It appears there's something screwy with FST's trim instructions for the 115 shafts considering the regular and stiff flex have the same DSFI. The raw shafts are combo flex and 43" long, however the A/R flex has a 13" parallel tip and the S/X is 11". Would trimming an extra inch to the provided trim instructions for the S/X shaft be sufficient to obtain a useful flex range?



I’m not 100% sure what you mean by “useful flex”, but I used the 115 in the past and didn’t find the “x” near stiff enough, I over tipped by 2” per club and got something close to the DG x-100 flight/feel.

    DC300 Thanks. By useful flex range I meant from A-Flex to X-flex there's an 8 mph DSFI difference, which is essentially an increase in one flex.

        DonM He only tests one sample. I’ve seen the same thing on other shafts too.

        Agreed. I think Tim Hewitt said way back when... as a fitter/clubmaker get to know a shaft product line build test clubs at various flexes, weights etc. and get to know that line inside out and stick to it. Then, you will know how to prescribe good performance and results for a client. I agree with Tim's statement.

          pellmell Ok, I get ya. I find the “multiple flex” shafts to be a bit of a struggle myself. I thought 2 inches of extra tipping would be way too aggressive, but it worked out ok. I wound up just not using those shafts any more and went to the much stiffer profiles. Cost is always a big factor and at that time you could pick up the FST 115/125 for around $4 a shaft, so they were hard to ignore and easy to experiment with. Not sure what they cost these days, but I imagine for anyone not trying to make them a XX flex they still work out well.