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SKU:GB200-CR-1R
PRODUCT DESCRIPTION
Upgrade your bass with smooth, precise tuning performance. This CNC-machined bass tuner features a 1:22 high-precision gear ratio and is designed for bass replacement, repair, and custom build projects.
Key Features
- CNC-machined construction: Built for clean tolerances, dependable replacement performance, and a precise all-metal feel.
- 1:22 gear ratio: Provides smoother and finer tuning adjustment for accurate bass setup.
- Durable material combination: Features an aluminum alloy housing and key, steel gears, and iron post, rear cover, and latch.
- Multiple package options: Available in 1R, 1L, 2R+2L, 4R, and 4L options to match different bass headstock layouts.
- Custom finish choices: Offered in Aluminum Anodized Chrome, Black, Red, and Green for repair projects and custom bass builds.
- Fitment reminder: Please confirm your bass headstock’s tuner orientation, peg hole diameter, and mounting screw hole spacing before ordering.
Technical Specifications
| SKU / Model | GB200 |
| Product Type | Bass Tuner |
| Suitable For | Bass guitar replacement, repair, and custom build projects |
| Layout Options | 1R, 1L, 2R+2L, 4R, 4L |
| Gear Ratio | 1:22 |
| Housing Material | CNC-machined aluminum alloy |
| Key Material | CNC-machined aluminum alloy |
| Gear Material | Steel |
| Post / Rear Cover / Latch Material | Iron |
| Weight | Approx. 84 g per piece |
| Overall Length | 92 mm |
| Plate Length | 46.4 mm |
| Plate Top Width | 46 mm |
| Top Mounting Hole Spacing | 33.6 mm center to center |
| Bottom Mounting Hole Spacing | 25.6 mm center to center |
| Overall Height | 43.85 mm |
| Rear Plate Thickness | 2 mm |
| String Post Length | 31.1 mm |
| String Post Diameter | Ø14 mm |
| String Hole Center Height | 21 mm |
| Bushing Outer Diameter | Ø22 mm |
| Peg Hole Requirement | Ø17.4 mm |
| Button Width | 41 mm |
| Color Options | Aluminum Anodized Chrome, Aluminum Anodized Black, Aluminum Anodized Red, Aluminum Anodized Green |
| Package Options | 1R, 1L, 2R+2L, 4R, 4L |
Compatibility Notes
Important: Please check the measurements of your bass before ordering. This tuner requires a Ø17.4 mm peg hole and uses 33.6 mm / 25.6 mm mounting screw hole spacing. Tuner orientation, screw hole position, and headstock layout may vary by bass model, production year, factory, or region. Minor modification may be required depending on your existing hardware.
Package Includes
- Package quantity varies depending on the selected package option.
- 1R option: 1 x right-side bass tuner machine head with matching mounting screws, bushing, washer, and nut
- 1L option: 1 x left-side bass tuner machine head with matching mounting screws, bushing, washer, and nut
- 2R+2L option: 2 x right-side bass tuner machine heads and 2 x left-side bass tuner machine heads with matching mounting screws, bushings, washers, and nuts
- 4R option: 4 x right-side bass tuner machine heads with matching mounting screws, bushings, washers, and nuts
- 4L option: 4 x left-side bass tuner machine heads with matching mounting screws, bushings, washers, and nuts
Installation Note
Before installation: Compare the peg hole diameter, string post size, mounting screw hole spacing, and tuner orientation with your original bass tuner to confirm compatibility.
Size Reference
Important: Please refer to the size chart below and compare all dimensions with your original part before ordering.


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FAQS
Do you class a reverse headstock guitar as a left hand guitar?
How do I determine the right size/fit for a specific accessory?
Can you provide more details about the materials used in your products?
At Guyker, we prioritize the use of high-quality materials to ensure the durability and performance of our products. While the specific materials used may vary depending on the accessory, we commonly utilize materials such as:
■ Metals: We often use materials like stainless steel, aluminum, and brass for hardware, bridges, and other metal components.
■ Plastics: Certain accessories may incorporate durable and impact-resistant plastics such as ABS or polycarbonate for knobs, pickguards, and other components.
■ Woods: Some accessories, like guitar knobs or picks, may be made from various types of wood, including rosewood, ebony, or maple.
For more detailed information about the materials used in a specific product, we recommend reviewing the product descriptions or reaching out to our customer support team at [support@guyker.com] for further clarification.
Do you offer international shipping?
Yes, we offer international shipping to customers worldwide. When placing your order, please ensure that you provide accurate international shipping information, including your complete address and contact details.
Please note that international shipping may be subject to customs duties, taxes, and additional fees imposed by the destination country. These charges are the responsibility of the recipient and may vary depending on the country's customs policies.
What is your process for returning or exchanging a product?
To initiate a return or exchange, please follow these steps:
■ Contact our customer support team at [support@guyker.com] or visit our website's Returns/Exchanges page.
■ Provide your order details and the reason for the return or exchange.
■ Our customer support team will guide you through the process and provide you with a return/exchange authorization if applicable.
■ Follow the instructions provided, including packaging the product securely and attaching the necessary labels or documentation.
■ Ship the product back to us using a traceable and insured shipping method.
■ Once we receive the returned product and verify its condition, we will process the return or exchange accordingly.
Can I return or exchange a product if it's been used?
In most cases, products that have been used or show signs of wear may not be eligible for return or exchange unless there is a defect or error on our part. We recommend reviewing our specific return/exchange policy or contacting our customer support team at [support@guyker.com] to determine the eligibility of your particular product.
Do I need to cover the return shipping costs?
The responsibility for return shipping costs may vary depending on the reason for the return or exchange. In some cases, such as if the product is defective or if we made an error, we will provide a prepaid shipping label or reimburse your return shipping costs. However, if the return or exchange is due to a change of mind or a non-defective product, you may be responsible for the return shipping costs. We recommend reviewing our return/exchange policy or contacting our customer support team at [support@guyker.com] for specific details regarding return shipping costs.

Guyker GB200 CNC-Machined Bass Tuner for Bass Guitar - 1:22 Gear Ratio
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