2016 Kenworth T680 Tire Size & Pressure
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Quick Answer
- OEM Tire Size: 11R22.5 (Drive/Steer), 295/75R22.5 (Drive/Steer), 285/75R24.5 (Drive/Steer)
- Recommended Cold Tire Pressure (Door Placard): Varies significantly by load and configuration. Always refer to the specific vehicle's door placard. Typically ranges from 100-120 psi for drive and steer axles.
- Bolt Pattern: 10-hole, 285.75mm (11.25 inches) bolt circle diameter
- Wheel Size: 22.5 x 8.25 inches, 22.5 x 9.00 inches, 24.5 x 8.25 inches
- Load Index/Speed Rating: Will vary based on specific tire and application (e.g., steer vs. drive). Common load indexes are G (14 ply equivalent) or H (16 ply equivalent). Speed ratings are typically J (62 mph) or K (68 mph) for commercial tires.
- Spare Tire Size: Typically the same as the installed road tires, though not always carried.
- TPMS Frequency: 315 MHz or 433 MHz, depending on the specific TPMS system and manufacturing region. Consult your vehicle's manual or a diagnostic tool.
Tire Sizes by Trim
The Kenworth T680 is a highly configurable Class 8 truck. Rather than "trims" like passenger vehicles, tire sizes are specified based on intended application, axle configuration, and customer preference. Common OEM tire sizes include:
| Axle Position | Tire Size | Notes |
|---|---|---|
| Steer | 11R22.5 | Common all-position, regional haul |
| Steer | 295/75R22.5 | Common all-position, regional haul |
| Steer | 285/75R24.5 | Common all-position, long haul |
| Drive | 11R22.5 | Common drive axle, regional haul |
| Drive | 295/75R22.5 | Common drive axle, regional haul |
| Drive | 285/75R24.5 | Common drive axle, long haul |
Note: Other sizes and super single configurations may be available depending on the original build and aftermarket modifications.
Recommended Replacement Tires
Choosing replacement tires for a 2016 Kenworth T680 depends heavily on the application (long haul, regional, vocational), desired fuel efficiency, tread life, and budget. Here are a few popular options across different price tiers:
- Premium Option (Excellent Fuel Economy & Tread Life):
- Michelin X Line Energy Z (Steer) / D (Drive): Known for exceptional fuel efficiency and long tread life. Often seen as a benchmark for over-the-road applications.
- Price Tier: $$$$
- Michelin X Line Energy Z (Steer) / D (Drive): Known for exceptional fuel efficiency and long tread life. Often seen as a benchmark for over-the-road applications.
- Mid-Range Option (Good Balance of Performance & Cost):
- Bridgestone M760 Ecopia (Steer) / M770 Ecopia (Drive): Designed for fuel efficiency and dependable performance in regional and long-haul operations.
- Price Tier: $$$
- Bridgestone M760 Ecopia (Steer) / M770 Ecopia (Drive): Designed for fuel efficiency and dependable performance in regional and long-haul operations.
- Value Option (Reliable Performance on a Budget):
- Goodyear G399 LHS Fuel Max (Steer) / G305 LHD Fuel Max (Drive): Offers good overall performance and fuel efficiency for cost-conscious operators.
- Price Tier: $$
- Goodyear G399 LHS Fuel Max (Steer) / G305 LHD Fuel Max (Drive): Offers good overall performance and fuel efficiency for cost-conscious operators.
Always ensure replacement tires match or exceed the original equipment
More specs for the 2016 Kenworth T680
Oil Capacity & Filter
Capacity, weight, filter PN, drain plug torque, change interval.
Fluid Type Specs
Engine oil, coolant, ATF, diff, brake, PS, DEF — with OEM spec numbers.
Coolant Capacity & Type
Total system capacity, OEM coolant spec, flush interval, bleed tips.
Transmission Fluid & Service
Trans model, fluid spec, capacity, filter PN, service interval.
Torque Specifications
Lug nuts, drain plug, caliper, axle nut, plug, key fasteners.
Brake Pad & Rotor Specs
Pad PNs, rotor size, min thickness, caliper torque.
Battery Size & Group
Group size, CCA, AGM/flooded, dimensions, reset note.
A/C Refrigerant & Oil
R-134a or R-1234yf, charge oz, PAG oil spec.
Bulb Sizes (Headlight, Tail, Fog)
Headlight, fog, tail, turn, reverse, interior.
Factory Maintenance Schedule
Service intervals by mileage, severe-duty notes, known issues.
Towing Capacity & Payload
Max tow, payload, GVWR/GCWR, hitch class by trim.
Fuse Box Diagram & Amperage
Fuse box locations, layout, amps, and what each fuse controls.
Serpentine Belt Routing & Length
Belt routing, length, rib count, OEM + aftermarket PNs.
Wheel Alignment Specifications
Camber, caster, toe ranges (front & rear), adjustability notes.
Paint Color Codes
All factory colors with paint codes, sticker location, touch-up tips.
Wiper Blade Sizes
Driver/passenger/rear blade size, attachment, OEM + cross-refs.
Spark Plug Type & Gap
Plug PN, gap, torque, interval by engine.
Transmission & Axle Gear Ratios
Trans gear ratios, axle ratios, RPO codes, tow vs MPG impact.
Key Fob Programming
DIY programming steps, FCC ID, fob PN, battery, transponder.
Same spec — other model years
Maintenance & repair guides
2016 Kenworth T680 Maintenance Schedule →
Available maintenance guidance; confirm the manufacturer schedule.
Repair planning references →
Plan the scope of work; detailed procedures need configuration-matched evidence.
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