Cooper Discoverer S/T Maxx Mixed-Service Drive Tire
The Cooper Discoverer S/T Maxx is a radial, open-shoulder tire designed for vocational and mixed-service work where pavement, gravel, and jobsite surfaces are all part of the route. Its tread layout focuses on forward traction and controlled clean-out in loose material while maintaining predictable manners on-road. This page focuses on drive-axle selection for commercial use, including practical guidance on sizing, fitment checks, and what to consider when matching the tire to your daily terrain and load demands.
Key Features and Tread Design
The Cooper Discoverer S/T Maxx is built around an open-shoulder tread design intended to help the tire maintain traction when surfaces change from hardpack to gravel, dirt, or construction debris. The voids at the shoulder area support self-cleaning behavior in loose material, and the block pattern is oriented to promote consistent drive traction under throttle. For mixed-service users, the goal is a tread that can bite off-road without feeling unpredictable on pavement. Like most open-shoulder designs, it trades some refinement for traction and clean-out, making it a practical option for work routes that frequently leave the asphalt.
Intended Application: Mixed-Service and Vocational Use
Mixed-service tires are chosen for routes that combine paved miles with unpaved access roads, job sites, and variable weather. The Cooper Discoverer S/T Maxx fits that need when you want an all-terrain style tread with an open shoulder for forward traction and surface clearing. It is typically selected for drive-axle use on work vehicles that encounter gravel, dirt, and uneven terrain but still need dependable road behavior for daily driving. If your operation regularly transitions between highway speeds and low-speed work zones, this tire category can reduce the need to switch between a road tire and a more aggressive off-road option.
Sizes and Fitment (16–20 Inch Options)
The Cooper Discoverer S/T Maxx is offered in a wide range of 16 to 20 inch fitments, including flotation sizing. Confirm the exact size on your door placard and verify wheel diameter, section width clearance, and overall diameter before changing sizes.
Approved sizes for this model include: 225/75R16, 235/80R17, 235/85R16, 245/70R17, 245/75R16, 245/75R17, 255/80R17, 255/85R16, 265/60R18, 265/65R17, 265/65R18, 265/70R16, 265/70R17, 265/70R18, 265/75R16, 275/65R18, 275/65R20, 275/70R17, 275/70R18, 285/60R20, 285/65R18, 285/70R17, 285/75R16, 285/75R17, 295/70R17, 295/70R18, 305/70R18, 315/70R17, 315/75R16, 35x12.50R20.
Construction, Durability Focus, and What to Check
As a radial tire intended for work-oriented mixed-service use, the Cooper Discoverer S/T Maxx is generally selected for its balance of road stability and off-road resilience. In this category, durability depends as much on correct application as it does on tread design. When evaluating fitment, confirm the tire’s service description and load capacity match your vehicle’s requirements, and ensure your wheel width is appropriate for the chosen size. For jobsite conditions, sidewall and tread area protection are practical considerations, but avoiding impacts and maintaining correct inflation are what most often prevent casing damage and irregular wear over time.
Review-Style Buying Notes and Comparisons
In day-to-day mixed-service use, the Cooper Discoverer S/T Maxx is often considered by drivers who want a more traction-focused tread than a milder all-terrain pattern, without moving all the way to an extreme mud-focused design. Compared with less aggressive all-terrain options, an open-shoulder layout typically provides better clean-out and drive bite on loose surfaces, with a tradeoff of more noticeable tread presence on pavement. Compared with a dedicated mud-terrain style tire, a mixed-service all-terrain pattern like this is commonly chosen when you still spend significant time on-road and want steadier manners for commuting between sites.
Recommendations and practical tips
The Cooper Discoverer S/T Maxx is typically recommended for commercial users who need a radial, open-shoulder all-terrain tire for mixed-service routes. It suits drivers who regularly transition between pavement and unpaved surfaces such as gravel roads, dirt access trails, and active work areas, and who want traction-focused tread behavior for drive-axle use. It is best for practical operators prioritizing reliable forward grip and tread clean-out over the quietest on-road feel.
When we recommend it:
- You run mixed-service routes with frequent gravel, dirt, or jobsite surfaces
- You want an open-shoulder tread for drive-axle traction and surface clearing
- Your current tire struggles with loose material or uneven access roads
- You need a single tire solution for both on-road travel and off-pavement work
When to consider other options:
- Your routes are primarily highway and you prioritize the smoothest, quietest on-road ride
- You rarely leave pavement and do not need open-shoulder clean-out behavior
- You require an axle-specific tire design not aligned with drive-axle selection
Expert tips:
- Match the exact size and wheel diameter first, then confirm overall diameter clearance at full steering lock and suspension travel
- If upsizing, verify gearing and speedometer implications with your vehicle upfitter or service provider
- Choose a size that maintains adequate load capacity for your real working weight, not just empty vehicle weight
- For mixed-service fleets, standardize sizes across units where possible to simplify rotations and spares
Usage and care tips:
- Check inflation regularly, especially when temperatures swing or loads change day to day
- Rotate on a consistent schedule to help control irregular wear common in mixed-service use
- Inspect for cuts, chips, and embedded debris after jobsite days, and address issues early
- Avoid spinning on sharp rock or broken surfaces when possible to reduce tread damage
Get the right fit with expert support
The Cooper Discoverer S/T Maxx is a practical choice when your work routes include both pavement and unpaved surfaces and you want an open-shoulder, traction-oriented tread for mixed-service drive use. It is especially relevant for vocational driving where loose material, gravel access roads, and jobsite conditions are part of normal operation. If you are trying to balance predictable on-road manners with the need for controlled clean-out off pavement, this model is worth a close look.
Best fit scenarios:
- Mixed-service routes that regularly shift between highway miles and gravel, dirt, or jobsite surfaces
- Drivers who want open-shoulder tread behavior for forward traction and clean-out in loose material
- Work vehicles that need one tire approach instead of switching between road and more aggressive off-road options
- Buyers choosing from common 16 to 20 inch fitments, including flotation sizing like 35x12.50R20
When to pause and check fitment:
- You are changing sizes from what is listed on the door placard, especially when upsizing overall diameter
- You are moving to a wider or taller option and need to verify clearance at full steering lock and suspension travel
- You need to confirm load capacity and service description match your vehicle requirements and intended axle position
- You are considering a flotation size and need to confirm wheel width compatibility and brake, fender, and suspension clearance
Why customers trust NeoTires:
- Tire experts available via chat, phone, or text to confirm size and drive-axle selection
- Practical guidance to compare approved sizes and avoid common fitment mistakes
- Support for commercial buyers, including multi-tire and fleet orders
- Proactive delivery coordination across warehouses and shipping teams to keep orders moving
Confirm your size and axle position
Send us your current tire size and how the vehicle is used, and we will help you confirm fitment and whether this is the right drive-axle choice for your route.
Actions:
Get help comparing fitment options
If you are deciding between common sizes, we can walk through clearance checks and practical tradeoffs before you commit.
Actions:
Request a commercial quote
For fleets or multi-tire orders, we will help coordinate quantities, approved sizes, and delivery timing for your operation.
Actions:
