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SKU:BB101-Black-4R
PRODUCT DESCRIPTION
Upgrade your electric bass with locking tuning machine heads designed for stable and precise tuning. The Guyker BB101 features a 1:22 gear ratio, all-metal construction, clover-style bass keys, and multiple layout options for compatible bass headstocks.
Key Features
- Locking tuner design: Helps provide secure string installation and improved tuning stability during performance and daily use.
- 1:22 gear ratio: Supports smooth and precise tuning adjustment for bass guitar applications.
- All-metal construction: Built with a durable metal structure for reliable long-term hardware performance.
- Clover-style bass key design: Provides a classic bass tuner appearance with comfortable operation.
- Multiple layout options: Available in 4R, 4L, 2R+2L, 1R, and 1L configurations for different bass headstock layouts.
- Fitment reminder: Please verify your headstock hole size, string post diameter, mounting layout, and tuner orientation before ordering.
Technical Specifications
| SKU / Model | BB101 |
| Product Type | Locking Bass Tuning Machine Heads |
| Suitable For | Electric Bass |
| Material | All-Metal Construction |
| Gear Ratio | 1:22 |
| Weight | About 78 g / piece |
| Button Style | Clover Key |
| Layout Options | 4R, 4L, 2R+2L, 1R, 1L |
| Overall Length | 77.95 mm |
| Overall Height | 42.4 mm |
| Housing Length | 19.3 mm |
| Housing Height | 30.7 mm |
| Mounting Base Width | 13 mm |
| Button Size | 40.2 mm |
| Minimum Headstock Hole Size Required | Ø15.7 mm |
| String Post Diameter | Ø12.7 mm |
| Color / Finish Options | Blue+Chrome, Red+Gold, Chrome, Black, Gold |
| Package Includes | Locking Bass Tuning Machine Head(s), Matching Bushing / Ferrule(s), Matching Mounting Screws |
Compatibility Notes
Important: Please check your bass before ordering. Headstock hole size, string post diameter, mounting layout, tuner orientation, and installation structure may vary between bass models and production years.
Package Includes
- Package quantity varies depending on the selected layout option.
- 4R option: Locking bass tuning machine heads with matching hardware
- 4L option: Locking bass tuning machine heads with matching hardware
- 2R+2L option: Mixed R and L locking bass tuning machine heads with matching hardware
- 1R option: Single R locking bass tuning machine head with matching hardware
- 1L option: Single L locking bass tuning machine head with matching hardware
Installation Note
Before installation: Compare the Ø15.7 mm headstock hole requirement, Ø12.7 mm string post diameter, mounting layout, and tuner orientation with your original bass tuners to confirm compatibility.
Size Reference
Important: Please refer to the size chart below and compare all dimensions with your original bass tuner 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 BB101 Locking Bass Tuning Machine Heads Clover Key Tuners
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