Question regarding fitting data

I hope this is posted in the right place. I hand grenaded my R11s on the range last week so I am in the market for a new driver. I went to a local independent golf shop to demo a few and hit both the M3 and M4. I swing between 102 and 105 pretty consistently. With settings optimized both clubs were launching around 13 degrees and had similar ball speeds. The big difference however was in spin. Well struck shots on the M3 spun between 2600 and 3200 with spewy shots spinning between 4k amd 4,500. The M4 with weights set forward consistently produced spin between 1700 and 2000 with poor strikes staying around 3,500. What I found really odd was the "distance" of the two clubs. The M3 carried between 235 and 245 yards with 15-20 yards of rollout. The M4 with carried a solid 10-15 yards farther with the biggest (on a particularly good swing) carrying 266 and rolling out to 290. Do these numbers add up? I was under the impression spin rates between 2500 and 3000 were more desirable for pedestrian swing speeds. The bay used flightscope which if I'm not mistaken is pretty accurate.

if launch angle is good, we DONT need a lot of spin to keep it hanging up there, i dont know who launched that myth who say the oposit, but its a hard one to kill. Even players down at 90 mph club speed and only 135 of ball speed is just fine with spin levels below 2000 if launch angle is good. Higher spin levels can help us to stretch it a little longer if launch is low, but not much, so in general, if launch is good, any spin value from 1700 to 2700 is "playable" and the higher launch is, the less spin we need.

PS! when we compare 2 different heads (or test a new one), pay attention to where you make impact in the face.

Below the centerline ADDs spin, above cuts of spin, and the average seems to be 480 rpms for each 2/8" up and down, so it dont take much to add or reduce 500 rpms, where the head might get the credit, but when we compare impact spot, the picture might change and tell a bit different story, so pay attention to where you make impact since VERTICAL GEAR EFFECTS is the ABSOLUTE ruler or spin on a driver ( it overrules ALL other parameters, static loft, dynamic loft...ALL of them, so IMPACT position is VERY IMPORTANT here)

Howard thanks for your response. Truthfully I didn't put much focus on face impact points if for no other reason than my swing isn't exactly repeating right now (I have a 5, 3, and 1 year old at home who has time to grove a swing). I can say with near certainty that the spin differential was due primarily to the head and not face impact. The first time I hit the M4 it was like flipping a switch. I even toggled back between the two as the fitter tinkered, hitting a few balls with each one as we fine tuned. Seems as long as I launch properly I shouldn't be concerned 1700 spin is to low for my150mph ball speed.

Keep in mind, some monitors out there don’t have the best algorithms for gauging those high launch low spin shots and they tend to be a little inflated over reality. Theee might be gains there, they just may not be as great as the monitor makes it seem when it comes to real world results.

> @Golfrnut said:

> Keep in mind, some monitors out there don’t have the best algorithms for gauging those high launch low spin shots and they tend to be a little inflated over reality. Theee might be gains there, they just may not be as great as the monitor makes it seem when it comes to real world results.

100% this. And, the sims at my local GolfSmith store before it closed were always setup with a 15mph tailwind to inflate distances. High spin works down wind, so I wonder if this is also a factor. Juiced sims sell drivers!

> @cyliam75 said:

> I hope this is posted in the right place. I hand grenaded my R11s on the range last week so I am in the market for a new driver. I went to a local independent golf shop to demo a few and hit both the M3 and M4. I swing between 102 and 105 pretty consistently. With settings optimized both clubs were launching around 13 degrees and had similar ball speeds. The big difference however was in spin. Well struck shots on the M3 spun between 2600 and 3200 with spewy shots spinning between 4k amd 4,500. The M4 with weights set forward consistently produced spin between 1700 and 2000 with poor strikes staying around 3,500. What I found really odd was the "distance" of the two clubs. The M3 carried between 235 and 245 yards with 15-20 yards of rollout. The M4 with carried a solid 10-15 yards farther with the biggest (on a particularly good swing) carrying 266 and rolling out to 290. Do these numbers add up? I was under the impression spin rates between 2500 and 3000 were more desirable for pedestrian swing speeds. The bay used flightscope which if I'm not mistaken is pretty accurate.

Flightscope is accurate but when it is used indoor (as all radars do), if you don't put a metallic sticker on the ball radars can throw out an arbitrary spin number which didn't happen in real life. Trackman does this too. So if your ball speed is somewhere around 140-150 (based on your club head speed), it's highly likely that the spin was not measured but calculated.

Now, if this fitting was done outdoor, 99% of your shot spins would've been measured so you can believe the spin numbers there. For more info, you can visit my homepage on the left to see various launch monitor comparisons and how they measure data.