CX/Gravel Tire Comparison:
Panaracer GravelKing SK TLC 40 2020 vs
Tufo Gravel Speedero 40 2022

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Manufacturer Specifications


Manufacturer Specifications
Brand PanaracerTufo
Model GravelKing SK TLC 40Gravel Speedero 40
Year 20202022
Supplied By Bought in storeBought in store
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range HighHigh
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Manufacturer Part Number RF738-GKSK-B-
EAN 49312530162578592723054948
TPI -210/375
Compound ZSG-
Bead FoldingFolding
ETRTO 40-62240-622
Specified Weight 420 grams430 grams
Min Air Pressure psi30 psi
Max Air Pressure 75 psi70 psi
Made In Members OnlyMembers Only
Available Sizes 32-622 (700x32c)
35-622 (700x35c)
40-622 (700x38c)
43-622 (700x43c)
50-622 (700x50c)
43-584 (650bx43)
48-584 (650bx48)
54-584 (650bx54)
26x2.10
36-622 (700x36c)
40-622 (700x40c)
Image
Panaracer GravelKing SK TLC 2020
Tufo Gravel Speedero 2022
Image
Panaracer GravelKing SK TLC 2020
Tufo Gravel Speedero 2022
Image
Panaracer GravelKing SK TLC 2020
Tufo Gravel Speedero 2022

Size and Weight Measurements


Size and Weight Measurements
Model GravelKing SK TLC 40Gravel Speedero 40
Specified Weight 420 grams430 grams
Measured Weight 404 grams445 grams
Measured Width Casing 37 mm (un-round)37 mm (un-round)
Measured Width Tread 36 mm40 mm
Measured Height 35 mm (un-round)35 mm (un-round)
Measured Knob Height Center 1.7 mm1.3 mm
Measured Knob Height Edge 1.7 mm1.3 mm
Measured Total Thickness Sidewall Members OnlyMembers Only
Measured Casing Thickness Center 1.70 mm1.70 mm
All size measurements are taken at low air pressure on a 17.8 mm inner width rim.

Rolling Resistance Test Results


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Rolling Resistance Test Results
Model GravelKing SK TLC 40Gravel Speedero 40
Spin Up Video YouTubeYouTube
Inner Tube Conti Cross28 (160 gr)Conti Cross28 (160 gr)
Measured Width 37 mm37 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
Members OnlyMembers 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
Members OnlyMembers 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
24.7 Watts
CRR: 0.00740
(36 psi / 2.6 bar)
21.3 Watts
CRR: 0.00638
(36 psi / 2.6 bar)
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
28.3 Watts
CRR: 0.00848
(27 psi / 1.9 bar)
25.0 Watts
CRR: 0.00749
(27 psi / 1.9 bar)
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)
Model GravelKing SK TLC 40Gravel Speedero 40
Total Puncture Score Tread 28 Points33 Points
Total Puncture Score Sidewall Members OnlyMembers Only
Tread Puncture Force Sharp Needle Members OnlyMembers Only
Tread Puncture Force Blunt Needle Members OnlyMembers Only
Tread Total Tire Thickness 1.7 mm1.7 mm
Sidewall Puncture Force Sharp Needle Members OnlyMembers Only
Sidewall Puncture Force Blunt Needle Members OnlyMembers Only
Sidewall Total Tire Thickness Members OnlyMembers Only

Static Grip Test Results


Static Grip Test Results (higher is better)
Model GravelKing SK TLC 40Gravel Speedero 40
Wet Grip Average 64 Points78 Points
Wet Grip Center Members OnlyMembers Only
Wet Grip Edge Members OnlyMembers Only
Measured Knob Height Center 1.7 mm1.3 mm
Measured Knob Height Edge 1.7 mm1.3 mm
Grip in points = coefficient of friction * 100
Wet Grip Test and Off-Road Tires (info)

Conclusion


Conclusion
Model GravelKing SK TLC 40Gravel Speedero 40
Full Review Full ReviewFull Review
Verdict RecommendedHighly Recommended
Rating 4.0 / 55.0 / 5
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  • Panaracer GravelKing SK TLC 40
  • Tufo Gravel Speedero 40
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)

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