonyhaworthWjLojXCs

And it was hardly used and in mint condition

oxoman

What make and model bike is it and also any idea what forks are on it. This would give an idea of how good or bad the forks might be. Also are they hydraulic or mechanical disc brakes. Could possibly be oil or similar contaminating the pads.

anthonyhaworthWjLojXCs

The bike is a voodoo canzo 2016.. Forks are suntour epixon.. Brakes are tekro auriga

steve_sordy

I would bet on contamination of either pads or disc, probably both. It's easy to get contamination from oily road surfaces. I transport my bike on a towbar rack and I always protect the discs with zip-lock sandwich bags.

The discs can be cleaned with isopropyl alcohol (IPA) or any brake cleaner.

Pads are harder to deal with and may be irrecoverable. But it's always worth a go. Remove the pads and rub each one in a circular fashion on a piece of sandpaper or emery cloth laid on a flat surface. 80 grit ought to be OK. It should not take long, keep blowing away the dust. The surface should look cleaner and no longer shiny.

Refit the pads and bed in the brakes (see YouTube). This step is important!

anthonyhaworthWjLojXCs

Thank you