MTB Tire Test: Maxxis Aspen MaxxSpeed EXO/TR

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  • Maxxis Aspen MaxxSpeed EXO/TR
Performance compared to all other MTB tires
(100% is best)
Pro Members get 11-point radar charts



Maxxis Aspen MaxxSpeed EXO/TR road bike tire on a rolling resistance test machine

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Ad Buy Maxxis Aspen MaxxSpeed EXO/TR at Amazon.com

The Maxxis Aspen is one of Maxxis's most popular mountain bike tires, and it's now available with their race-winning MaxxSpeed compound. The new MaxxSpeed (not to be mistaken with their older 3C MaxxSpeed) compound uses a silica filler to improve both rolling performance and wet traction, which are critical ingredients for winning races.


We already tested the older 29x2.25 Maxxis Aspen EXO/TR (read our review) with the "Dual" compound, which will provide us with a baseline performance to see how much of an improvement the new MaxxSpeed compound brings. Maxxis claims the new MaxxSpeed compound reduces rolling resistance by 25%, which should result in a rolling resistance in our test of roughly 20 watts at 25 psi / 1.7 bars.


20 watts would be exciting as it would be competitive with some of the fastest-rolling mountain bike tires in the world. Maxxis also claims improved wet traction, which we would welcome, as the old "Dual" compound Aspen didn't perform that strong in our wet grip test. We're not expecting huge numbers in our hard-surface wet grip test, as the tread pattern on the Aspen is extremely "open", and it's just not made to grip well on hard surfaces.


For now, the MaxxSpeed Aspen is only available in the 29x2.4WT size, but it appears at least a 27.5-inch version is coming as well. We'll compare the 29x2.4WT Aspen MaxxSpeed against the 29x2.25 Aspen "Dual compound" and a range of mountain bike tires from other manufacturers with similar tread patterns/knob height.


Manufacturer Specifications


Manufacturer Specs
Brand Maxxis
Model Aspen MaxxSpeed EXO/TR
Year 2023
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range High
Buy At Ad Amazon.com
Manufacturer part number ETB00464700
TPI 120
Compound MaxxSpeed
Bead Folding
ETRTO 61-622
Size Inch 28"
Width Inch 2.40
Specified Weight 770 grams
Max Air Pressure (psi) 25
Made In Members Only
Available Sizes 29x2.4

Maxxis Aspen MaxxSpeed EXO/TR Test Results

Maxxis Aspen MaxxSpeed EXO/TR  mountain bike tire on a rolling resistance test machine

Size, Weight, and Thickness Measurements


Size, Weight, and Thickness Measurements
Specified Weight 770 grams
Measured Weight 778 grams
Measured Width Carcass 59 mm (un-round)
Measured Width Tread 62 mm
Measured Height 58 mm (un-round)
Measured Knob Height Center 2.2 mm
Measured Knob Height Edge 3.5 mm
Measured Total Thickness Center (excluding knobs) 2.3 mm
Measured Total Thickness Sidewall Members Only
All size measurements are taken at an air pressure of 35 psi / 2.4 bars on a 17.8 mm inner width rim.

Rolling Resistance Test Results


Rolling Resistance Test Results
Inner Tube None (40 ml sealant)
Rolling Resistance
55 PSI / 3.8 Bar
Members Only
Rolling Resistance
45 PSI / 3.1 Bar
Members Only
Rolling Resistance
35 PSI / 2.4 Bar
24.4 Watts
CRR: 0.00731
Rolling Resistance
25 PSI / 1.7 Bar
28.5 Watts
CRR: 0.00854
All numbers are for a single tire at a speed of 29 km/h / 18 mph and a load of 42.5 kg / 94 lbs.

Use the formula: RR (Watts) = CRR * speed (m/s) * load (N) to calculate rolling resistance at a given speed and load.

Puncture Resistance Test Results

Maxxis Aspen MaxxSpeed EXO/TR  mountain bike tire on a rolling resistance test machine
Puncture Resistance Test Results (higher is better)
Total Puncture Score Tread 38 Points
Total Puncture Score Sidewall Members Only
Tread Puncture Force Sharp Needle Members Only
Tread Puncture Force Blunt Needle Members Only
Tread Total Tire Thickness 2.3 mm
Sidewall Puncture Force Sharp Needle Members Only
Sidewall Puncture Force Blunt Needle Members Only
Sidewall Total Tire Thickness Members Only

Hard Surface Static Grip Test Results

Maxxis Aspen MaxxSpeed EXO/TR road bike tire on a grip test machine
Static Grip Test Results
Wet Grip Average 58 Points
Wet Grip Center Members Only
Wet Grip Edge Members Only
Measured Knob Height Center 2.2 mm
Measured Knob Height Edge 3.5 mm
Grip in points = coefficient of friction * 100
MTB grip test rim width = 30.0 mm
Wet Grip Test and Off-Road Tires (info)

Conclusion


  • Maxxis Aspen MaxxSpeed EXO/TR
Performance compared to all other MTB tires
(100% is fastest - lightest - highest - strongest)

Pro Members get 11-point radar charts

Unfortunately, we can't confirm the 25% reduction in rolling resistance that Maxxis claims. We see the Aspen MaxxSpeed behaving in the opposite direction with a rolling resistance that is roughly 8% higher than the 29x2.25 Aspen with the "Dual" compound that we tested in 2019 (read our review). We feel disappointed as a tire that comes with a "MaxxSpeed" compound should be up there with the fastest rolling mountain bike tires.


The MaxxSpeed name puzzles us even more when we look at the specified and measured weights of the Aspen MaxxSpeed. Both are much higher than the competition and the older 29x2.25 with "Dual" compound, even when we compensate for the higher volume of the 2.4 size. Some of the weight has gone into the puncture protection as the MaxxSpeed (unexpectedly?) performs much better in our puncture tests than the "Dual" compound version.


We do see an improvement in our hard surface wet grip test, but it's still extremely limited by the small knobs and very open tread pattern; The Aspen just isn't made to be a strong performer in this test.


Overall, the Maxxis Aspen with MaxxSpeed compound is still a decent performer, but we feel the "MaxxSpeed" name doesn't meet expectations.


Ad Buy Maxxis Aspen MaxxSpeed EXO/TR at Amazon.com


RATING: 3.5 / 5
TEST VERDICT:
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