Hi, I need a little help I want to convert the back drums to discs and I don't know what size discs and calipers to use, does anyone know what sizes to use? Thanks

There's a guide with all the answers your looking for
https://www.fiatforum.com/cinquecento-seicento-guides/172993-rear-disc-brake-conversion-ii.html

Ahh I will take a look at that, thanks

There is a dude selling the brackets you will need on ebay.

If you can, get hold of the alloy version of the calipers - lighter

Depending on what your after in a month or so ill have my complete rear beam for sale with poly bushes rear disc conversion braised flexis calipers reconditioned 1000 miles ago with new discs and pads

I would be interested in this

So would I that would be quite nice to have.

Who can't say those don't look better then drums

I like it did you say this all going to be for sale??

Hi is the rear beam still for sale?

Do these fit within standard Cinq Sporting 13 inch wheels?

Ian S said:

Do these fit within standard Cinq Sporting 13 inch wheels?

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In a sense yes the rears but in reality you will have to upgrade to 14s becuase to run the rear disc brakes safely you will also have to upgrade the fronts and most normal 13inch wheels will not fit over the front brakes after you've upgraded

OK, thanks.

I just bought two new front tyres for 13's so won't be wanting to change just now.

But the braking is utter rubbish. It got worse when I had to fit two new rear cylinders last April. An extra car length passes before they fill up and what braking there is ensues!

I was wondering about brake balancing as that was not mentioned by the original poster.

Do people add an adjuster? I presume there are two fixed rear brake compensators on the Cinq?

Just had a thought on this if I convert to disc's what is sensible to do to the front

Struttycento said:

Just had a thought on this if I convert to disc's what is sensible to do to the front

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You need to do the fronts if your doing the rear there'd a guide on here somewhere that tells you what front brakes you can use but for the life of me I can't find it only using the mobile app atm

Okay I was looking at putting normal stock discs and pads on the back and on the front uprated ones like Brembro or tarox

Disc brakes don't give more stopping force, all things being equal. If the effective diameter of the pads / shoes is the same, if the area of the pads and shoes are the same and if the friction material is the same, they'll give the same stopping force.

The inner drum diameter of a cento brake is 185mm. Depending on the pad size, the effective diamater of a 227mm disc is about 182 or 183mm.

Drums and discs do differ. Drums have more "self servoing" effect so they bite more at first. The also clamp harder as they cool. So they make better hand brakes.

Drums stretch a bit with big pedal forces (they go oval) so they work less well at high demand. At very high forces, you get less braking effort with drums. But this suits cars that are front heavy. It makes the brake force shift forwards under heavy braking. Drum stretch gives worse pedal feel.

Discs cool quicker and drain water quicker. They suffer less fade. They self adjust.

For road use, you're probably better of with drums. Fit shoes with a fast road friction material if you want more stopping power. However if you have a heavy foot or do mostly track driving, you may prefer rear discs.

I wouldn't worry too much about fitting rear drums without changing the fronts. You won't be adding much rear brake force with the change. Fit fast road pads to the front brakes if you want a quick and easy front brake upgrade.

Sorry, that should read:

smart51 said:

I wouldn't worry too much about fitting rear discs without changing the fronts. You won't be adding much rear brake force with the change. Fit fast road pads to the front brakes if you want a quick and easy front brake upgrade.

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Do the do adjustable rear brake compensators that would easily fit the Cinq?

Have these up for grabs send me a on if interested

Arms are poly bushed , alloy gt3 calipers reconditioned 1000 miles ago and had discs and pads at the same time, with braided flexi hoses wheel bearings 2 year old

Also comes with 1000 mile old handbrake cable old and custom stainless hangers to get a good handbrake

Ash