11iron Posted March 7, 2019 Share Posted March 7, 2019 USGA lists golf balls on their conforming list as L M H spin for driver and short iron. I can't find anywhere that states the RPM ranges for these categories, and they have not answered my inquiry. Does anyone have this info? Link to comment Share on other sites More sharing options...
Angry Yeti Posted March 7, 2019 Share Posted March 7, 2019 Is this what you're looking for? http://www.usga.org/ConformingGolfBall/gball_list.pdf Cobra King F7+, VA drago 65 X, 9.5* Cobra F7 3/4 wood - hzrd red 15.5* MP-63 4-PW Cleveland 588 Tour Wedge (56*) OnCore Elixr all day every day Link to comment Share on other sites More sharing options...
TR1PTIK Posted March 7, 2019 Share Posted March 7, 2019 Sounds like he's looking for a definition of the spin ratings - L = X,XXX RPM, M = X,XXX RPM, H = X,XXX RPM... I find it curious as well that this is not defined. @11iron, is there a specific reason you need to know this? With all the variables involved to produce a given spin rate, it doesn't seem like targeting any specific RPM would be overly beneficial. Seems like the generalizations of low, medium, high and all the in-between would work just fine. Just curious is all. Driver: ST190 9.5* Fujikura Atmos Blue 5S Fairway Wood: ST190 15* Fujikura Atmos Blue 6S Hybrid: CLK 17* Fujikura Speeder EVO HB Irons: J40 CB (3-PW) Dynamic Gold Tour Issue X100 Wedges: Milled Grind 2 54* & 58* Dynamic Gold S200 Putter: Tri-Hot 5k Two 34" Bag: Players 5 Stand Bag Ball: Maxfli Tour Link to comment Share on other sites More sharing options...
11iron Posted March 7, 2019 Author Share Posted March 7, 2019 54 minutes ago, Angry Yeti said: Is this what you're looking for? http://www.usga.org/ConformingGolfBall/gball_list.pdf That is indeed the list I am referring to. My question was about the RPM ranges for L M and H spin categories. Would add context. Link to comment Share on other sites More sharing options...
11iron Posted March 7, 2019 Author Share Posted March 7, 2019 1 hour ago, TR1PTIK said: Sounds like he's looking for a definition of the spin ratings - L = X,XXX RPM, M = X,XXX RPM, H = X,XXX RPM... I find it curious as well that this is not defined. @11iron, is there a specific reason you need to know this? With all the variables involved to produce a given spin rate, it doesn't seem like targeting any specific RPM would be overly beneficial. Seems like the generalizations of low, medium, high and all the in-between would work just fine. Just curious is all. You got it: RPM for each rating. May help some (would definitely help me) with ball understanding and potentially focus selection based on extrapolated personal launch monitor spin data. I can appreciate where the letters only would certainly be beneficial to most. Link to comment Share on other sites More sharing options...
cnosil Posted March 7, 2019 Share Posted March 7, 2019 Might be hard to quantify with a number. The spin is player and strike dependent. For example if the list said 8000 is low, 9000 is medium, and 10000 is high for a wedge but I spin the ball labeled as high only 8000 are you gaining value from being provided a number? Driver: G400 Max 9* w/ KBS Tour Driven Fairway: TS3 15* w/Project X Hzardous Smoke Hybrids: 915H 21* w/KBS Tour Graphite Hybrid Prototype 915H 24* w/KBS Tour Graphite Hybrid Prototype Irons: TR20V 6-11 w/Vizard TR20-85 Graphite Wedge: 54/12D, 60/8M w/:Accra iWedge 90 Graphite Putter: Sacks Parente MC 3 Stripe Backup Putters: Milled Collection RSX 2, mFGP2, Futura 5W, TM-180 Member: MGS Hitsquad since 2017 Link to comment Share on other sites More sharing options...
Angry Yeti Posted March 7, 2019 Share Posted March 7, 2019 I believe the L, M, H are taken from OEM literature. USGA testing is for the purpose of conformity, they do not compare balls to one another as part of their test. Is X ball the right size, weight, symmetrical, and within distance/velocity standards for their robot arms test swing. They record spin as part of the symmetry test for consistency between balls and symmetrical construction, but it's not a parameter they define with ranges. If I read the procedures right, it's also recorded for initial launch conditions because they use launch monitors now instead of outdoor ranges. Spin is used for calculating distance hit, but it's not a tested value. Their procedures are published: http://www.usga.org/content/usga/home-page/equipment-standards/test-protocols-for-equipment-9df6d04f.html Also a video version: https://www.usga.org/videos/2015/03/06/testing-golf-balls-for-conformance-4098088465001.html Cobra King F7+, VA drago 65 X, 9.5* Cobra F7 3/4 wood - hzrd red 15.5* MP-63 4-PW Cleveland 588 Tour Wedge (56*) OnCore Elixr all day every day Link to comment Share on other sites More sharing options...
11iron Posted March 7, 2019 Author Share Posted March 7, 2019 3 hours ago, cnosil said: Might be hard to quantify with a number. The spin is player and strike dependent. For example if the list said 8000 is low, 9000 is medium, and 10000 is high for a wedge but I spin the ball labeled as high only 8000 are you gaining value from being provided a number? Yes indeed spin on any given shot is player and strike dependent. That is not what these numbers are. They are representative of the ball's relative performance in general. How wide a range the M is would be valuable in comparing balls for some so inclined. You may not be that person, and I completely understand that, but I most definitely could extract value with the numbers. Link to comment Share on other sites More sharing options...
11iron Posted March 7, 2019 Author Share Posted March 7, 2019 3 hours ago, Angry Yeti said: I believe the L, M, H are taken from OEM literature. USGA testing is for the purpose of conformity, they do not compare balls to one another as part of their test. Is X ball the right size, weight, symmetrical, and within distance/velocity standards for their robot arms test swing. They record spin as part of the symmetry test for consistency between balls and symmetrical construction, but it's not a parameter they define with ranges. If I read the procedures right, it's also recorded for initial launch conditions because they use launch monitors now instead of outdoor ranges. Spin is used for calculating distance hit, but it's not a tested value. Their procedures are published: http://www.usga.org/content/usga/home-page/equipment-standards/test-protocols-for-equipment-9df6d04f.html Also a video version: https://www.usga.org/videos/2015/03/06/testing-golf-balls-for-conformance-4098088465001.html I have seen the test protocols before, but not the video, thank you. While you may be correct that L M H are taken from OEM literature, I would be surprised if that were the case. I understand they are not testing spin for conformity, but they could easily categorize the balls based on their readings. Doesn't look like anyone knows for sure (at least not thus far), so I will hope that the USGA eventually answers my question. Thank you for the link to the video. Link to comment Share on other sites More sharing options...
11iron Posted March 27, 2019 Author Share Posted March 27, 2019 On 3/6/2019 at 9:25 PM, 11iron said: USGA lists golf balls on their conforming list as L M H spin for driver and short iron. I can't find anywhere that states the RPM ranges for these categories, and they have not answered my inquiry. Does anyone have this info? I finally heard back from the USGA on my question. To close the loop, while the USGA measures spin in their conformity tests, they do not use this data for these ratings. These ratings (as Angry Yeti postulated) are merely subjective OEM ratings, meaning a M ball could in fact be higher spin than an H ball. Link to comment Share on other sites More sharing options...
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