Mopedist.si

Hello guy's,
I want to put new pistons in my front disk brake.
But i use my AT50 on daily base, so i can't get my caliper of my moped and measure how big the brake pistons are.
I though they had a diameter of 30mm and they where 13mm high.

Can anyone help me? It's on an AT50 with a Grimeca caliper and a Marzocchi front fork.

I found out which size they are.
They are 30*12, the same size as a lot of Zundapps have.

I thought perhaps someone has got something about this information.

We buy parts in store with Tomos parts, where you just say what you need. I think, here nobody doesn't buy brakes by size. Sorry.