The Genie 77790GT is a genuine OEM Right-Hand Tire & Wheel Assembly, 355/55D625 FF, designed for Genie S-series telescopic boom lifts and Z-series articulating boom lifts. As a factory-sourced component, this assembly delivers the exact size, load rating, and fitment profile required by the machines it serves — no guesswork, no adaptation. It is confirmed to fit a wide range of models including the S-60, S-60 XC, S-60 TRAX, S-65, S-65 XC, S-65 TRAX, S-80 J, Z-60/34, Z-62/40, Z-60/37 DC, and related variants. When a drive tire wears out or sustains damage on a boom lift, replacing it with the correct OEM assembly keeps the machine rolling true and the chassis geometry exactly as Genie engineered it.
Key Features
- Genuine OEM Construction — Sourced directly from Genie, this assembly meets the exact compound hardness, ply rating, and bead-seat specification required for boom lift service — not adapted from a generic tire catalog.
- Right-Hand Side Specific — Engineered as a dedicated RH assembly, this component mounts directly to the right-hand drive position without modification, preserving correct wheel offset and drive engagement.
- Flat-Free (FF) Foam-Filled — The FF designation means this tire is foam-filled, eliminating blowout risk on rough terrain and jobsite surfaces where a pneumatic failure would take a boom lift out of service immediately.
- Broad S and Z Boom Compatibility — Fits a wide span of Genie telescopic and articulating boom lift models, including S-60, S-65, S-80 J, Z-60/34, Z-62/40, Z-60/37 DC, Z-60 FE Hybrid, and more — confirm your model against part number 77790GT before ordering.
- Traction and Stability Integrity — A worn or mismatched drive tire on a boom lift compromises traction, machine leveling, and load stability at height. Replacing with the correct assembly restores the handling characteristics the machine was designed to deliver.
- Operational Safety at Height — On self-propelled boom lifts, tire condition directly affects platform stability and travel control. Using the correct OEM tire and wheel assembly ensures the machine's drive and braking systems perform as designed.
The tire and wheel assembly on a boom lift carries the machine's weight across the ground, transmits drive force from the wheel motors, and anchors the chassis during platform extension. On rough or uneven terrain — common on construction sites — a degraded tire can cause uneven tracking, trigger tilt-sensor faults, or reduce the machine's ability to maintain stable footing with a worker at height. The foam-filled (FF) construction of this assembly eliminates the cavity that a pneumatic tire relies on, so there is no air pressure to lose and no blowout scenario. When this assembly wears or is damaged, replacing it promptly with the correct Genie part maintains the drive balance and ground-contact performance the machine depends on for safe, controlled operation.
Part Details
| Part Number | 77790GT |
|---|---|
| Brand | Genie |
| Part Type | Genuine OEM |
| Description | Tire & Wheel Assembly, RH, 355/55D625, FF |
Compatibility & Fitment
| Name | Model |
|---|---|
| S-60 | S-60 |
| S-65 | S-65 |
| S-60X | S-60X |
| S-60 XC | S-60 XC |
| S-60 HC | S-60 HC |
| S-60 TRAX | S-60 TRAX |
| S-65 TRAX | S-65 TRAX |
| S-65 XC | S-65 XC |
| S-60 HF | S-60 HF |
| S-65 HF | S-65 HF |
| S-80 J | S-80 J |
| S-60 FE Hybrid | S-60 FE Hybrid |
| S-60 DC | S-60 DC |
| Z-60/34 | Z-60/34 |
| Z-62/40 | Z-62/40 |
| Z-60/37 DC | Z-60/37 DC |
| Z-60/37 FE Hybrid | Z-60/37 FE Hybrid |
| Z-60 DC | Z-60 DC |
| Z-60 FE Hybrid | Z-60 FE Hybrid |
| Z-60 FE | Z-60 FE |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
