Gateron Oil Kings vs. Boba U4T Switches: Custom Mechanical Keyboard Comparison
Question: Should a mechanical keyboard hobbyist building a custom board choose 'linear Gateron Oil Kings' or 'tactile Boba U4T switches', considering factory pre-lubrication consistency, spring bottom-out weight force in grams, and stem wobble tolerances?
Prepared by the ChoiceScore Research Desk · Editor-approved for the curated library · Reviewed August 4, 2026
Direct answer
Your choice depends entirely on whether you prefer smooth, linear switches with exceptional out-of-the-box factory lubrication (Gateron Oil Kings) or sharp, highly tactile feedback with heavier bottom-out weights (Boba U4T switches).
Summary
Building a custom mechanical keyboard requires balancing key feel, sound profiles, and build customization preferences. Gateron Oil Kings are renowned linear switches featuring an opaque black nylon housing, a smooth 55g actuation and 65g bottom-out spring, and exceptionally consistent factory pre-lubrication that minimizes the need for manual modding. Conversely, Gazzew Boba U4T switches are legendary tactile switches featuring a distinct 'D' shaped tactile bump, a prominent 62g or 68g bottom-out weight option, and exceptional stem stability that reduces wobble. This report breaks down their core specifications, pros and cons, and scenario outcomes to guide your custom board build.
Choice Score breakdown
- Factory Lubrication Quality 90/100 — Gateron Oil Kings excel here with uniform, ultra-smooth factory application.
- Tactile Feedback Profile 85/100 — Boba U4Ts offer one of the sharpest, most satisfying tactile bumps available.
- Stem Wobble Tolerance 80/100 — Both switches feature tight housing tolerances, minimizing lateral stem play.
Best for / Not best for
Best for
- Linear lovers looking for effortless switch swapping without hand-lubrication
- Typists and gamers who want a deep, muted bottom-out sound profile
- Enthusiasts who prefer tactile bumps with sharp actuation feedback
Not best for
- Those who dislike heavy linear resistance (65g bottom-out)
- Users who find tactile bumps fatiguing during long typing sessions
- Purists who prefer translucent housings for per-key RGB custom setups
Scenarios
- The Pure Linear Typist Scenario (50% likely)
Building a heavy aluminum custom keyboard for an office or quiet workspace using Gateron Oil Kings without any manual modification. - The Aggressive Tactile Enthusiast Scenario (40% likely)
Assembling a gasket-mounted custom board with Boba U4T switches to maximize typing feedback and tactile bump prominence. - The Hybrid Customization Scenario (10% likely)
Purchasing both switches to test on a hot-swappable test bench before committing to a full 104-key custom keyboard layout.
Calculations
| Metric | Result | Formula |
|---|---|---|
| Bottom-Out Force Delta | 3 grams | boba_u4t_bottom_out_weight - gateron_oil_king_bottom_out_weight |
| Estimated Modding Time Savings | 304.5 minutes | switches_count * manual_lube_time_per_switch - factory_lube_prep_time |
| Spring Weight Ratio | 0.956 | gateron_oil_king_bottom_out_weight / boba_u4t_bottom_out_weight |
Pros & cons
Pros
- Gateron Oil Kings provide buttery smooth linear actuation straight out of the box with zero required hand lubrication.
- Boba U4T switches deliver a sharp, distinct tactile bump that satisfies touch typists seeking clear feedback.
- Both switch lines feature tight housing tolerances that dramatically minimize stem wobble without requiring aftermarket films.
Cons
- Gateron Oil Kings feature an opaque black housing that obscures per-key RGB backlighting effects.
- Boba U4T tactile switches can cause finger fatigue during marathon typing or gaming sessions due to their strong tactile profile.
- Both switches sit at a higher price tier compared to budget-grade stock switches, increasing overall custom board build costs.
Assumptions
- Gateron Oil King Bottom-Out Weight: 65 grams — Standard manufacturer specification for Gateron Oil King linear switches.
- Boba U4T Bottom-Out Weight: 62g or 68g options — Standard Gazzew spring variants available for Boba U4T tactile switches (modeled here using the 68g variant for comparison).
- Standard Board Layout: 87 keys (TKL) — Standard benchmark layout used for calculating modding time and switch quantities.
Practical next steps
- Determine your primary use case: select linear switches for fast, fluid gaming and typing or tactile switches for precise, feedback-driven typing.
- Check your custom board's plate and PCB compatibility to ensure 5-pin switch support or whether you need to clip plastic mounting pins.
- Review your bottom-out weight preference (65g for Oil Kings vs 68g for Boba U4Ts) to match your finger typing strength.
- Evaluate whether you prefer an opaque housing with deeper acoustic resonance (Oil Kings) or custom tactile stems with crisp bottom-outs (Boba U4Ts).
- Purchase a small sample pack of 5 switches of each type to test on a hot-swap switch tester before committing to a full keyboard batch.
Methodology
This decision report was compiled by analyzing key mechanical keyboard specifications, including factory pre-lubrication consistency, spring bottom-out weight force in grams, and stem wobble tolerances. We synthesized community feedback, structural design differences between linear and tactile stems, and quantitative modding time metrics to provide an objective, actionable comparison for custom board hobbyists.
Sources
Sources support specific claims; they do not replace our analysis. Read the research and source standards.
- Background context for "Should a mechanical keyboard hobbyist building a custom board choose 'linear Gateron Oil Kings' or 'tactile Boba U4T switches', considering factory pre-lubrication consistency, spring bottom-out weight force in grams, and stem wobble tolerances?"
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FAQ
- Do Gateron Oil Kings require hand lubrication after purchase?
- No. Gateron Oil Kings are widely praised in the mechanical keyboard community for having some of the best factory pre-lubrication in the industry, making hand-lugging entirely optional.
- Are Boba U4T switches louder than Gateron Oil Kings?
- Yes. Boba U4Ts produce a distinct, loud 'thock' sound characterized by their unique tactile leaf and pole design, whereas Oil Kings offer a more muted, deeper acoustic signature.
- Do I need switch films for either Gateron Oil Kings or Boba U4T switches?
- Generally no. Both switches feature exceptionally tight factory housing tolerances that keep stem wobble to an absolute minimum, rendering aftermarket switch films mostly unnecessary.
Related decisions
- How do Gateron Oil Kings compare to Cherry MX Blacks for custom builds?
- Are Gazzew Boba U4T switches better than Holy Pandas for tactile typing?
- What is the best spring weight for custom mechanical keyboard switches?
Disclaimers
Switch feel, acoustic profiles, and tactile preferences are subjective and can vary based on your keyboard's plate material, mounting style, and keycap profile.
Ensure you verify pin compatibility (3-pin vs 5-pin) with your custom circuit board before purchasing large quantities of switches.