If you buy from a link, I may earn a commission.

G-Shock Mudmaster: Metal Bezel or Carbon Fiber?

by

G-Shock introduced a metal bezel to the updated Mudmaster GGB100 line, with the GGB100XM, where “M” stands for metal. (We still don’t know what “X” stands for.) But some models still kept the Carbon Fiber bezel. Which bezel is better based on real world usage, metal or carbon fiber?

Tim Johnson from the Real Ideal Gear youtube channel joined me at the Kinkade compound in Texas to compare and contrast the two bezel materials. He brought his carbon bezel G-Shock GGB100X-1A3 so we could compared them side by side.

Metal

For all of my years working in heavy industry, there’s one thing I’ve noticed. Metal is strong.

Tractor trailer trucks are made of metal. Drilling rigs too. Hammers and wrenches. Metal. Notice a pattern? Strength.

So when G-Shock took it’s brittle carbon fiber bezel off the Mudmaster GGB100 and forged a metal replacement, they were taking a huge leap forward in the strength of the enclosure of its mud-resistant analog watch (with a digital subdial.)

I don’t think that’s a lesson you can learn in engineering school. That’s from practical real world experience. Obviously G-Shock got the idea of a metal bezel not from referencing some crusty, dusty materials data book, but by watching me aggressively and deliberately abuse their precious little watches on my YouTube channel.

Carbon Fiber

Ok, so carbon fiber looks cool. Guys who drove riced-out sports cars in the 2000’s thought so. But they also liked loud exhausts and LED undercarriage lights.

What functional advantage does Carbon Fiber have?

It’s lighter. Watch our video. I held the metal bezel Mudmaster in one hand and the carbon fiber bezel Mudmaster in the other. The metal on was heavier. Tim Johnson tried the same experiment. Same results. So my findings are peer-reviewed.

But what about strength? Can carbon fiber compete with metal in strength?

To answer this question I turned to Stockton Rush, CEO of OceanGate, which uses carbon fiber in the hull of its submarines that dive to extreme depths to view the Titanic. Oh, wait. I’m getting word he passed away in a submarine implosion.

That settles it. Metal is better.

Video Summary

Tim and I covered a lot of material in our discussion about the Mudmaster. To summarize it, I fed the video to Google’s Gemini AI. Here’s what it generated:

Casio G-Shock Mudmaster: Metal vs. Carbon Fiber Bezel (GGB100 vs. GGB100XM Showdown)

When choosing a Casio G-Shock Mudmaster, one of the most critical decisions comes down to the bezel architecture: do you go with the lightweight, motorsport-inspired carbon fiber bezel or step up to the rugged, high-impact metalbezel?

In this head-to-head field comparison, Jim Kinkade welcomes special guest Tim Johnson to break down real-world durability, cosmetic damage, tactile ergonomics, and sensor functionality across the GGB100 Mudmaster series.

Durability & Impact Resistance: The Bezel Debate

Both watch bezels sit as protective outer shells over a shock-resistant resin structure, but their materials react very differently under hard work and everyday abuse:

  • The Scratch & Gouge Reality on Carbon Fiber: Tim’s carbon fiber Mudmaster sustained a heavy impact directly over the “SHOCK” bezel lettering. Because the carbon fiber is encased beneath a clear resin overlay, the impact produced a permanent, cloudy white gouge resembling a deep scar. Unlike solid black resin—which retains its color when scratched—or raw metal that can be buffed out, scratched clear-coated resin permanently shows the damage.
  • Impact Resilience of Metal: Jim’s GGB100XM features a stainless steel bezel with brushed matte flats and polished inner chamfers that catch the light without appearing overly flashy. While heavy hits might scuff painted coatings, solid metal deforms or dents rather than fracturing or clouding up, making it far more forgiving for industrial wear and heavy equipment operation.
  • The Weight Difference: While the carbon fiber bezel variant is technically lighter, the difference on the wrist is minimal. The metal bezel version retains a solid, planted feel without excessive top-heavy flop.
  • Aesthetic Options: For buyers who want the superior impact resilience of steel without high-contrast shine, Casio also offers a stealthy gunmetal finish alongside the silver and carbon fiber variants.

Mudmaster Functionality: Quad Sensor & Everyday Operation

Beyond bezel cosmetics, the GGB100 platform packs a full utility suite designed for harsh environments:

  • Quad Sensor Capabilities: Incorporates Casio’s Triple Sensor (Altimeter, Barometer, Digital Compass, and Thermometer) plus a dedicated step counter, providing basic activity tracking alongside outdoor telemetry.
  • App Connectivity vs. Multiband 6: The GGB100 series relies on a central dedicated Bluetooth button to sync with the Casio smartphone app for automatic time calibration, step tracking data, and location logs, rather than atomic radio timekeeping (Multiband 6).
  • Button Ergonomics & Wrist Flex: The oversized, knurled pushers stand proud for easy operation with bare hands. However, wearers with thick wrists or those wearing heavy work gloves with velcro cuffs need to be mindful of accidental button actuations during deep wrist flexion—a contrast to the protected, recessed button guards found on higher-tier Mudmaster models like the GWG-B1000.

Mudmaster vs. Higher-End Master of G Comparisons

During the discussion, Jim and Tim also highlight key distinctions between the GGB100 and flagship models like the GWG-B1000 and Gravitymaster:

  • Solar Power: The GGB100 runs on standard replaceable coin cells to power its sensors, whereas the GWG-B1000 incorporates Casio’s Tough Solar charging system.
  • Screw-Down Crown Operation: Unlike the GGB100’s all-pusher interface, the GWG-B1000 and Gravitymaster GR-B300 utilize a locking screw-down crown for setting timers, adjusting time zones, and performing manual sensor calibrations.

The Verdict

If you strictly baby your watch or prefer an ultra-tactical, military olive-drab colorway with subtle amber accents, the carbon fiber Mudmaster delivers undeniable curb appeal. But for anyone working in heavy industry, construction, or demanding field conditions where tools and equipment bang into the wrist daily, the metal bezel Mudmaster GGB100XM is the definitive winner for long-term durability and peace of mind.

Conclusion

If you want the metal bezel Mudmaster GGB100XM, click here.

If you want the carbon fiber bezel Mudmaster GGB100X-1A3, click here.

My choice is the metal bezel. Tim chose the carbon fiber, and while he saw some good points to the metal bezel, he seemed happy enough with the carbon fiber bezel. So the choice is yours! Let me know what you decide.

Leave a Comment