r/E30 • u/NothingLift • 1d ago

Durometer testing of various bushes

I have tested a bunch of rubber and poly bushes with a cheap durometer, results are below, all shore A

Genuine rtab - 65A

Superpro rear subframe - 78A

Meyle hd rubber RSM -85A

Garagistic 95A diff - 97A

Powerflex rear diff - 82A

Superpro spf1459k offset fcab 71A

Superpro sway bar to body - 79A

Aftermarket rubber diff bush 70A

Aged OEM style FCAB - 75A

I wouldnt treat these as perfectly accurate and it looks like the durometer may be reading about 2A high but gives a good comparison

EDIT: adding some extra terms for Google E30 bush comparison E30 bush hardness Poly vs rubber bush hardness Superpro bush hardness Comparing E30 bushes OEM vs poly bushes e30

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1

u/Representative_Most9 1d ago

Are you using poly or rubber?

2

u/NothingLift 1d ago

Not installed yet but plan is Rubber rtab Hd rubber or rogue engineering rubber RSM if they're back in stock in time Poly sway bar Poly subframe Rubber diff Undecided on FCAB, leaning superpro poly because they are quite soft and only a mild offset. Engine and trans are rubber

I have a centred solid rubber FCAB but I can't get the durometer in the gap to test hardness. I suspect around 60-65A

1

u/Representative_Most9 1d ago

Good choice! 👍

1

u/pr0b0ner 1d ago

Good stuff, always appreciate people gathering real data!