Guyker G-tuner-077-BB101-red2R2L Bass Tuners, Red 2R + 2L, 1:22 Ratio

Some bass repairs call for a full hardware change, others only need replacement tuning machines in the existing layout. The Guyker BB101 set pairs a red finish with a 2R + 2L arrangement and a 1:22 gear ratio. Replacing worn or broken pegs? This set is intended for electric Jazz Bass or Precision-style instruments, with mounting hardware included.

What stands out

The defining details are the right-and-left tuner configuration and the fine 1:22 gear ratio. Guyker describes these as open-gear bass tuning machines, with zinc alloy housings and metal knobs. The ratio provides finer adjustment at the key than a lower-ratio design, which can be useful when bringing strings to pitch in small increments, it does not, by itself, confirm that the tuners will fit a particular bass.

The red finish is a visible choice, rather than a neutral chrome or black look. That may matter if you are matching other hardware or intentionally changing the instrument’s appearance. The set is described for four-string electric basses, including Jazz and Precision instruments, but the fit depends on the instrument’s mounting layout and dimensions.

Highlights

This is a replacement-oriented set, not a complete bass upgrade package. It is aimed at players repairing old or broken tuning pegs, or replacing a set while keeping a conventional bass-tuner format. The package includes screws, bushings, and washers, so the listed mounting pieces are part of the purchase rather than an extra item to source separately.

A practical use case is replacing damaged tuners during a restring or setup, when the instrument’s existing hardware is already being removed. The 2R + 2L layout identifies the orientation of the machines, and the included hardware can help with installation. The manufacturer also describes the gears as lubricated, no specific maintenance interval or installation tool is provided in the supplied details.

Compared with choosing tuners primarily for a different layout or a particular instrument’s measurements, this set is most relevant when its 2R + 2L arrangement matches the bass being repaired. A solid pick if you need that configuration, want a red finish, and are replacing existing bass tuning keys rather than selecting unrelated hardware. It may not suit you if your instrument requires a different tuner orientation or mounting dimensions.

How to use it

Before ordering, compare the product’s parameter drawing with the bass’s tuner positions and mounting dimensions. The supplied product details do not list those measurements, so the 2R + 2L description alone is not enough to confirm a fit. During installation, the manufacturer recommends lubricating screw threads with cutting lubricant, wax, or a bar of soap to help reduce friction as they are threaded. That instruction concerns the mounting screws, it is not a direction to add lubricant to the tuner gears.

Should you buy it?

Choose the Guyker BB101 set when you are replacing bass tuners and have confirmed that the red 2R + 2L configuration and mounting dimensions match your instrument. Its 1:22 ratio and included screws, bushings, and washers make the intended use clear: a focused replacement for compatible four-string electric basses. If you are selecting parts for a new installation or a different tuner arrangement, base the decision on the parameter drawing rather than the Jazz or Precision description alone.