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4.1 — Terminology & Concepts
4.2 — Creating a Spec Sheet
4.4 — Finger Measurements
4.5 — Thumb Measurements
4.6 — Oval Thumb
4.1.1 Acronyms Used in Spectre Cloud
📐 Acronyms Used in Spectre Cloud Beyond the three primary span type acronyms, Spectre Cloud uses a number of additional shorthand terms throughout its interface. The following reference covers the most commonly encountered. Acronym Full Name Where Us...
4.1.2 Span types explained: F, C, O, H
4.1.2 concept The span type setting on a Spectre Cloud spec sheet defines the measurement convention used to record the distance between the finger holes and the thumb hole. Choosing the right span type — and understanding what each one measures — ensures s...
4.1.3 Grip type definitions: Finger Tip vs. Conventional
4.1.3 concept A bowler's grip type defines how deeply their fingers are inserted into the ball — and it is one of the most consequential decisions in a pro shop fitting. Grip type determines the standard span, pitch, bridge, and insert values that apply to ...
4.1.4 Pitch terminology
4.1.4 concept Pitch is the angle at which a finger or thumb hole is drilled relative to the ball's center. It affects grip comfort, how securely the ball is held through the swing, and how cleanly it releases. In Spectre Cloud, you set pitch for each hole u...
4.1.5 Bridge: standard bridge sizes and their purpose
4.1.5 concept The bridge is the distance between the near edges of the middle and ring finger holes on a drilled ball — the strip of material, or land area, that holds the two finger holes apart. It's one of the smallest measurements on a spec sheet, but it...
4.1.6 Insert OD: drill bit sizing for STD and VACU grips
4.1.6 concept When drilling finger holes for bowlers who use inserts, the drill bit must match the insert's Outside Diameter (OD) — the outer dimension that sets the hole size. Spectre Cloud sizes these holes for you through Autofill Insert OD (2.6.6). This...
4.2.1 Creating a blank spec sheet for a bowler
1. Access Bowler Profiles Click "Bowlers" to open the list of bowler profiles in Spectre Proshop . 2. Select Bowler Select the bowler to view the specific bowler's profile details. 3. Open Spec Sheets Addition Click "Add Spec Sheets" to begin adding...
4.2.2 Naming a spec sheet
4.2.2 step-by-step When you create a new spec sheet, Spectre Cloud lets you give it a plain-English name at the top of the sheet. This name is how you identify the sheet later — a far more useful label than relying on the created and modified dates alone. ...
4.2.3 Selecting grip type on the spec sheet
1. Access Bowler Section Click "Bowlers" to open the bowler management section in Spectre Proshop Management. 2. Select Bowler Select the bowler. 3. Click on grip type Click here to access the grip type. 4. Click on the drop down Click here to...
4.2.4 How to identify the type of grip from measurement sheet
4.2.4 step-by-step Before entering span and pitch measurements, you need to identify which grip type the bowler uses. The grip type determines how the fingers sit in the ball and which measurements are relevant. Most fitting sheets — handwritten, printed, o...
4.2.5 Cloning a spec sheet
4.2.5 TIP step-by-step When you need to make an adjustment to an existing fit, and you want to document the change in the spec sheet history, cloning a spec sheet saves time and prevents transcription errors. Instead of re-entering every measurement from ...
4.2.6 Printing a spec sheet
4.2.6 TIP step-by-step Once a spec sheet is complete, you can print it directly from Spectre Cloud to use at the drill press, hand to a colleague, or file for your records. Spectre Cloud generates a clean, formatted printout that includes all measurements...
4.3.1 Entering span measurements (F, C, O, H)
4.3.1 step-by-step Span measurements define the distance between the thumb hole and each finger hole. Spectre Cloud supports four span types, and it's important to enter values under the correct one — the number only means what it's supposed to when it's pa...
4.3.3 Ring finger 5/16" rule
4.3.3 measurement The ring finger span is often derived from the middle finger span rather than measured independently, using the 5/16" Ring Finger Rule. Spectre Cloud can apply this calculation for you through Auto-Calculate Ring Span (2.6.8), or you can...
4.4.1 Round finger holes, no inserts
1. Select Customer Account Click and select the bowler 2. Hole size Click on hole size 3. Open drop down Click here to open the drop down. 4. Select the size Click and select the size of the hole 5. Hole size Repeat the same process for the ...
4.4.2 Finger inserts
4.4.2 measurement When a bowler uses finger inserts, the spec sheet needs the insert type, the insert size (ID), and the drill bit OD for each finger. The order you enter them in matters — enter type and size first and Spectre Cloud's auto-suggestions do th...
4.4.3 STD vs. VACU
4.4.3 concept Finger inserts seat in one of two ways — STD (Standard) or VACU (Vacuum). The insert type you record on the sheet (see 4.4.2) tells Spectre Cloud how the hole is drilled. This page explains the difference. For the OD-sizing concept, see 4.1.6....
4.4.4 Oval fingers, no inserts
4.4.4 measurement For a bowler who wants an oval finger hole without inserts, Spectre Cloud replaces the round OD field with an OVAL field. There is no auto-suggestion or calculation here — it's a simple text input you annotate yourself. 🔵 The OVAL Field ...
4.4.5 Inputting pitches
4.4.5 measurement Finger pitch is entered directly into the pitch tiles surrounding each finger hole on the spec sheet. There's no direction to "select" — the tile you put the value in is the direction. This page covers how to read and enter those tiles for...
4.4.6 CLT (Center Line Transformation)
4.4.6 measurement CLT (Center Line Transformation) is a fitting measurement that captures how a bowler's finger centerline relates to the ball's grip center. Spectre Cloud uses it to derive the lateral finger pitch. This page explains the two ways CLT is ...