Iron Spear Outfitters
Maximus Mobile: Unbreakable NiTi NMO Dual-Band Antenna (2m/70cm)
Maximus Mobile: Unbreakable NiTi NMO Dual-Band Antenna (2m/70cm)
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Offroad radio antenna / overland NMO dual-band — Maximus Mobile is Iron Spear Outfitters’ vehicle NMO whip for 2m/70cm. Heavy-duty 3mm NiTi/nitinol, handmade in Idaho. Built for hard work.
Vehicle NMO — not an HT whip
Handheld BNC stays on Maximus, Guardian, and Minimus. Maximus Mobile is the roof / vehicle-mount path in the same matrix.
Stop relying on flimsy fiberglass sticks that snap in brush, or soft metal whips that take a permanent bend after one hard hit. Maximus Mobile uses ultra-thick 3mm Nickel Titanium (Nitinol) so the element can take trail strikes and spring back toward true — everyday NiTi spring-back resilience, not mil-spec theater. “Unbreakable” here means spring-back / trail abuse resilience only.
Sized for civilian offroad, overland, and mobile ham / GMRS vehicle setups that need a dual-band NMO on a proper vehicle ground plane. About 2.75 oz. Pre-tuned for dual-band (2m/70cm) on a typical vehicle center-roof ground plane — always verify SWR on your install.
Mag mount sold separately.
Warning: High SWR can damage your radio. While pre-tuned for standard vehicle center-roof mounting, always verify your antenna system’s SWR before transmitting — individual vehicle ground planes vary.
Quick facts
- Mount: NMO (mobile / vehicle)
- Bands: Dual-band 2m / 70cm
- Element: Heavy-duty 3mm NiTi / nitinol
- Weight: 2.75 oz
- Mag mount: Sold separately
- Warranty: Iron Spear Lifetime Warranty
Pair it with / shop next
- Maximus dual-band HT antenna (BNC) — handheld whip Built for hard work
- Ham radio antennas collection
- Communications collection — antennas, adapters & relocation gear
- Handheld Radio Adapter Guide — SMA↔BNC fit for HT radios
Guides
- Replace your stock HT antenna (rubber duck upgrade)
- Flexible handheld radio antenna whip
- How to choose a ham radio HT antenna
- Buy vs DIY NiTi HT antenna
FAQ
What mount or connector does Maximus Mobile use?
NMO for mobile / vehicle installation. Mag mount sold separately.
What bands does it cover?
Dual-band 2m / 70cm (VHF/UHF). Not HF.
Is this an HT antenna?
No — this is the mobile NMO option. For handheld BNC, see Maximus, Guardian, or Minimus.
Is it nitinol / “unbreakable”?
Heavy-duty 3mm NiTi/nitinol. “Unbreakable” = spring-back and trail resilience language only — not mil-spec or literal indestructibility.
Why Maximus Mobile for offroad / overland?
Same Idaho-built Iron Spear matrix as the HT whips, on an NMO mount for vehicle ground-plane installs. Compare mount and fit for your vehicle; no invented gain or range claims.
Specs
Quick Specs:
- Bands: 2m (144-148 MHz) & 70cm (420-450 MHz)
- Material: 3mm Heavy-Duty Nickel Titanium (NiTi)
- Length: 19.5" (Optimized for vehicle roof ground planes)
- Connector: Custom slip-fit NMO (Non-base loaded)
- SWR: 1.41:1 (2m), 1.34:1 (70cm) verified on test vehicle roof (Real World Testing, with our Magmounts)
- Gain: 2.15 dBi (2m) / ~5.0 dBi (70cm) (Real World Testing, with our Magmounts)
- Power: 75W Max
- Armor Colors: Olive Drab, Neon Blue, Red, Snake, Brown, Neon Orange, Dual Color Expedition
A Note From Our Workshop:
Each Maximus NMO is handcrafted in our shop. We're always improving, so your antenna might have slight variations or component updates from photos as we use the best available parts. The core Maximus quality and NiTi spring-back resilience is always guaranteed.
*Performance Disclaimer: All SWR and gain (dBi) specifications are established through real-world testing using our calibrated equipment and Iron Spear magnetic mounts placed dead-center on a metal vehicle roof. Actual numbers can and will vary depending on your specific vehicle, grounding conditions, mounting location, and if a different style of mount is used. If you are not mounting this antenna in the center of a metal roof, you must ensure proper grounding and an adequate ground plane are established for optimal performance and equipment safety.
Design Philosophy
Engineered for the Extremes
Every feature of the Maximus NMO is designed with the realities of the field in mind:
- Precision Tuned: Cut/Ground/machined to an exact length, this antenna factors in the capacitive coupling of the heavy armor and the specific physics of a vehicle roof ground plane to deliver an optimized 1/4 wave (VHF) and 3/4 wave (UHF) harmonic resonance.
- No-Snag Armor: Fully encased in our heavy-duty armor to protect the element, prevent weather corrosion, and blend into your rig.
- Lifetime Warranty: Built to outlast your truck, guaranteed for life against manufacturing defects.
Additional Information
Why the Maximus Mobile is Your Best Choice:
- Overland Ready: Double the thickness of our standard Maximus. The 3mm NiTi wire refuses to snap, or maintain a bend, under harsh trail abuse.
- Custom NMO Base: No weak base-loading coils to break. Our custom-machined NMO base provides a rock-solid mechanical connection.
- Enhanced Bandwidth: The thicker 3mm element lowers the "Q" factor, providing a massive, forgiving SWR bandwidth across both VHF and UHF frequencies.
- Handmade Quality: Meticulously built in-house for peak performance, not mass-produced in a massive factory.