Durometer question
07-30-2008, 05:20 PM
#2
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07-31-2008, 02:59 AM
#5
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I think its kind of weird that they are sold without instructions. I just started using one too.
What I have figured out is that you need to measure hardness the same way at multiple places and at a consistent temperature. Don't take a measure of a set sitting in the sun against the same set in the shade - that sort of thing.
The key is to take multiple quick measures at several places in the same conditions. The number isn't meaningful, its the change. You have to record the measures and do it exactly the same way or you won't get a meaningful indication.
I think the only predicable one is cold, but I am open to suggestion on this.
I have a friend who turned his cup tires into "never-turn" tires after they cycled. I don't want that.
What I have figured out is that you need to measure hardness the same way at multiple places and at a consistent temperature. Don't take a measure of a set sitting in the sun against the same set in the shade - that sort of thing.
The key is to take multiple quick measures at several places in the same conditions. The number isn't meaningful, its the change. You have to record the measures and do it exactly the same way or you won't get a meaningful indication.
I think the only predicable one is cold, but I am open to suggestion on this.
I have a friend who turned his cup tires into "never-turn" tires after they cycled. I don't want that.
07-31-2008, 10:37 AM
#6
Three Wheelin'
Probably a good idea to pay attention to ambient temperature as well as tire temperature, i.e. you can get a different reading at 50 degrees F than at 90 degrees. You wouldn't want to falsely attribute a higher reading to hardening of the tire just because you test it on a cool day.
Scott
Scott