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I’m doing shaft comparisons for an upcoming TS3 build for myself. So far, I’ve tested the Score LT and the 950GH shafts (950 barely edged out the Score). I was planning to also test the Zelos 8, 950GH Neo, and Pro Modus 105. I thought I’d get the “soft tip” thing out of the way by building next with the Zelos 8, but when I frequency checked it I got 265, which is L flex for a 37.25″ 7i. So, I tested the Neo and the 105 and got 300-305. This correlates well with the Score at 308 and the 950 at 302. I have a calibration rod for my frequency machine, and it reads right on the calibration number. Is something wrong with the Zelos 8 shaft I have or is it expected to test at L when it’s an R shaft?

Thanks!

Britt Lindsey Answered question 6 hours ago

1 Answer

Answer 1 · 2026-03-30T14:43:09+00:00

In looking at the raw shaft frequency numbers in our database, the Zelos 8 is more flexible in butt frequency, and in all the zones actually, in the R flex than the 950 GH or the Modus 105. What that translates in finished club frequency I don’t know since we don’t test all the shafts cut to specific playing lengths and head weights. All the Zelos models are more flexible per flex than other models. Zelos 6 is more flexible than Zelos 7, 7 is more flexible than 8, etc. Lightweight and flexible is the target. Since there are no standards for flex from one manufacturer to the next, or even one model to the next with the same manufacturer, they can and do designate “R” or “S” or whatever flex within that model. The Zelos 8 R flex may be more like an A or L compared to others, as your testing has indicated.

I did talk to Jim, our resident shaft tester that does all the data gathering, and he said the Zelos is definitely softer across all models and flexes. So I think what you have is not an anomaly, but just what that shaft is. If you want a little lighter and not as flexible, the 850G Neo is firmer than the Zelos models, but not quite as firm as the 950GH and 950GH Neo.

Britt Lindsey