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Re: Twingo C01 drum brakes proportioning valve

The other thing that will bring down rear brake force on drums is adjustment before/when the drum is put on.

When drums wear, there is a little lip formed on the outer edge.
This stops the drum going on if the shoes are adjusted far enough out to sit on drum diameter properly.
They will not sit properly inside drum and brake force reduced with this.
Adjuster will not cope with this.

Clean the lip off.
Bolting the drum back to front on hub and a power file, belt sander or the like cleans it off in seconds.
Or a hand file takes a little longer.
Just the lip, not the friction surface.
Then you can tweak adjuster so the drum just slips on.
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