G-Shock & Pro Trek / Head to head
Pro Trek vs G-Shock: the same Casio sensors, split by 30 grams and 100 meters
Casio sells the triple sensor and Tough Solar in two lines. The Pro Trek is the light one; the Master of G G-Shock is the sealed one. Which you should buy depends on how wet and how muddy your season gets.
By Mike M.Updated Spec-sheet researched, not worn by us
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The contenders
Side by side
Stock photoPro Trek, with radio time
Casio Pro Trek PRW-61
Solar, no charger8.1 /1062 g, 14.7 mm, 100 m, solar, five radio signals, triple sensor, double LED.
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- Stock photo
G-Shock, the fair match
G-Shock Mudman GW-9500
Solar, no charger8.2 /1081 g, 14.8 mm, 200 m, mud-resistant, solar, Multi-Band 6, triple sensor, sunrise/sunset.
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- Stock photo
Pro Trek, the light one
Casio Pro Trek PRG-340
Solar, no charger8.0 /1054 g, 100 m, solar, triple sensor, no radio time.
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- Stock photo
G-Shock, the proven one
G-Shock Rangeman GW-9400
Solar, no charger8.7 /1093 g, 18.2 mm, 200 m, mud-resistant, solar, Multi-Band 6, sunrise/sunset, cold-rated.
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Verdict
Specs that differ
What is identical
Tough Solar with a rechargeable cell; a compass, barometer, altimeter and thermometer (Casio states ±10° direction and ±3 hPa pressure accuracy on the PRW-61 and GWG-2000 guides, with the same altitude range on the PRW-61, GW-9400 and GW-9500); radio time calibration on the PRW-61, GW-9400 and GW-9500 (the PRG-340 has none); mineral crystal on all four. The sensor watch inside is the same family of Casio module.
Thirty grams
PRG-340, 54 g. PRW-61, 62 g. Mudman, 81 g. Rangeman, 93 g. On a wrist, 30 grams is the difference between a watch you forget and one you feel on a long day, and the Pro Trek's biomass-plastic case and slimmer module are where it comes from. The Mudman closes the gap to 19 g against the PRW-61 with the same thickness, which is why it is the fair fight and why it exists.
One hundred meters and the mud seals
Both Pro Treks are 100 m; both G-Shocks are 200 m with mud-resistant button seals. For rain, sweat, a swim and a shallow ford, 100 m is fine. For a watch that spends a season in a duck blind, a bog or a sandstorm, the seals are the difference between buttons that click and buttons that grind. Casio lists low-temperature resistance to -10°C on both the PRW-61 and the GW-9400, so the cold is a draw.
Who should buy neither
Anyone who wants a recorded track: a Garmin Instinct 3 Solar. Anyone who wants sapphire on a Casio: the Mudmaster GWG-2000. Anyone who wants the lightest ABC watch with a red backlight for night vision: the Suunto Core Alpha, in the ABC watch rankings.
In detail
The contenders, in full
Stock photoPro Trek, with radio time
Casio Pro Trek PRW-61
62 g, 14.7 mm, 100 m, solar, five radio signals, triple sensor, double LED.
EvidenceResearched · not worn by us
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Approximately 6 months with no light (Casio's stated usage conditions) |
| Power | Solar panel and one rechargeable battery |
| Bezel & case | Biomass plastics case |
| Water rating | 100 m |
| Sensors | Direction, pressure/altitude and temperature sensors; radio time calibration (JJY, WWVB, MSF, DCF77, BPC); double LED light |
| Weight | 62 g |
| Size | 51.0 × 47.4 × 14.7 mm |
| Operating temp | Low-temperature resistance to -10°C (14°F) |
How the 8.1 score breaks down
- Battery & power independence (25%)
- 9
- Durability of materials (25%)
- 6
- Serviceability & lifespan (20%)
- 9
- Field usability (15%)
- 8
- Value per decade (10%)
- 9
- Mission fit (5%)
- 8
What the spec sheet supports
- Solar, atomic and triple sensor at 62 g and 14.7 mm.
- Cleaner dial and a proper altimeter graph for hikers.
Where it falls short
- 100 m and no mud-resistant buttons; it is a hiking watch, not a Mudman.
- Mineral glass.
Skip this if…
…your watch gets buried in mud or dunked regularly; the G-Shock Mudman is the sealed version of this idea.
#ad · Price set by Amazon · Disclosure for the link to Casio Pro Trek PRW-61
Stock photoG-Shock, the fair match
G-Shock Mudman GW-9500
81 g, 14.8 mm, 200 m, mud-resistant, solar, Multi-Band 6, triple sensor, sunrise/sunset.
EvidenceResearched · not worn by us
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Approximately 6 months with no light (Casio's stated usage conditions) |
| Power | Solar panel and one rechargeable battery |
| Glass | Mineral |
| Bezel & case | Carbon, resin and bio-based resin |
| Water rating | 200 meters; shock resistant; mud resistant |
| Sensors | Digital compass, altimeter, barometer, thermometer; sunrise/sunset times |
| Weight | 81 g |
| Size | 56.7 × 52.7 × 14.8 mm |
How the 8.2 score breaks down
- Battery & power independence (25%)
- 9
- Durability of materials (25%)
- 7
- Serviceability & lifespan (20%)
- 9
- Field usability (15%)
- 7
- Value per decade (10%)
- 9
- Mission fit (5%)
- 9
What the spec sheet supports
- 3.4 mm thinner and 12 g lighter than the Rangeman GW-9400 by the published figures.
- Mud-resistant buttons and a carbon-reinforced case.
- Sunrise/sunset and a barometer graph for reading weather in a stand.
Where it falls short
- Six months of stated dark-running versus the Rangeman's eight.
- Mineral crystal.
Skip this if…
…you want the longest-proven G-Shock module; the Rangeman has a decade more history behind it.
#ad · Price set by Amazon · Disclosure for the link to G-Shock Mudman GW-9500
Stock photoPro Trek, the light one
Casio Pro Trek PRG-340
54 g, 100 m, solar, triple sensor, no radio time.
EvidenceResearched · not worn by us
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Up to 7 months while used, up to 27 months in power save, with no light |
| Power | Tough Solar |
| Bezel & case | Biomass plastics |
| Water rating | 100 meters |
| Sensors | Triple Sensor Version 3: pressure (altimeter/barometer), compass, thermometer |
| Weight | 54 g (urethane band) |
| Size | 54.7 × 51.7 × 15.1 mm |
How the 8.0 score breaks down
- Battery & power independence (25%)
- 9
- Durability of materials (25%)
- 6
- Serviceability & lifespan (20%)
- 9
- Field usability (15%)
- 7
- Value per decade (10%)
- 10
- Mission fit (5%)
- 7
What the spec sheet supports
- Twenty-seven months in power-save mode is the longest stated figure of any Casio here.
- Lightest triple-sensor watch on the site at 54 g.
Where it falls short
- No Multi-Band 6; you set the time yourself.
- 100 m, mineral glass, no mud resistance.
Skip this if…
…you want the time to set itself; the PRW-61 adds radio calibration for the difference.
#ad · Price set by Amazon · Disclosure for the link to Casio Pro Trek PRG-340
Stock photoG-Shock, the proven one
G-Shock Rangeman GW-9400
93 g, 18.2 mm, 200 m, mud-resistant, solar, Multi-Band 6, sunrise/sunset, cold-rated.
EvidenceResearched · not worn by us
| Power class | Solar, no charger. A solar cell that recharges from any light and never meets a charger. The rechargeable cell is a watchmaker-replaceable part. |
|---|---|
| Battery (cell) | Approximately 8 months from full charge to Level 4 with no light (Casio's stated usage conditions) |
| Power | Solar panel and one rechargeable battery (Tough Solar) |
| Glass | Mineral crystal |
| Water rating | 200 meters |
| Sensors | Digital compass, barometer, altimeter, thermometer; sunrise/sunset; Multi-Band 6 time calibration (WWVB, DCF77, MSF, JJY, BPC) |
| Weight | 93 g |
| Size | 55.2 × 53.5 × 18.2 mm |
| Operating temp | Low-temperature resistance -10°C (14°F) |
How the 8.7 score breaks down
- Battery & power independence (25%)
- 10
- Durability of materials (25%)
- 7
- Serviceability & lifespan (20%)
- 10
- Field usability (15%)
- 7
- Value per decade (10%)
- 10
- Mission fit (5%)
- 8
What the spec sheet supports
- Solar and atomic: it sets itself from a radio signal and never sees a cable.
- A module that has been in production for over a decade; parts, straps and bezels are everywhere.
- Sunrise/sunset on the watch, the one hunting feature the Garmin Instinct does without a phone.
Where it falls short
- Mineral crystal, not sapphire; the Rangeman lives behind a raised bezel for a reason.
- No GPS, no maps, no heart rate. It tells you where north is, not where you are.
- Big and thick at 18.2 mm.
Skip this if…
…you want a track of where you walked; an ABC watch measures the world, it does not map it.
#ad · Price set by Amazon · Disclosure for the link to G-Shock Rangeman GW-9400
How we scored this
Watches we claim to have worn or tested: 0
Plenty of sites say they took every watch up a mountain. We didn't, and we say so. What we do instead: read the maker's own battery table mode by mode, check what the lens and case are actually made of, note the water rating and whether a MIL-STD-810 claim exists, ask how long the maker keeps updating the line, and score every pick on a public rubric weighted for a decade of ownership. Every figure links to where it came from.
Scores are editorial judgments from that documented research, not test results. Commissions never set a score or decide a pick. The rubric and its weights are published.
Questions
Frequently asked
Is Pro Trek a G-Shock?
No. Both are Casio lines with Tough Solar and the triple sensor; the Pro Trek is the lighter hiking line at 100 m without mud seals, and the G-Shock Master of G models are 200 m with sealed buttons.
Which is better for hiking, Pro Trek or G-Shock?
Pro Trek for weight (62 g PRW-61); G-Shock for water and mud (200 m Mudman or Rangeman). Same sensors, same solar, same radio time on the PRW-61 and the G-Shocks.
Does the Pro Trek have sunrise/sunset?
Casio's PRW-61 specifications page we read lists the sensors, world time, alarms and illumination; sunrise/sunset is listed in the Rangeman GW-9400 and Mudman GW-9500 guides.
Keep reading
Related on Bezel & Bearing
Receipts
Sources
- Casio — Operation Guide, module 5673 (Pro Trek PRW-61), Specifications (checked 2026-09-20)
- New Atlas — Casio Pro Trek PRW-61 announcement (size, weight, water rating, battery) (checked 2026-09-20)
- G-Central — Pro Trek PRG-340 announcement (size, weight, water rating, battery) (checked 2026-09-20)
- Casio — Operation Guide, module 3553 (GW-9500 Mudman), Specifications (checked 2026-09-20)
- G-Central — G-Shock GW-9500 Mudman spec sheet (checked 2026-09-20)
- Casio — Operation Guide, module 3410 (GW-9400 Rangeman), Specifications (checked 2026-09-20)
- Pilot Mall — Casio G-Shock Rangeman GW9400-1 listing (case size, weight, water rating) (checked 2026-09-20)
- Casio — Operation Guide, module 5678 (GWG-2000 Mudmaster), Specifications (checked 2026-09-20)
We don't own or wear-test these watches and we don't pretend to. Battery, glass, case and water figures come from the maker's own owner's manuals, spec pages and press releases (linked on every product), and where a figure isn't published we say so. Prices are set by Amazon and change often, so we don't print them. Read the full method.