DunlopGrandtrek PT21
Dunlop Grandtrek PT21 Efficient and versatile? Sounds like the Dunlop Grandtrek PT21! Dunlop Grandtrek PT21 Features The Dunlop Grandtrek PT21 is an all-season original equipment tire designed specifically for the needs of your SUV or crossover, like the Nissan Rogue. Engineered to handle a multitude of driving challenges, including dry, wet and light winter weather, the Grandtrek PT21 from Dunlop effectively helps you traverse roads for most of the year. Its long lived tread is well suited for both inclement and fair weather. Plus, it's a great help at the gas tank too. Features of the Dunlop Grandtrek PT21 include: An easy to maintain symmetrical tread pattern that provides consistent and even treadwear and performance. Low rolling resistant tread design boosts fuel efficiency. A computer optimized tread pattern fends road noise and vibrations to improve ride comfort. Four circumferential groovesand open shoulders help channel water away from the tire's contact patch, giving you readily available wet condition handling and traction. Dunlop Grandtrek PT21 Treadwear & Warranty Like many original equipment tires, the Dunlop Grandtrek PT21 does not include a mileage warranty. Dunlop covers this tire with a workmanship and materials warranty for six years with a free replacement in the first year or 2/32 inches of wear (and then prorated until 2/32 inches remaining depth). But you can add a Certificate to your order for additional peace of mind! In the event of a road hazard
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NHTSA-reported issues for dunlop grandtrek PT21
Top issue category: Tread / Belt
Most reported: Tread / Belt (4) · Tires (General) (2)
What owners described
Sidewall failure is the most common description, in 18% of these reports. Percentages are shares of the 711 reports filed against Dunlop tires across every line and vehicle that include a written account; a single report can describe more than one problem, so they do not total 100%.
| Reported problem | This subject | All tire complaints | Relative |
|---|---|---|---|
| Sidewall failure | 18% | 15% | 1.2× |
| Blowout or sudden deflation | 18% | 20% | 0.9× |
| Loss of control, rollover or collision | 11% | 8% | 1.3× |
| Tread or belt separation | 10% | 13% | 0.7× |
| Bubble or bulge in the tire | 9% | 6% | 1.5× |
| Cracking or dry rot | 8% | 9% | 0.9× |
Mileage at failure
478 of these reports state an odometer reading. The middle report is at 14,950 miles, with 8 in 10 falling between 3,636 and 48,000 miles.
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about Dunlop. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
DUNLOP SP SPORT SIGNATURE SIDEWALL SEPARATION. RISK OF SERIOUS PERSONAL INJURY AND/OR VEHICLE DAMAGE COULD RESULT. THIS APPEARS TO BE A COMMON OCCURRENCE FOR THIS MODEL OF TIRE ON WEB SITES SUCH AS: HTTP://WWW.VEHICLETIRE.COM/COMPLAINT/DUNLOP/SP+SPORT+SIGNATURE.
EXACT MODEL OF TIRE IS NOT FOUND IN THE DROP DOWN MENU. DUNLOP SP SPORT 01 A/S. SIZE 225/40R18 92H. A BUBBLE IN THE SIDEWALL DEVELOPED AFTER 9,000 MILES WITH NO ACCIDENT. THIS WEAKNESS IN THE TIRE CAN VERY EASILY LEAD TO BLOWOUTS. IF THE BUBBLE OCCUR ON THE INSIDE OF THE TIRE, IT CAN GO UNNOTICED. THIS IS A COMMON PROBLEM WITH THIS SPECIFIC TIRE AND MANY VEHICLES USE THIS TIRE AS THE ORIGINAL EQUIPMENT.
THE CONTACT OWNS A 2007 PONTIAC TORRENT EQUIPPED WITH DUNLAP SIGNATURE 2 TIRES, SIZE 235-65R16 AND DOT NUMBER TJ46JU1R3512. THE CONTACT STATED THAT THE FOUR TIRES FAILED PREMATURELY. THE TIRE TREAD SEPARATED AND CAUSED THE TIRES TO BECOME FLAT. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE TIRES WERE REPLACED. THE TIRE FAILURE MILEAGE WAS 164,039. THE VEHICLE FAILURE MILEAGE WAS UNKNOWN.
FRONT TIRE ON MY 2012 HARLEY DAVIDSON FLHX STREET GLIDE HAS CRACKED SIDEWALLS.TIRE IS THE ORIGINAL TIRE WITH 1500 MILES WEAR.REAR TIRE DOES NOT HAVE THIS CRACKING.HARLEY DAVIDSON DEALER ([XXX])STATES ITS AN ENVIRONMENTAL ISSUE THAT CAUSED TIRE DAMAGE. BIKE IS KEPT IN A HEATED GARAGE,ON WOODEN BOARDS AND IS NEVER RIDDEN IN OR SEEN RAIN.SEARCH OF ONLINE FORUMS SHOWS THAT THERE ARE OTHER PEOPLE WITH THIS SAME ISSUE,ALTHOUGH I CAN NOT VOUCH FOR THE WAY THEIR BIKES ARE KEPT AND MAINTAINED.S.C. 552(B)(6).
Complaints are voluntarily submitted to the NHTSA Office of Defects Investigation and are not verified by NHTSA; they represent owner-reported problems, not proven defects. Counts can be useful as a relative quality signal across comparable tires or vehicles.
Specs
| Brand | Dunlop |
|---|---|
| Model | Grandtrek PT21 |
| Season | all-season |
| Type | truck-suv |
| UTQG treadwear | N/A |
| UTQG traction | N/A |
| UTQG temperature | N/A |
| Mileage warranty | N/A |
| Noise (dB) | N/A |
| Introduced | N/A |
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Available sizes (0)
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Dunlop grandtrek PT21: what the numbers tell you
Manufacturer treadwear data for the Grandtrek PT21 is not publicly listed. This is common for OEM-only or track-day tires that don't carry a US treadwear warranty. No mileage warranty is published for this tire, which is typical for performance summer and track-day rubber where the manufacturer doesn't make wear-life claims.
Cabin noise data for this tire is not published by the manufacturer. As a all-season tire built for the truck-suv segment, the Grandtrek PT21 is positioned against direct rivals within the same category. Comparing it to a tire in a different category (e.g. summer vs all-season) makes the spec sheet misleading because the design targets are not the same.
Dunlop Grandtrek PT21 Efficient and versatile? Sounds like the Dunlop Grandtrek PT21! Dunlop Grandtrek PT21 Features The Dunlop Grandtrek PT21 is an all-season original equipment tire designed specifically for the needs of your SUV or crossover, like the Nissan Rogue. Engineered to handle a multitude of driving challenges, including dry, wet and light winter weather, the Grandtrek PT21 from Dunlop effectively helps you traverse roads for most of the year. Its long lived tread is well suited for both inclement and fair weather. Plus, it's a great help at the gas tank too. Features of the Dunlop Grandtrek PT21 include: An easy to maintain symmetrical tread pattern that provides consistent and even treadwear and performance. Low rolling resistant tread design boosts fuel efficiency. A computer optimized tread pattern fends road noise and vibrations to improve ride comfort. Four circumferential groovesand open shoulders help channel water away from the tire's contact patch, giving you readily available wet condition handling and traction. Dunlop Grandtrek PT21 Treadwear & Warranty Like many original equipment tires, the Dunlop Grandtrek PT21 does not include a mileage warranty. Dunlop covers this tire with a workmanship and materials warranty for six years with a free replacement in the first year or 2/32 inches of wear (and then prorated until 2/32 inches remaining depth). But you can add a Certificate to your order for additional peace of mind! In the event of a road hazard
For an apples-to-apples comparison against direct rivals, see the comparison pages linked from this tire's brand index.
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Last verified 2026-10-07.