ShopTalk: RSSR vs DSFI

[Alan Joyce]

I downloaded the Dynacraft shaft DSFI index. There seems to be a difference in their swing speed recommendations from Golfsmith's RSSR. It seems to me that the DSFI shows their results to be softer flexes as Golfsmiths. The 5 iron length is 37.5 in the DFSI but what is it in the Golfsmith's RSSR. My swing speed for a five iron would be 80 mph.(38 inch) Most dynacraft shafts would have me into x-flex? am I really missing how this DSFI chart works? Alan