MOTOR METER RACING 85mm GPS Speedometer 3-3/8" — 0–120 MPH, IP67 Waterproof, Included Sensor

The MOTOR METER RACING 85mm (3-3/8") W Pro GPS Speedometer is a rugged, GPS-powered gauge that displays vehicle speed up to 120 MPH and logs total mileage with power-off memory.

This compact automotive speedometer combines satellite-based speed sensing with automotive-grade construction to deliver reliable readings on 12V or 24V negative-ground electrical systems. Built for marine, off-road, and custom vehicle use, it replaces traditional cable-driven units and reports speed instantly via an included GPS sender. The dial features clear white LED backlighting and a red pointer for readability day or night, while corrosion-resistant materials and an anti-fog lens protect the instrument in harsh conditions.

How accurate and responsive is the GPS speed measurement?

The speedometer uses a dedicated GPS sensor to determine vehicle velocity without mechanical linkages, meaning response is immediate and unaffected by drive-line slippage. A high-quality stepper motor drives the pointer for smooth, precise needle motion that reflects changes in speed cleanly.

• GPS-based speed sensing for cable-free accuracy
• Stepper motor delivers consistent, jitter-free needle movement
• 0–120 MPH range suitable for most road and recreational vehicles
• Included sensor and harness simplify setup and signal stability

Will this unit survive wet or salty environments?

Yes — the gauge is engineered for exposure-prone installations with an IP67 rating that defends against dust and temporary immersion. Corrosion-resistant 316 stainless steel bezel and UV-protected lens materials reduce deterioration from salt spray and sunlight.

• IP67 waterproof classification for splash and short immersion protection
• 316 stainless steel bezel resists rust in marine settings
• Anti-fog, UV-resistant convex lens maintains clarity over time
• ABS housing offers impact resistance without adding excessive weight

What readouts and memory features does it offer?

Beyond showing instantaneous speed, the unit maintains an odometer that counts up to 99,999.9 miles and retains stored values even when power is removed. The odometer supports adjustable settings and power-off memory so mileage records remain intact after shutdowns or battery changes.

• Total mileage logging up to 99,999.9 miles
• Adjustable odometer settings with non-volatile memory
• Clear black face, red needle, and white LED lighting for fast legibility
• Speed scale graduated to 120 MPH for common vehicle applications

What comes in the box and are there installation notes?

The package provides the essentials to get the gauge working: the speedometer head, GPS sender, power harness, a fastening ring, and installation instructions. It requires a negative-ground 12V or 24V electrical system and, if you need a dedicated mounting cup, the compatible W PRO 85mm mounting cups are sold separately.

• Included: gauge, GPS sensor, wiring harness, fastening ring, instructions
• Electrical compatibility: 12V / 24V negative-ground systems only
• Optional accessory: W PRO 85mm gauge mounting cup (sold separately)
• One-year warranty against manufacturing defects and lifetime tech support

Who is this for: This MOTOR METER RACING 85mm GPS speedometer is suited for vehicle owners who want cable-free speed readouts and durable construction — ideal for boat dashboards, off-road rigs, classic cars where cable routing is impractical, and custom builds that demand a compact, weather-resistant instrument. If you need a rugged, easy-to-install speed gauge with mileage tracking and dependable performance in wet or corrosive environments, this model is designed for that use case.