The suspension tester provides two test results: one is the curve, the other is the grip(traction).
The curve can only show the test process, and the suspension curves of all vehicles are different, because their weight and suspension type are different, so we can not determine whether there is a problem with the shock absorber simply through the curve. If need to do suspension performance analysis, we need to use a professional shock absorber test bench.
What we should refer to is the grip(traction) result provided by the suspension tester. If the value is low, it proves that the risk of the car being bumped off the road is high under bumpy road conditions, resulting in insufficient grip(traction).
However, the cause of low grip(traction) is not only the shock absorber, but the whole suspension system, including: whether the tire is short of air, whether the shock spring is faulty, whether the ball head is loose, whether the shock absorber has oil leakage, and so on.