CX/Gravel Tire Test: Continental Terra Speed TR (Protection) 40

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  • Continental Terra Speed TR (Protection) 40
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)
Pro Members get 9-point radar charts

Continental Terra Speed TR (Protection) 40 road bike tire on a rolling resistance test machine

This is a test of the 40 mm (40-622) version of the Continental Terra Speed TR. We already tested the 35 mm (35-622) version of the Terra Speed TR (read our review) last year and found it to be the fastest CX/Gravel tire that still offers a somewhat knobby tread. As the 40 mm tires seem to be a bit more popular on gravel bikes, many of our Pro Members were curious how the 40 mm version compares to the 35 mm version.


Ad Buy Continental Terra Speed TR (Protection) 40 at Amazon.com


On paper, both the 35 and 40 mm versions of the Terra Speed appear to be the same as they both use the same tread pattern, the same familiar 3/180 TPI Continental casing, and the well-known Continental Black Chili compound. From the information published on Continental's website, we expected the 35 mm and 40 mm versions to be nearly the same tires.


We did notice something strange in the specified weight of these tires: the specified weight of the 40-622 version is much higher than the 35-622 version (14% size increase, 29% weight increase). Even more remarkable is that the 40-622 Terra Speed is heavier than the 40-622 Terra Trail, which is a tire made for somewhat heavier conditions.


From the specified weight alone, we can be quite certain that the 40-622 version of the Terra Speed is a different tire than the 35-622 version that we tested last year. As most people that visit this site want to know every detail about their tires, we've done the tests that clearly show where the extra weight has gone and how this affects the performance of the Terra Speed.


Manufacturer Specifications


Manufacturer Specs
Brand Continental
Model Terra Speed TR (Protection) 40
Year 2021
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range High
Buy At Ad Amazon.com
Manufacturer part number 0101694
EAN4019238027099
TPI 3/180
Compound Black Chili
Bead Folding
ETRTO 40-622
Specified Weight 465 grams
Max Air Pressure (psi) 73
Made In Members Only
Available Sizes 35-622 (700x35c)
40-622 (700x40c)
35-584 (650x35b)
40-584 (650x40b)

Continental Terra Speed TR (Protection) 40 Test Results

Continental Terra Speed TR (Protection) 40  mountain bike tire on a rolling resistance test machine

Size, Weight, and Thickness Measurements


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Size, Weight, and Thickness Measurements
Specified Weight 465 grams
Measured Weight 461 grams
Measured Width Casing 38 mm (un-round)
Measured Width Tread 38 mm
Measured Height 35 mm (un-round)
Measured Knob Height Center 1.2 mm
Measured Knob Height Edge 1.2 mm
Measured Total Thickness Center (excluding knobs) 2.30 mm
Measured Total Thickness Sidewall Members Only
All size measurements are taken at low air pressure on a 17.8 mm inner width rim.

Rolling Resistance Test Results


Rolling Resistance Test Results
Inner Tube Conti Cross28 (160 gr)
Measured Width 38 mm
Rolling Resistance
Real tire width in mm:
30-32 = 66 psi/4.6 bar
33-35 = 60 psi/4.1 bar
36-38 = 54 psi/3.7 bar
39-42 = 50 psi/3.4 bar
High Air Pressure

(54 psi / 3.7 bar)
Members Only
Rolling Resistance
Real tire width in mm:
30-32 = 55 psi/3.8 bar
33-35 = 50 psi/3.4 bar
36-38 = 45 psi/3.1 bar
39-42 = 42 psi/2.9 bar
Medium Air Pressure

(45 psi / 3.1 bar)
Members Only
Rolling Resistance
Real tire width in mm:
30-32 = 44 psi/3.0 bar
33-35 = 40 psi/2.8 bar
36-38 = 36 psi/2.6 bar
39-42 = 33 psi/2.3 bar
Low Air Pressure

(36 psi / 2.6 bar)
21.6 Watts
CRR: 0.00647
Rolling Resistance
Real tire width in mm:
30-32 = 33 psi/2.3 bar
33-35 = 30 psi/2.1 bar
36-38 = 27 psi/1.9 bar
39-42 = 25 psi/1.7 bar
Extra Low Air Pressure

(27 psi / 1.9 bar)
25.6 Watts
CRR: 0.00767
The CX/Gravel section is a multi tire size section, air pressures have been adjusted to the measured casing width.

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

Continental Terra Speed TR (Protection) 40  mountain bike tire on a rolling resistance test machine
Puncture Resistance Test Results (higher is better)
Total Puncture Score Tread 42 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 2.30 mm
Sidewall Puncture Force Sharp Needle Members Only
Sidewall Puncture Force Blunt Needle Members Only
Sidewall Total Tire Thickness Members Only

Conclusion


  • Continental Terra Speed TR (Protection) 40
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)

Pro Members get 9-point radar charts

The 40 mm Terra Speed is not just a slightly larger version when compared to the 35 mm Terra Speed, but the construction also has been beefed up. The obvious difference can be found in the thickness of the tread (+ 0.4 mm) and the thickness of the sidewalls (+ 0.1 mm). This extra material results in a stronger and more durable tire, which also shows in the tread puncture test where the 40 mm Terra Speed performs ~ 30% better.


Luckily, this somewhat heavier construction hardly affects the performance in the rolling resistance tests. The low rolling resistance indicates the compound is the same (fast) version of the Black Chili compound and not a slower, grippier version that they use on some of their other off-road tires. All in all, the 40 mm version of the Terra Speed looks like an even better tire than the 35 mm version if you don't mind the increased weight.


Jump over to our comparison section to fully compare the 35 mm and 40 mm versions of the Terra Speed: Terra Speed 35 vs Terra Speed 40


Ad Buy Continental Terra Speed TR (Protection) 40 at Amazon.com


RATING: 5.0 / 5
TEST VERDICT:
Highly Recommended


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