Profile Before Flex Letter
A letter stamped on a shaft describes nothing you can act on. We measure stiffness at intervals along the raw shaft and read the curve, because two shafts labelled the same can behave nothing alike below the midpoint.
Manchester Avenue · St. Louis, Missouri
Your Clubs Leave Here With a Number on Them
Pro Line Fit Golf is a fitting studio with a working build room attached. Every shaft that goes into one of your clubs gets profiled, trimmed to a written spec, and measured again after assembly — and you keep the card that says what it read.
2009Shop opened
2Fitting bays, one build room
±1 CPMAssembly tolerance
0Brand quotas to hit
The house position
Three Rules We Do Not Bend
They are unglamorous. They are also the reason a set built here still measures the same two seasons later.
Trim Decisions Get Written Down
Tip trim, butt trim, playing length, and the reason behind each one go onto the build sheet before the saw touches anything. If the club needs replacing in four years, the next builder does not have to guess.
Measure It Again After Glue-Up
Intent and outcome are different things. Frequency, swingweight, loft, lie, and length are all re-checked on the finished club, and anything outside tolerance goes back on the bench rather than into your bag.
What we fit
Six Ways Into the Bag
Book one category or work through the whole set. The measurement discipline does not change from one to the next — only the variables that matter do.
01
Driver Fitting
Shaft profile matched to how late you load, then head, loft sleeve, and weight position sorted against measured carry and dispersion rather than peak ball speed on one lucky strike.
02
Iron Fitting
Frequency stepped evenly from the longest iron to the shortest, with lie angle checked on an impact board so the set reads as one continuous instrument.
03
Fairway Wood Fitting
The club most golfers own but do not trust. We look at sole width against your turf, and at whether the shaft is asking you to lift the ball rather than strike it.
04
Hybrid Fitting
Filling the gap between your longest comfortable iron and your shortest wood, with a shaft profile chosen to sit between the two instead of arguing with both.
05
Wedge Fitting
Bounce and grind chosen against the specific turf you play in this region, with shaft weight and length tuned for control on partial swings rather than full-send yardage.
06
Putter Fitting
Length, lie, loft, and head balance measured against your actual stroke arc, with grip shape treated as a real variable rather than a personal preference nobody questions.
Inside the build room
The Card Comes With the Clubs
Most golfers never learn what their clubs actually measure. They learn what the box said. The two are related the way a speed limit sign is related to traffic.
Everything assembled here is documented on a single card: raw shaft length before cutting, tip and butt trim taken, finished playing length, butt frequency, swingweight, loft and lie as measured after bending. It travels home with you, and we keep the duplicate on file so a repair three years from now starts from a record instead of a guess.
Walk Through a Session
Build Card 4471-B
Signed off
Raw shaft length46.0 in
Tip trim taken1.0 in
Butt trim taken0.5 in
Playing length44.5 in
Butt frequency247 CPM
SwingweightD2
Grip build-up2 wraps, lower hand
Sample card. Yours is filled in by hand at the vise and initialled by the builder who cut the shaft.
How a visit unfolds
Five Stages, No Surprises at the Counter
1
Bag Inventory
Before you swing, your current clubs go on the frequency machine and the loft-lie gauge. Half the useful information in a fitting comes from finding out what you have been playing.
2
Baseline Swings
You hit your own clubs first. Nothing is changed, nothing is sold, and the numbers become the reference point everything else is compared against.
3
Shaft Shortlist
We pull candidates from the profile board — usually three, never fifteen — and put them in test heads at your length so the only variable that changed is the shaft.
4
Head and Setup Work
Loft, lie, weighting, and grip size get resolved last, once the shaft decision is stable. Doing it in the other order means re-testing everything twice.
5
Build and Verify
Assembly happens in-house on the same floor, then every finished club is re-measured and written onto your card before pickup.
Components on the rack
Open Rack, No House Shaft
We hold no exclusive agreement with any manufacturer, which means the shortlist is drawn from whatever fits, not from whatever we are behind on.
FJFujikuraWood and hybrid profiles
NPNipponStepped steel iron shafts
KBKBSIron and wedge sections
GPGolf PrideGrips and build-up work
★★★★★
“They handed me a card showing my old 6-iron was fourteen CPM out of step with the 7. I had been blaming my transition for two years. Nobody had ever put a number in front of me before.”
DR
Dennis RoweIron fitting, Webster Groves
★★★★★
I came in for a driver and left with a driver I actually understand. The trim spec was explained while it was being cut, not summarised afterward.
AT
Alina TerrellDriver fitting, Maplewood
★★★★★
Told me two of my wedges were fine and only the gap wedge needed work. First fitting I have been to that talked me out of spending money.
MK
Martin KovalWedge fitting, Kirkwood
From the trim log
Notes We Write for Ourselves First
Bench notes, published as-is. No listicles, no gear reviews, no affiliate links.
What a Full-Length Profile Scan Shows
Stiffness read at fixed intervals along a raw shaft tells you far more than a single flex letter ever could.
Read the noteHow to Read a Trim Chart Properly
Manufacturer trim charts are precise documents that get skimmed like instructions on a microwave meal.
Read the noteButt CPM Is Not the Whole Shaft
A frequency reading at the grip end is one honest number about one end of a component with two ends.
Read the noteCome Find Out What Your Bag Actually Measures
Sessions run forty-five to ninety minutes depending on the category, and every one ends with numbers you keep. Send the form and we will confirm a time within one business day.