CX/Gravel Tire Test: Schwalbe G-One RX Pro 45

Schwalbe has recently updated their new R line gravel bike tires, which are now known as the Pro versions. In addition to a new construction and compound, an extra tire has been added alongside the G-One R and G-One RS, which is called the G-One RX. The R line now consists of three tires, with the R as the all-round version, RS as the fast semi-slick, and the coarser RX as an option for rougher conditions.

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We already tested the 40 mm version with transparent sidewalls of the G-One RX (read our review). We found it to be a perfect addition to the G-One lineup for those who need more tread than the G-One R. This time, we're going to take a look at the 45 mm black sidewall version of the G-One RX. It will provide a first look at the differences between the larger and smaller sizes, as well as sidewall colors.

With the move to larger gravel bike tires in full force, we expect the 45 mm version of the G-One RX to be one of the most popular sizes. If you want to go even bigger, a 50 mm version is also available, with all sizes offered in either black or transparent sidewalls.

We've tested the 45 mm G-One RX with black sidewalls and will compare it to the 40 mm G-One RX with transparent sidewalls, as well as a selection of similar 40/45 mm gravel bike tires.

Manufacturer Specifications

Manufacturer Specs
Brand	Schwalbe
Model	G-One RX Pro
Year	2025
Supplied By	Bought in store
New or Used	New
Mileage	0 km
Price Range	High
Buy At	Ad Amazon.com
Manufacturer part number	11654579
EAN	4026495945981
TPI	67
Compound	Addix Race
Bead	Folding
ETRTO	45-622
Specified Weight	570 grams
Max Air Pressure (psi)	55
Made In	Members Only
Available Sizes	40-622 (700x40c) 45-622 (700x45c) 50-622 (700x50c)

Schwalbe G-One RX Pro 45 Test Results

Size, Weight, and Thickness Measurements

Size, Weight, and Thickness Measurements
Specified Weight	570 grams
Measured Weight	612 grams
Measured Width Casing	42 mm (un-round)
Measured Width Tread	44 mm
Measured Height	41 mm (un-round)
Measured Knob Height Center	2.1 mm
Measured Knob Height Edge	2.7 mm
Measured Total Thickness Center (excluding knobs)	2.40 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	None (30 ml sealant)
Measured Width	42 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 43-46 = 46 psi/3.2 bar 47-50 = 42 psi/2.9 barHigh Air Pressure (50 psi / 3.4 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 43-46 = 38 psi/2.6 bar 47-50 = 35 psi/2.4 barMedium Air Pressure (42 psi / 2.9 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 43-46 = 31 psi/2.1 bar 47-50 = 28 psi/1.9 barLow Air Pressure (33 psi / 2.3 bar)	18.0 Watts CRR: 0.00540
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 43-46 = 23 psi/1.6 bar 47-50 = 21 psi/1.4 barExtra Low Air Pressure (25 psi / 1.7 bar)	20.2 Watts CRR: 0.00606
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

Puncture Resistance Test Results (higher is better)
Total Puncture Score Tread	31 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	2.40 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

Static Grip Test Results
Wet Grip Average	55 Points
Wet Grip Center	Members Only
Wet Grip Edge	Members Only
Measured Knob Height Center	2.1 mm
Measured Knob Height Edge	2.7 mm
Grip in points = coefficient of friction * 100 CX/Gravel grip test rim width = 23.0 mm
Wet Grip Test and Off-Road Tires (info)

Conclusion

The 45 mm version of the Schwalbe G-One RX performs slightly less than the 40 mm version (read our review) in almost all of our tests. Only the knob height in the center of the tire is a bit better on the 45 mm version. The differences are minor, and with only two samples tested, it's challenging to draw a definitive conclusion, as there will always be some margin of error in the tests and manufacturing tolerances.

We consider the hard surface wet grip to be the most significant shortcoming, and it is even lower than that of the 40 mm version. The tread pattern simply isn't designed to offer grip on hard surfaces due to the reduced contact patch and inherent flexing of the large tread blocks required to grip well on soft surfaces. If you ride a lot on hard surfaces, that might be a factor to consider in your trade-off chart.

Still, the G-One RX is a strong performer in its class, and it's a tire you can't go wrong with if you need this level of off-road performance.

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RATING: 4.5 / 5
TEST VERDICT: Highly Recommended

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