Home » The helpful cube that won’t brake the bank

The helpful cube that won’t brake the bank

Time to change your disc brake pads? Time to break out the cube!

No not the Nissan Cube, a brake piston cube!

I first learnt about this handy little device when the mechanics report came back on my Series 5 Rx7 and down the bottom of a very long list of things to fix was ‘Rear brake pads extremely low..’ – what can I say? I really enjoyed that screaming rotary..

And since this was the first time I’d ever attempted to change over a set of pads, I made sure I did two things first 1) Read up on the process first from people who had done it before and 2) Made sure Baz the ex-gearhead mechanic was within shouting distance was nearby in case I managed to do something stupid during the process (highly likely).

According to a guide on Ausrotary.com I was going to need something to wind/push back the brake piston in order to get the pads over the disc comfortably. And while people had managed to get it back in place with a pair of needle-nosed pliers and occasionally a g-clamp (this was highly useful in changing the pads on my GC8 WRX), someone suggested saving some time and frustration with a brake piston cube tool:

Brake piston cube

Work out which side you need to use (there’s a few to choose from to go with the indents on your brake piston), slot in a 3/8 socket wrench in the opposite side and slowly wind that piston back enough to get the pads in and sitting nicely. A lot less fiddly than a pair of pliers (which my brother in law learnt when working on a skyline) and very affordable if you’re planning to do more than a couple of pad changes in your lifetime.

Of course if you’re working on your brakes for the first time, make sure you have someone on hand (like a Baz for example) to keep an eye on you and to point out some time saving tips (ie: You can leave the bottom bolt in the caliper to swing it out and change the pads over rather than taking the whole thing off.) Wish I learnt that before I took the whole thing apart..

So where can I buy one of these brake piston cube tools?

Try your local tool shop, they should have a least one brand in stock. Alternatively try one of these ones online:

OTC – 4589 3/8″ Drive Disc Brake Piston Cube

CTA Tools – 1455 Disc Brake Piston Cube

SUPERTOOLS – 3/8″ Disc Brake Piston Caliper Wind Back Cube Tool TP1134

AMPRO – T71921 Disc Brake Piston Remover

Supercrazy – 3/8″ Disc Brake Piston Caliper Wind Back Cube Tool SF0134

Good luck!

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