I created a formula that estimates shock reduction based on strung weight and stiffness

[PleaseBeNicer]

I subjectively rated the comfort of various racquets and then used regression to find a decent formula to predict the comfort rating from just strung weight and stiffness.
Shock Reduction = Strung Weight + 5 * (100 - Stiffness (RA))

The fit with my subjective ratings was incredibly close (probably though methodological errors) with R-squared (R²): 0.998.

Which racquets do you think should be ranked higher or lower?

Racquet Name	Strung Weight (g)	Stiffness (RA)	Shock Reduction
Wilson Triad Five 103	284	0	784
Wilson Three BLX 2013	281	0	781
Wilson Five 103 2013	281	0	781
Wilson Five BLX 2013	281	0	781
Wilson Triad Three	278	0	778
Wilson Triad XP3	278	0	778
Wilson Five Lite BLX 2015	266	0	766
ProKennex Ki Black Ace 97	335	56	555
Prince Phantom Pro 100	323	54	553
Wilson Clash 100 v3	312	54	542
Wilson Clash 100 Pro v3	323	57	538
Head Gravity Pro 100	332	59	537
Wilson Clash 100	312	55	537
Prince Phantom 100G LB	329	59	534
Wilson K Fury 100	281	50	531
Wilson BLX Bold 100	281	50	531
Head Speed Pro 100	329	60	529
Head Gravity Tour 100	323	59	528
Wilson K Bold 100	288	52	528
Head Gravity MP 100	312	57	527
Wilson Clash 100 v2	312	57	527
Prince O3 Phantom 100X 2024	326	60	526
Wilson Clash 100L v3	295	54	525
Yonex Vcore Pro 97 330 2019	349	65	524
Prince Synergy 98	323	60	523
Yonex Vcore Pro 97 330 2017	346	65	521
Yonex EZONE 98 Tour	334	63	519
Prince ATS Textreme Tour 100	328	62	518
Prince Phantom 100X	306	58	516
Wilson Blade Pro 98	320	61	515
Head Gravity MP L	295	57	510
Solinco Whiteout 305 XTD+	323	64	503
Solinco Whiteout 305 XTD v2	323	64	503
Wilson RF 01 Pro 98	337	67	502
Tecnifibre TFight ISO 305	320	64	500
Head Gravity Team	283	57	498
Prince O3 Phantom 100X 2025	326	66	496
Babolat Pure Aero 98	323	66	493
Babolat Pure Aero 100	318	66	488
Babolat Pure Drive 98	323	67	488
Wilson Blade SW104	323	68	483
Tecnifibre TFight ISO 315	329	69	484
Wilson Ultra 95 Countervail	326	69	481
Wilson Blade SW102	323	69	478
Dunlop 500 FX	320	69	475
Babolat Pure Drive 100	318	69	473
Solinco Blackout 305 XTD 100	320	70	470
Wilson Ultra 100 Countervail	318	75	443
Wilson Ultra 108	294	73	429
Wilson Ultra 100UL	273	68	433
Dunlop LX1000	269	75	394

 

[snoflewis]

Same string and tension across the board?

 

[PleaseBeNicer]

Same string and tension across the board?

Similar string and similar tension. Rough estimates are adequate for a regression, since a regression does rely on individual estimates being accurate, just the overall trend being accurate.

The coefficient of 30 was effectively chosen to match my subjective feelings and intuitions, and could be substantially improved with more subjective data, but I'm quite confident in the rest of the formula. It also doesn't take into account head size which further reduces shock, but I mostly created this to compare racquets of similar head size.

For now, it's good enough for a rough estimate.

 

[Donmikan]

Did you play with all these rackets of you just rated them based on what you read about them? If you want to get scientific, at least there should have been multiple raters and some version of a blind test.

Every thread of yours is based on using improvised math around some random speculation.

 

[Crocodile]

I subjectively rated the comfort a various racquets and then used regression to find a decent formula to predict the comfort rating from just strung weight and stiffness.
Shock Reduction = Strung Weight + 5 * (100 - Stiffness (RA))

The fit with my subjective ratings was incredibly close with R-squared (R²): 0.998.

Which racquets do you think should be ranked higher or lower?

Racquet Name	Strung Weight (g)	Stiffness (RA)	Shock Reduction
Wilson Triad Five 103	284	0	784
Wilson Three BLX 2013	281	0	781
Wilson Five 103 2013	281	0	781
Wilson Five BLX 2013	281	0	781
Wilson Triad Three	278	0	778
Wilson Triad XP3	278	0	778
Wilson Five Lite BLX 2015	266	0	766
ProKennex Ki Black Ace 97	335	56	555
Prince Phantom Pro 100	323	54	553
Wilson Clash 100 v3	312	54	542
Wilson Clash 100 Pro v3	323	57	538
Head Gravity Pro 100	332	59	537
Wilson Clash 100	312	55	537
Prince Phantom 100G LB	329	59	534
Wilson K Fury 100	281	50	531
Wilson BLX Bold 100	281	50	531
Head Speed Pro 100	329	60	529
Head Gravity Tour 100	323	59	528
Wilson K Bold 100	288	52	528
Head Gravity MP 100	312	57	527
Wilson Clash 100 v2	312	57	527
Prince O3 Phantom 100X 2024	326	60	526
Wilson Clash 100L v3	295	54	525
Yonex Vcore Pro 97 330 2019	349	65	524
Prince Synergy 98	323	60	523
Yonex Vcore Pro 97 330 2017	346	65	521
Yonex EZONE 98 Tour	334	63	519
Prince ATS Textreme Tour 100	328	62	518
Prince Phantom 100X	306	58	516
Wilson Blade Pro 98	320	61	515
Head Gravity MP L	295	57	510
Solinco Whiteout 305 XTD+	323	64	503
Solinco Whiteout 305 XTD v2	323	64	503
Wilson RF 01 Pro 98	337	67	502
Prince O3 Phantom 100X 2025	326	65	501
Tecnifibre TFight ISO 305	320	64	500
Head Gravity Team	283	57	498
Babolat Pure Aero 98	323	66	493
Babolat Pure Aero 100	318	66	488
Babolat Pure Drive 98	323	67	488
Wilson Blade SW104	323	68	483
Tecnifibre TFight ISO 315	329	69	484
Wilson Ultra 95 Countervail	326	69	481
Wilson Blade SW102	323	69	478
Dunlop 500 FX	320	69	475
Babolat Pure Drive 100	318	69	473
Solinco Blackout 305 XTD 100	320	70	470
Wilson Ultra 100 Countervail	318	75	443
Wilson Ultra 108	294	73	429
Wilson Ultra 100UL	273	68	433
Dunlop LX1000	269	75	394

I’m going to use your formula and plug in a few more racquets and see how I go and then play test them with some clients - then get back to this thread later.

 

[PleaseBeNicer]

Did you play with all these rackets of you just rated them based on what you read about them? If you want to get scientific, at least there should have been multiple raters and some version of a blind test.

Every thread of yours is based on using improvised math around some random speculation.

I don't think you understood the original post as it explains how it's derived, so I'm going to guess that you haven't studies maths and data science at university level like I have. That doesn't mean my methods are perfect. They aren't, but nothing about your criticism suggests you know what you're talking about.

If you want to be useful, answer my question about which racquets should be rated higher or lower so I can consider flaws in the formula.

 

[PleaseBeNicer]

I’m going to use your formula and plug in a few more racquets and see how I go and then play test them with some clients - then get back to this thread later.

Great. Strings do make a big difference for individual racquets but I'm keen to hear your thoughts.