Detail 01
Gear ratios: 36:1, 30:1, 20:1, and 18:1
The tuners use different ratios to account for the different string gauges.
Product detailSKU #1500000398427
Graph TechRatio 4-In-Line Bass Y-Style Button Chrome 4 String
Independent shopping perspective
The Korena take
Built for right-handed 4-string basses with a 4-in-line headstock, these Ratio machine heads use string-specific gear ratios so each tuner responds consistently to the same adjustment. In practical tuning, a half turn moves each string by a semitone. The double-envelope gearing and hardened steel gears are designed for smooth, precise operation, while the chrome Y-style buttons give the set its finished appearance.
Strong match
Who this is for
- Replacing tuners on a right-handed 4-string bass with a 4-in-line headstock.
- Players who want the same tuning adjustment to produce a consistent result across all four strings.
Consider the trade-offs
When to look elsewhere
- Basses that are not right-handed, do not use four strings, or lack a 4-in-line tuner layout.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
35/64 in. (14 mm) required peg holes
Your bass headstock holes need this diameter for installation.
Detail 03
0.547 in. (13.9 mm) string-post diameter
Use this measurement when checking the existing tuner-hole and post arrangement.
Detail 04
1.030 in. (26.1 mm) post length to string hole
This is the listed post measurement for comparing against your current tuners.
Final check
Know before you order
- 01Confirm that your bass is right-handed, has four strings, and uses a 4-in-line headstock.
- 02Measure the peg holes; these machine heads require 35/64 in. (14 mm) holes.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What does a half turn do?
A half turn changes the pitch by one semitone.
02Are all four tuners geared the same?
No. The set uses 36:1, 30:1, 20:1, and 18:1 ratios to account for different string gauges.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsPlayability
- String Post Diameter
- 0.547 inch (13.9mm)
- String Post Length to String Hole
- 1.030 inch (26.1mm)
1 detailsSize & weight
- Peg Holes Diameter Required
- 35/64 inch (14mm)
1 detailsOther
- Gear Ratio
- 36:1, 30:1, 20:1, 18:1
