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

Contents and Test Summary

  1. Manufacturer Specifications
  2. Size and Weight Measurements
  3. Rolling Resistance Test Results
  4. Puncture Resistance Test Results
  5. Static Grip Test Results
  6. Conclusion
  • Panaracer GravelKing SK TLC 40
  • Tufo Gravel Thundero 40
Performance compared to all other CX/Gravel tires
(100% is best)
Pro Members get 11-point radar charts

Manufacturer Specifications


Manufacturer Specifications
Brand PanaracerTufo
Model GravelKing SK TLC 40Gravel Thundero 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
Buy At
Manufacturer Part Number RF738-GKSK-B-
EAN 49312530162578592723054894
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 Pro DataPro Data
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)
44-622 (700x44c)
Image 1
Panaracer GravelKing SK TLC 40 2020
Tufo Gravel Thundero 40 2022
Image 2
Panaracer GravelKing SK TLC 40 2020
Tufo Gravel Thundero 40 2022
Image 3
Panaracer GravelKing SK TLC 40 2020
Tufo Gravel Thundero 40 2022
Image 4 Not Available
Tufo Gravel Thundero 40 2022

Size and Weight Measurements


Size and Weight Measurements
Model GravelKing SK TLC 40Gravel Thundero 40
Specified Weight 420 grams430 grams
Measured Weight 404 grams460 grams
Measured Width Casing 37 mm (un-round)38 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 mm1.5 mm
Measured Knob Height Edge 1.7 mm2.1 mm
Measured Casing Thickness Center 1.70 mm1.80 mm
Measured Total Thickness Sidewall Pro DataPro Data
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
Model GravelKing SK TLC 40Gravel Thundero 40
Spin Up Video YouTubeYouTube
Inner Tube None (30 ml sealant)None (30 ml sealant)
Measured Width 37 mm38 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		 Pro DataPro Data
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		 Pro DataPro Data
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		 20.9 Watts
CRR: 0.00626
(36 psi / 2.6 bar)		17.4 Watts
CRR: 0.00522
(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
43-46 = 23 psi/1.6 bar
47-50 = 21 psi/1.4 barExtra Low Air Pressure		 Pro DataPro Data
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 Thundero 40
Total Puncture Score Tread 28 Points33 Points
Total Puncture Score Sidewall Pro DataPro Data
Tread Puncture Force Sharp Needle Pro DataPro Data
Tread Puncture Force Blunt Needle Pro DataPro Data
Tread Total Tire Thickness 1.7 mm1.8 mm
Sidewall Puncture Force Sharp Needle Pro DataPro Data
Sidewall Puncture Force Blunt Needle Pro DataPro Data
Sidewall Total Tire Thickness Pro DataPro Data

Static Grip Test Results


Static Grip Test Results (higher is better)
Model GravelKing SK TLC 40Gravel Thundero 40
Wet Grip Average 64 Points72 Points
Wet Grip Center Pro DataPro Data
Wet Grip Edge Pro DataPro Data
Measured Knob Height Center 1.7 mm1.5 mm
Measured Knob Height Edge 1.7 mm2.1 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


Conclusion
Model GravelKing SK TLC 40Gravel Thundero 40
Full Review Full ReviewFull Review
Verdict RecommendedHighly Recommended
Rating 4.0 / 55.0 / 5
Buy At
  • Panaracer GravelKing SK TLC 40
  • Tufo Gravel Thundero 40
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)
Pro Members get 11-point radar charts