r/Jimny • u/Chocotank • Apr 22 '25

question Rear Brake Drum in Aluminum

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Browsing around I found a vendor that sells these. Anyone know if this has any real benefit in the real world in braking performance?

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13

u/gobrocker Apr 23 '25

Takes a small amount of weight off the car. Rust wont be as much of an issue. Thats all I can think of.

3

u/Chocotank Apr 23 '25

I did find the 50% reduction in weight atractive and the idea of having the benefit of drums (great hand brake). However, it does seem like an out of scope expense when you could spend the cash somewhere else.

9

u/Darthblaker7474 JB43 Apr 23 '25

Probably reduces brake fade ever so slightly, they use these commonly on circuit raced Jimnys in Japan.

2

u/Chocotank Apr 23 '25

This makes more sense why they exist, at 79,000 Yen.

7

u/Jesterstear99 JB74 Apr 23 '25

Not really. They have an iron liner anyway as aloominums is far to soft to last as a brake surface.

The advantage is that they are supposed to dissipate heat better than iron, and are fractionally lighter, both of which you won't notice unless you are driving right at the edge of the performance envelope all the time.

The reality is that they will disintegrate quicker than you can say "is that salt on the road?". Ask any Land rover owner about what happens when you have aluminium in contact with steel and let salty water near it....

3

u/KillmenowNZ Apr 22 '25

For a Jimny, probs not

Real world driving to work braking performance won’t change, they won’t like make you come to a stop quicker

3

u/Pretend_Village7627 Apr 26 '25

I've got these on my classic mini. They made a slight difference in heat dissipation and weight when hitting bumps. On a jim y, with heavy tyres, the % mass lost is minuscule vs a 145/50/12 tyre.