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Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005

Tundra owner who wants more tread than a highway A/T?

Rugged Trek is the middle-ground rugged option.

Cooper's Discoverer Rugged Trek in 265/65R18 116T is the more rugged pick on this Tundra table, checked against a comfort-first Bridgestone Dueler A/T Ascent and a Firestone Destination A/T2. It carries a taller, higher-load 116T rating and rugged-terrain styling, so it splits the difference between a smooth A/T and a knobby off-road tire. It leads when you want extra tread and load without going full mud-terrain.

Nicole, Fitment Pilot editor

Reviewed by Nicole

Fitment

Toyota Tundra current full-size trucks when 265/65R18 116T specs stay inside the checked route limits

Verify first

Use these full-size tire rows when the Tundra tire diameter, load rating, rim width, and service description match the route limits and the wheel offset stays inside the checked positive-offset window.

Part number
171066005
Choose it when
Choose it when 265/65R18 116T fits your Tundra and you want a rugged-leaning all-terrain with a higher load rating than a comfort tire.
Pass when
Pass when you would rather have the quieter highway tire, when the size or load range does not match, or on lifted or aggressive-offset builds outside the checked route.
Our cross-product compare

Same category. Different reason to buy.

Evidence level B
Best for
Tundra owners who want rugged tread and load without a mud-terrain.
Bridgestone Dueler A/T Ascent 265/60R18 110T MPN 009706 is an exact SimpleTire row promoted into the truck tire catalog for 2024 Toyota Tundra SR5 CrewMax 4x4 planning with official tire-family docs and a current sell...
Firestone Destination A/T2 245/75R17 112S MPN 013915 is an exact SimpleTire row promoted into the truck tire catalog for 2024 Toyota Tundra SR5 CrewMax 4x4 planning with official tire-family docs and a current seller...
What's included
265/65R18 116T, Discoverer Rugged Trek family, set of four; higher load rating than the comfort peers.
Tire size: 265/60R18 110T
Tire size: 245/75R17 112S
Product approach
The 2024 Toyota Tundra SR5 CrewMax 4x4 route keeps offset, diameter, load, and rim-width checks visible before the offer is treated as a match.
Documented fitment only -- no standout approach beyond exact application is recorded for the Dueler A/T Ascent 265/60R18 110T MPN 009706.
Documented fitment only -- no standout approach beyond exact application is recorded for the Destination A/T2 245/75R17 112S MPN 013915.
Install burden
Mount, balance, and TPMS relearn; expect a bit more road noise than a highway A/T. Confirm the exact MPN.
Confirm the Dueler A/T Ascent 265/60R18 110T MPN 009706 installation procedure and hardware before ordering.
Confirm the Destination A/T2 245/75R17 112S MPN 013915 installation procedure and hardware before ordering.
Fitment
Confirm load range, service description, rim width, and diameter against the Tundra route.
Confirm the exact Bridgestone Dueler A/T Ascent 265/60R18 110T MPN 009706 application for Toyota Tundra current full-size trucks before ordering.
Confirm the exact Firestone Destination A/T2 245/75R17 112S MPN 013915 application for Toyota Tundra current full-size trucks before ordering.
Choose it when
You want more tread and load than a comfort A/T, short of an off-road tire.
Pick the Dueler A/T Ascent 265/60R18 110T MPN 009706 over the Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 and the Firestone Destination A/T2 245/75R17 112S MPN 013915 when you want a balanced on- and off-road all-terrain tire.
Choose the Destination A/T2 245/75R17 112S MPN 013915 when it is the exact match for your truck and the Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 and the Bridgestone Dueler A/T Ascent 265/60R18 110T MPN 009706 do not list your application.
Current decision file

Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005

Part ST-171066005

Best for
Tundra owners who want rugged tread and load without a mud-terrain.
What's included
265/65R18 116T, Discoverer Rugged Trek family, set of four; higher load rating than the comfort peers.
Product approach
The 2024 Toyota Tundra SR5 CrewMax 4x4 route keeps offset, diameter, load, and rim-width checks visible before the offer is treated as a match.
Install burden
Mount, balance, and TPMS relearn; expect a bit more road noise than a highway A/T. Confirm the exact MPN.
Fitment
Confirm load range, service description, rim width, and diameter against the Tundra route.
Choose it when
You want more tread and load than a comfort A/T, short of an off-road tire.
How we compared

Built from the exact SKU paperwork, the application limits, what comes in the box, the install burden, and where each part can be bought right now. Price is read last, not first.

Wheel & tire owned fitment checklist visual
Visual unavailable
Illustration
Where to buy it

Price references

No paid offer is live here. Treat any price shown as a reference only, and use the other retailer searches below to check current availability.

No current price reference

Use the retailer searches below and confirm the exact manufacturer part number before ordering.

Other retailers to check

These other-retailer searches use the brand and part number shown on this page. We earn nothing if you buy through them.

Other retailer

SimpleTire

An online tire seller sorted by brand and size, useful for lining up the exact size, load range, and quantity.

Browse by tire brand, then confirm the exact size, load range, quantity, and service description.

Browse tire brands
Other retailer

Summit Racing

House fitment data and manufacturer spec sheets ride along on their pages, which makes it a good spot to sanity-check the part number.

Search with the brand and part number shown on this page, then confirm the manufacturer part number before ordering.

Search Summit Racing
Other retailer

Walmart

A broad marketplace where third-party sellers vary widely, so check who is actually selling and how returns work.

Search with the brand and part number shown on this page, then verify the exact seller, item condition, fitment, and return terms.

Search Walmart

Price checks build up as sellers are rechecked over time. The seller's checkout page has the final say; make sure stock, exact SKU, and seller details all agree before you order.

Report an issue
Decision trail Check these before you buy.
Part Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 Part ST-171066005. Cooper resource available.
Fits 2022-current Toyota Tundra current full-size trucks Use these full-size tire rows when the Tundra tire diameter, load rating, rim width, and service description match the route limits and the wheel offset stays inside the checked positive-offset window.
Watch for Wheel & Tire Clearance checkout checks Confirm load rating, wheel offset, tire diameter, rubbing risk, TPMS needs, and spare-tire planning before checkout.
Other retailer · Seller 3 other retailer searches Search with the brand and part number shown here, then confirm the exact part and fitment with the retailer.
Photos Category visual The photo shows the category, not this exact part; an exact product photo appears once image rights are confirmed.
If unsure Compare, read, or report If the seller page, vehicle details, or photos do not line up, compare sellers, read the guide, or report the issue.
The evidence

Fitment and install resources

Reviewed 2026-09-21

Editorial method

What we checked on this page

We check the Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 for exact part identity, seller options, stock and price dates, photo rights, and official resources. FitmentPilot combines automated vehicle database indexing with human automotive editorial review. Rather than presenting generic affiliate catalogs, our system evaluates the exact mechanical constraints of each chassis platform — from bolt circle geometry and motion ratios to factory package exclusions — giving truck owners complete confidence before checkout.

Sellers3 seller destinations

Paid offers and other retailer searches are labeled separately so you can choose where to check.

FreshnessConfirm stock at the retailer

Check current stock and price with the retailer before ordering.

PhotosCategory visual only

This photo shows the part category, not this exact product. Confirm SKU, size, and kit contents before ordering.

Resources2 official resources

Install, fitment, spec, or warranty resources are available before checkout.

An exact product photo appears here once image rights are confirmed.

Choose it, pass, or verify

Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 is an exact SimpleTire row promoted into the truck tire catalog for 2024 Toyota Tundra SR5 CrewMax 4x4 planning with official tire-family docs and a current seller price snapshot.

Choose it if

  • Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 is tracked as an exact MPN row, so shoppers can compare one tire size instead of a broad family label.
  • The 2024 Toyota Tundra SR5 CrewMax 4x4 route keeps offset, diameter, load, and rim-width checks visible before the offer is treated as a match.
  • Seller price, rating context, warranty resources, exact tire specs, and fitment checks are present, but final stock and shipping terms still belong in checkout.
  • Use these full-size tire rows when the Tundra tire diameter, load rating, rim width, and service description match the route limits and the wheel offset stays inside the checked positive-offset window.

Pass if

  • The Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 is not the right choice when your truck falls outside 2022-current Toyota Tundra current full-size trucks, or its trim, engine, and package cannot be matched to the documented application.
  • Pass when this exclusion applies: TRD Pro, dealer-lift, hybrid, or aggressive-offset setups without their own route check
  • Choose another size or construction when load capacity, wheel width, offset, rubbing clearance, ride, or spare-tire needs point elsewhere.

Verify

  • Exact tire MPN, tire size, and four-tire price
  • Load range, service description, rim width, and tire diameter
  • Wheel offset, brake clearance, seller stock, shipping, returns, and installer requirements
  • The checked shelf is a 2024 Tundra SR5 CrewMax 4x4 route; TRD Pro, hybrid, dealer-lift, and aftermarket suspension packages need their own clearance and seller checks before inheriting this answer.
Workshop & DIY Guidelines

Cooper Discoverer Rugged Trek 265/65R18 116T MPN 171066005 Installation & Fitment Protocol

Wheel fitment is governed by three interrelated geometric factors: bolt circle diameter, wheel offset (ET in millimeters), and backspacing (inches from the back lip to the mounting surface). Lower or negative offset wheels push the tire outward for an aggressive stance, which increases the scrub radius and swings the outer shoulder into bumper valances and cab mounts during steering.

Install Difficulty

Shop & Bench Specs

Difficulty: Beginner (1/5)

Estimated Install Time: 1.0 – 1.5 hours (Wheel Mounting & TPMS Pairing)

Required Tools

Installation Equipment

  • Floor jack & jack stands
  • 1/2" Drive calibrated torque wrench
  • Thin-wall protective lug nut socket set (prevent wheel finish damage)
  • Tire pressure gauge
Post-Install Safety

Post-Install Protocol

  • Torque lug nuts in a criss-cross star pattern to manufacturer spec in two stages (first 50%, then 100%).
  • Perform mandatory re-torque check after 50 to 100 driving miles.
  • Verify full steering lock-to-lock clearance at ride height and during full suspension compression.

Wear Triggers & Maintenance Checks

  • Wheel bearing stress and premature hub assembly wear when running extreme negative offset (-12mm to -44mm).
  • Cupping or feathering wear on oversized tires when run at incorrect cold inflation pressures.
  • Caliper bracket scoring if wheel inner barrel clearance is under 3mm.

Chassis Fitment Context

3rd Gen Tundra (2022+) features an IFS motion ratio of ~1:1.75. Due to redesigned cast aluminum front steering knuckles, clearance between tire sidewalls and the upper ball joint neck is tighter than on prior generations, necessitating wheel offsets between +18mm and +25mm for 35x12.50 tires.

The 2nd Gen XK50 (2007-2021) was famed for its 5.7L naturally aspirated V8, 5x150 bolt pattern, and rear leaf springs. In 2022, the 3rd Gen transitioned to the TNGA-F platform with the 3.4L Twin-Turbo V6 / Hybrid, multi-link rear coil suspension, and switched to the universal 6x139.7 mm bolt circle.

Pre-Installation Unboxing Verification Checklist

Step 01: Confirm Physical SKU & Labeling

Inspect outer box label against your order invoice and the manufacturer part number shown here before opening hardware bags.

Step 02: Dry-Fit & Hardware Inventory

Unpack fasteners, brackets, and instructions. Perform a preliminary dry-fit check against the vehicle before removing factory components.

Step 03: Review Torque & Thread Requirements

Identify critical torque values and whether thread locker (Blue Loctite) or anti-seize compound is required by the manufacturer.

Step 04: Plan Post-Install Calibration

For suspension, steering, or lighting parts, schedule a professional alignment and verify forward-facing ADAS sensor calibration.