2.6.3 Auto-CLT — lateral pitch of fingers based on CLT chart
2.6.3 auto
Center Line Tilt (CLT) is the reference chart Spectre uses to set the lateral pitch of the middle and ring fingers when a bowler's fingers naturally angle away from the grip's center line. This page explains what CLT is, how to read the chart, and how Spectre's Auto-CLT setting applies it for you.
🎯 What Center Line Tilt Is
Most hands don't hold the ball with the middle and ring fingers running perfectly parallel to the grip's center line. Instead, the fingers fan out from the center line at an angle. Center Line Tilt is that angle — measured in degrees — and it determines how much lateral (left/right) pitch each finger needs so the holes follow the natural line of the fingers.
- ✅ A larger tilt angle means the fingers splay more from the center line.
- ✅ The middle finger and ring finger each get their own lateral pitch, in opposite directions, so the grip matches the hand.
- ✅ Getting CLT right improves comfort, release consistency, and reduces grip fatigue.
📐 Reading Diagram #1 (The CLT Chart)
The CLT chart maps five tilt lines — A through E — to their tilt angle and the resulting lateral pitch for each finger. As the angle increases from 8° to 40°, the middle finger and ring finger pitches shift in opposite directions.
🎳 For Right-Hand Bowlers
| Line | Tilt Angle | Middle Finger | Ring Finger |
|---|---|---|---|
| A | 8° |
3/8" Left | 1/2" Right |
| B | 16° |
5/16" Left | 9/16" Right |
| C | 24° |
1/4" Left | 5/8" Right |
| D | 32° |
3/16" Left | 11/16" Right |
| E | 40° |
1/8" Left | 3/4" Right |
🎳 For Left-Hand Bowlers
The left-hand chart mirrors the right-hand values — the directions flip, and the ring/middle columns swap.
| Line | Tilt Angle | Ring Finger | Middle Finger |
|---|---|---|---|
| A | 8° |
1/2" Left | 3/8" Right |
| B | 16° |
9/16" Left | 5/16" Right |
| C | 24° |
5/8" Left | 1/4" Right |
| D | 32° |
11/16" Left | 3/16" Right |
| E | 40° |
3/4" Left | 1/8" Right |
Tip: If your Spectre Flip Lateral Pitches RH/LH setting is ON, switching a bowler's hand automatically inverts these lateral pitches for you — no need to look up the opposite chart by hand.
🛠️ How Spectre Applies CLT — Auto-CLT
Rather than looking these values up manually, Spectre's Auto-CLT setting reads the tilt angle you enter for a bowler and fills in the suggested lateral pitch for each finger straight from this chart.
- ✅ Auto-CLT ON — Spectre suggests the middle- and ring-finger lateral pitches automatically from the CLT chart, saving lookup time.
- ❌ Auto-CLT OFF — no lateral pitch is suggested; you enter each finger's pitch manually from the chart above.
Worked Example — 24° Tilt (Line C)
A right-hand bowler with a 24° center line tilt falls on Line C. From the chart, Spectre suggests:
- Middle finger: 1/4" Left
- Ring finger: 5/8" Right
With Auto-CLT ON, those two values are filled in automatically the moment the tilt is set.
Related Sections
- Settings → Auto-Suggestions → Auto-CLT (section 2.6.3)
- Settings → Auto-Suggestions → Pitch Suggestion
- Settings → Auto-Suggestions → Flip Lateral Pitches RH/LH
Note: CLT sets lateral finger pitch only. Forward/reverse pitch and span are handled separately by the Pitch Suggestion and span rules.