CX/Gravel Tire Test: Specialized Roubaix Pro 2Bliss Ready

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  • Specialized Roubaix Pro 2Bliss Ready
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)
Pro Members get 9-point radar charts

Specialized Roubaix Pro 2Bliss Ready road bike tire on a rolling resistance test machine

NOTE: This Specialized Roubaix Pro 2Bliss Ready 30/32 was tested as a CX-Gravel tire at low air pressures and with a butyl inner tube (CX-Gravel standard protocol).

The Specialized Roubaix Pro 2 Bliss Ready in the 700 x 30/32 size is a road bike tire that's also quite popular as a gravel bike tire. What makes the Roubaix Pro usable as a gravel bike tire is its volume and the "Endurant" tubeless-ready casing that comes with bead-to-bead puncture protection.


On top of the bead-to-bead protected casing, we even find an extra layer of Specialized's "BlackBelt" anti-puncture material that adds even more protection to the center of the tread. The Roubaix Pro also comes with the Specialized Gripton compound that we've found to be one of the fastest rolling and best gripping compounds (see road bike tires overview).


The 2Bliss Ready (tubeless-ready) version of the Roubaix Pro is only available in the special 700x30/32 size, which seems to come very close to the 32-622 / 700x32c size of other tires. Specialized also carries a non 2Bliss Ready version of the Roubaix Pro, which is a bit lighter and available in the 700x23/25, 700x25/28, and 700x30/32 sizes.


Manufacturer Specifications


Manufacturer Specs
Brand Specialized
Model Roubaix Pro 2Bliss Ready
Year 2021
Supplied By Bought in store
New or Used New
Mileage 0 km
Price Range High
Buy At
Manufacturer part number 00016-2162
TPI 120
Compound Gripton
Bead Folding
ETRTO 32-622
Specified Weight 375 grams
Max Air Pressure (psi) 90
Made In Members Only
Available Sizes 32-622 (700x32c)

Specialized Roubaix Pro 2Bliss Ready Test Results

Specialized Roubaix Pro 2Bliss Ready  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 375 grams
Measured Weight 366 grams
Measured Width Casing 32 mm (un-round)
Measured Width Tread 31 mm
Measured Height 30 mm (un-round)
Measured Knob Height Center 0.0 mm
Measured Knob Height Edge 0.2 mm
Measured Total Thickness Center (excluding knobs) 3.00 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 32 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

(66 psi / 4.6 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

(55 psi / 3.8 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

(44 psi / 3.0 bar)
23.5 Watts
CRR: 0.00704
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

(33 psi / 2.3 bar)
27.8 Watts
CRR: 0.00833
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

Specialized Roubaix Pro 2Bliss Ready  mountain bike tire on a rolling resistance test machine
Puncture Resistance Test Results (higher is better)
Total Puncture Score Tread 56 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 3.00 mm
Sidewall Puncture Force Sharp Needle Members Only
Sidewall Puncture Force Blunt Needle Members Only
Sidewall Total Tire Thickness Members Only

Conclusion


  • Specialized Roubaix Pro 2Bliss Ready
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)

Pro Members get 9-point radar charts

Although the Specialized Roubaix Pro 2Bliss Ready isn't the fastest rolling tire out there, we do see good reasons to use it as a CX/Gravel bike tire. Puncture resistance of both the tread and sidewalls is very good and even better than most dedicated gravel bike tires thanks to the extra layer of puncture protective material under the tread. The actual size and corresponding volume of the 700x30/32 size are also very good while keeping weight relatively low.


Based on our test results, we definitely see gravel bike use cases for the Roubaix Pro 2Bliss Ready. On top of that, if the Gripton compound on the Roubaix Pro is the exact same compound as used on Specialized's Turbo RapidAir 2Bliss Ready, it might be one of the best gripping tires around.


RATING: 4.0 / 5
TEST VERDICT:
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