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Dunlop Grandtrek AT5 vs Dunlop Grandtrek AT20

Dunlop Grandtrek AT5 vs AT20 - Which Is #1? H2H Test Data

Here are the key stats for the Dunlop Grandtrek AT5 and Dunlop Grandtrek AT20 tyres, at a glance.
Grandtrek AT5Grandtrek AT20
Vehicle SuitabilityLight Truck / SUVLight Truck / SUV
Driving StyleOn-/Off-Road All-TerrainHighway All-Season
SeasonAll SeasonAll Season
Release Date20192006
Run Flat?NoNo
Overall ScoreN/A67/100

Pricing

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Dunlop Grandtrek AT5 vs Dunlop Grandtrek AT20 in Australia

The Grandtrek AT5 has been around in Australia for about 5 years, whereas the Grandtrek AT20 has been on the market for about 18 years

The Grandtrek AT5 is rated for on-/off-road all-terrain action, however the Grandtrek AT20 tyres are classified as highway all-season. Both tyres are designed for use with 4WDs, SUVs and light trucks.

Both of these are considered all season tyres. Neither of them are runflat tyres. Both brands are considered to be in the premium part of the market.

Read on to see how each of these tyres stack up against each other!

How We Reviewed These Tyres

Unlike the Australian government, the European Union carries out standardised tests on all tyres sold in Europe. These tests are carried out in identical conditions, making them a reliable way to compare tyres.

For this review, we use averaged results from tests done on 23 sizes of these tyres by the European Union.

Fuel Efficiency

EU Grade
(A - E)
Compared to an A grade tyre?
Grandtrek AT5D0.3L/100km extra fuel consumption. ~$70 extra per year
Grandtrek AT20C0.2L/100km extra fuel consumption. ~$55 extra per year

The US Department of Energy estimates that around 25% of the fuel consumption of a vehicle is attributable to the tyres. That's a lot, and it means that choosing fuel efficient tyres can save you quite a bit of money.

The Grandtrek AT5 tyres rank a D on a scale of A to E in the official fuel efficiency tests carried out by the EU (they call these rolling resistance tests).

The Grandtrek AT20 tyres get a grade of C

Expect the lower grade tyre to consume an extra 0.1L/100km. This works out to $15 extra spent on petrol per year, based on a typical 12,000 km driven per year.

Here's a graph comparing the Grandtrek AT5 and Grandtrek AT20 tyres for fuel efficiency (1 = Grade E, 5 = Grade A).

Grip & Handling

EU Grade
(A - E)
Compared to an A grade tyre?
Grandtrek AT5D7.5 metre greater stopping distance when braking at 80km/h
Grandtrek AT20D7.5 metre greater stopping distance when braking at 80km/h

We'll now take a look at how these tyres compare in terms of grip and handling.

A good measure of this is 'wet grip', which is an indication of how well the tyres will allow the vehicle to come to a stop in wet conditions.

The Grandtrek AT5 tyres rank a D on a scale of A to E in the official fuel tests carried out by the EU.

The Grandtrek AT20 tyres, on the other hand, get a grade of D.

As their wet grip grade is the same, expect negligible differences in terms of braking distance.

Here's a graph comparing the Grandtrek AT5 and Grandtrek AT20 tyres for wet grip (1 = Grade E, 5 = Grade A).

Noise

EU Grade
(A - C)
Compared to an A grade tyre?
Grandtrek AT5B (72.1 dB)2 times as noisy
Grandtrek AT20B (71.3 dB)2 times as noisy

Another key factor to consider when choosing a tyre is road noise. Once you're over about 40 km/h, the dominant source of noise you hear is from the contact of your tyres on the road.

There is a surprisingly wide variation in the amount of noise each tyre makes.

The Grandtrek AT5 tyres produce 72.1 dB of road noise, which corresponds to a rank of B on a scale of A to C in the standardised testing done by the EU.

On the other hand, the Grandtrek AT20 tyres produce 71.3 dB of road noise, which means a grade of B.

As their noise grade is the same, don't expect many differences in terms of cabin noise.

Here's a visual representation of how the Grandtrek AT5 and Grandtrek AT20 tyres stack up for noise (1 = Grade C, 3 = Grade A).

Comfort

Based on the results of a number of tyre benchmarks, the Grandtrek AT20 scores 4 out of 5 for comfort. We don't have any comfort data for the Grandtrek AT5 tyres.

UTQG Data

Introduced by the National Highway Traffic Safety Administration (NHTSA) in the USA, the Uniform Tire Grading System (UTQG), is a system for comparing one tyre product to another on the basis of some standardised tests.

Grandtrek AT5Grandtrek AT20
Treadwear600300
Traction
(AA - C)
BB
Temperature Resistance
(A - C)
AB

Treadwear

As per the UTQG guidelines, the Grandtrek AT5 tyres have a treadwear rating of 600, whereas the Grandtrek AT20 tyres have a rating of 300. This means that the Grandtrek AT5 tyres will theoretically last 2.0 times as long as the Grandtrek AT20 tyres.

Traction

The UTQG system measures traction as straight-line braking in dry conditions. The scale is AA, A, B, C, with AA being the best grade, and C the worst.

As per the UTQG system, the Grandtrek AT5 tyres have a traction grading of B, whereas the Grandtrek AT20 tyres have a grading of B.

Temperature Resistance

The UTQG temperature resistance tests measure how well tyres can dissipate heat that builds up due to friction with the road. The scale is A, B, C, with A being the highest grade.

As per the UTQG system of tyre grading, the Grandtrek AT5 tyres have a temperature resistance grading of A, whereas the Grandtrek AT20 tyres have a grading of B (on a scale of A, B, C).

Warranty

Unfortunately, we don't have any warranty information available for either of these tyres.

Comparisons With Similar Tyres

Still on the fence about these tyres? Check out how they compare to other similar tyres on the market in Australia!

Summary

Let's now take a look at the main differences between these two sets of tyres.

For fuel efficiency, Grandtrek AT5 score a grade of D, which is below average. Grandtrek AT20 end up with a grade of C, which is more or less average.

More important is the wet grip, which gives you an indication of their traction and handling. In this regard, Grandtrek AT5 get a score of D, which is below average. Grandtrek AT20 end up with a grade of D, which is below average.

More important is the wet grip, which gives you an indication of their traction and handling. In this regard, Grandtrek AT5 get a score of B, which is about typical. Grandtrek AT20 end up with a grade of B, which is about typical.

The Grandtrek AT5 tyres have a UTQG treadwear rating of 600, whereas the Grandtrek AT20 tyres have a rating of 300.This means that you can expect the Grandtrek AT5 to last 2.0 times as long as the Grandtrek AT20 tyres.

The Grandtrek AT5 have a UTQG traction grading of B, while the Grandtrek AT20 tyres having a grading of B.

The Grandtrek AT5 have a UTQG temperature grading of A, while the Grandtrek AT20 tyres having a grading of B.

Full Size List (click to show)

Below is a list of all 33 sizes of the Grandtrek AT5, and all 16 sizes of the Grandtrek AT20 tyres sold in Australia, sorted by tyre width.

Grandtrek AT5 Sizes

Size
205/70 R15 96T
215/60 R17 100H
215/70 R16 100T
215/65 R16 98H
225/75 R16 110/107S
225/60 R17 99H
225/70 R16 103T
225/70 R15 100T
225/65 R17 102H
225/55 R18 98H
235/60 R18 103H
235/65 R17 108H
235/70 R16 106S
235/60 R16 100H
245/75 R16 114/111S
245/70 R16 111T
245/65 R17 107H
255/65 R16 109T
255/55 R18 109H
255/60 R18 112H
255/70 R16 111T
265/75 R16 112/109S
265/50 R20 111H
265/70 R15 112T
265/65 R17 112S
265/60 R18 110H
265/70 R16 112T
275/65 R17 115T
275/70 R16 114T
275/55 R20 113T
285/65 R17 116T
285/60 R18 120H
285/50 R20 112H

Grandtrek AT20 Sizes

Size
195/80 R15 96S
205 R16 110R
225/70 R17 108S
225/60 R18 99H
235/70 R16 104S
245/70 R17 108S
245/70 R16 111S XL
245/75 R16 109S
245/70 R17 110S
245/65 R17 111S
255/70 R17 108S
255/70 R16 111T
265/60 R18 110H
265/70 R17 113S
265/70 R16 112S
265/65 R17 112S
Louis from Tyre Geek

Louis

I'm Louis, an engineer passionate about helping Australians choose better tyres for their vehicles!