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Guide to Hardness Selection
It has become necessary to dispel many myths & misconceptions on application of hardness caused by imitation.
SuperFlex grades are all pre determined in hardness suitable for road to fast road use. As a customer, you do not have to choose the hardness, unless an option on our listings.
On some cars all four production hardness are applied in various positions around the car, depending on the load in that location – as tested and pre determined by us.
Colours of SuperFlex bushes do not identify hardness, with the exception of 95 shore which is only produced in red.
To simply blanket a car with one hardness and call it: comfort, dynamic, performance, race, road or touring displays compromise or limited production capability and doesn’t work.
See selection chart below - based on nearly 30 years PU manufacturing experience:
Guide to Hardness Selection |
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| 70 Shore | Typically subframe mountings where low NVH is a priority and situations where compliance is desirable | |
| 80 Shore | Typically wishbone, radius rod, non coil over shock eye bushes | |
| 90 Shore | Typically leaf spring eyes or more heavily loaded wishbones & radius arms, trunnion bushes where replacing rubber | |
| 95 Shore | Typically intensely loaded coil over shock bushes, trunnion bushes where replacing nylon – red only | |
For certain motor sport applications we can make bushes typically in firmer grades to special order. The lead time for this service is 4 weeks and is subject to a minimum order of 100 pu pieces of any one part number.