ryushen21
Legend
You can all thank @JGads for this thread existing. However, we've come to a point where this must be addressed.
Wilson seems rather insistent upon utilizing their own developed measurement called the Stiffness Index. It's supposedly how some of our favorite racquet lines were named (6.0, 6.1) etc. depending on which version of Wilson's own literature about this that you read, a frame with a higher Stiffness Index will be more flexible than one with a lower one.
On the other hand, RA is stiffness measurement that we get from most retailers and is measured at one point on the frame using an RDC machine. It does not account for hoop flex since it is not measured there.
So, how does one reconcile this difference between the stiffness measurements? We know that different iterations of Wilson 6.1 frames have had drastically different RA measurements despite never being relabeled by Wilson. This also makes establishing an approximate RA for the different Wilson SI rating quite difficult.
What are your thoughts TT experts?
Wilson seems rather insistent upon utilizing their own developed measurement called the Stiffness Index. It's supposedly how some of our favorite racquet lines were named (6.0, 6.1) etc. depending on which version of Wilson's own literature about this that you read, a frame with a higher Stiffness Index will be more flexible than one with a lower one.
On the other hand, RA is stiffness measurement that we get from most retailers and is measured at one point on the frame using an RDC machine. It does not account for hoop flex since it is not measured there.
So, how does one reconcile this difference between the stiffness measurements? We know that different iterations of Wilson 6.1 frames have had drastically different RA measurements despite never being relabeled by Wilson. This also makes establishing an approximate RA for the different Wilson SI rating quite difficult.
What are your thoughts TT experts?