I just stumbled upon this diagram and thought it would be useful for some of you. Personally I always thought any urethane bushing would be much stiffer than the stock rubber we are used to in our cars such as motor mounts, trans mounts, subframe bushings, etc. But as urethane becomes more popular among the enthusiast crowd, several e30 parts suppliers are starting to make their parts out of more than 1 kind of urethane (AKG offers most of their parts in either 80A or 75D, along with solid aluminum). Which ones are more stiff? Which ones are less stiff? How do they compare with stock rubber? Hopefully this will help:
As you can see, a '75D' bushing is roughly equivalent to '100A', and '80A' is similar to '30D'. So there is a big difference between the 75D and 80A urethane bushings! In fact the 80A are very similar to stock rubber bushings or even the soles of your running shoes.
Cheers and happy driving :up:
As you can see, a '75D' bushing is roughly equivalent to '100A', and '80A' is similar to '30D'. So there is a big difference between the 75D and 80A urethane bushings! In fact the 80A are very similar to stock rubber bushings or even the soles of your running shoes.
Cheers and happy driving :up:
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