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SKU:BB100-GD-4L
PRODUCT DESCRIPTION
Upgrade your electric bass with colorful locking tuning machine heads designed for stable and precise tuning. The Guyker BB100 features a 1:22 gear ratio, all-metal construction, Dopamine color finishes, and multiple layout options for compatible bass headstocks.
Key Features
- Locking tuner design: Helps provide secure string installation and improved tuning stability for bass guitar upgrades and replacements.
- 1:22 gear ratio: Supports smooth and accurate tuning adjustment for reliable bass performance.
- All-metal construction: Built with a zinc alloy main body and steel gear components for dependable daily use.
- Dopamine color finishes: Available in multiple vibrant finishes to customize the appearance of your bass hardware.
- Multiple layout options: Available in 4L, 4R, 2R+2L, 1R, 1L, 3R+DD-R, and 1DD-R configurations.
- Fitment reminder: Please verify your headstock layout, tuner direction, peg hole size, string post diameter, and mounting dimensions before ordering.
Technical Specifications
| SKU / Model | BB100 |
| Product Type | Locking Bass Tuning Machine Heads |
| Suitable For | Electric Bass |
| Material | Zinc Alloy Main Body, Steel Gear Components |
| Gear Ratio | 1:22 |
| Weight | Approx. 65 g / piece |
| Layout Options | 4L, 4R, 2R+2L, 1R, 1L, 3R+DD-R, 1DD-R |
| Overall Length | 77.95 mm |
| Body Length | 30.7 mm |
| Body Width | 19.3 mm |
| Body Height | 43.1 mm |
| Lever Thickness | 1.5 mm |
| Mounting Hole Width | 13 mm |
| String Post Diameter | Ø8.5 mm |
| Peg Hole Requirement | Ø13.8 mm |
| Color / Finish Options | Chrome, Black, Gold, Blue, Red |
| Package Includes | Varies by Selected Layout Option |
Compatibility Notes
Important: Please check your bass before ordering. Headstock layout, tuner direction, peg hole size, string post diameter, mounting dimensions, and installation structure may vary between bass models.
Package Includes
- Package quantity varies depending on the selected layout option.
- 4L option: 4 x L locking bass tuners with matching hardware
- 4R option: 4 x R locking bass tuners with matching hardware
- 2R+2L option: 2 x R and 2 x L locking bass tuners with matching hardware
- 1R option: 1 x R locking bass tuner with matching hardware
- 1L option: 1 x L locking bass tuner with matching hardware
- 3R+DD-R option: 3 x standard R tuners and 1 x Drop D Xtender tuner with matching hardware
- 1DD-R option: 1 x Drop D Xtender tuner with matching hardware
Installation Note
Before installation: Compare the Ø13.8 mm peg hole requirement, Ø8.5 mm string post diameter, 13 mm mounting hole width, and selected layout 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 BB100 Bass Locking Tuners Dopamine Color for Electric Bass
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