CX/Gravel Tire Comparison:
Maxxis Rambler EXO/TR 120 TPI 40 2021 vs
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
  • Maxxis Rambler EXO/TR 120 TPI 40
  • 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 MaxxisPanaracerTufo
Model Rambler EXO/TR 120 TPI 40GravelKing SK TLC 40Gravel Thundero 40
Year 202120202022
Supplied By Bought in storeBought in storeBought in store
Full Review Full ReviewFull ReviewFull Review
New or Used NewNewNew
Mileage 0 km0 km0 km
Price Range HighHighHigh
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Manufacturer Part Number ETB00195800RF738-GKSK-B-
EAN 471778403807049312530162578592723054894
TPI 120-210/375
Compound DualZSG-
Bead FoldingFoldingFolding
ETRTO 40-62240-62240-622
Specified Weight 440 grams420 grams430 grams
Min Air Pressure 35 psi psi30 psi
Max Air Pressure 60 psi75 psi70 psi
Made In Members OnlyMembers OnlyMembers Only
Available Sizes 38-622 (700x38c)
40-622 (700x40c)
45-622 (700x45c)
50-622 (700x50c)
47-584 (650x47b)		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
Maxxis Rambler EXO/TR 120 TPI 40 2021
Panaracer GravelKing SK TLC 40 2020
Tufo Gravel Thundero 40 2022
Image 2
Maxxis Rambler EXO/TR 120 TPI 40 2021
Panaracer GravelKing SK TLC 40 2020
Tufo Gravel Thundero 40 2022
Image 3
Maxxis Rambler EXO/TR 120 TPI 40 2021
Panaracer GravelKing SK TLC 40 2020
Tufo Gravel Thundero 40 2022
Image 4 Not AvailableNot Available
Tufo Gravel Thundero 40 2022

Size and Weight Measurements


Size and Weight Measurements
Model Rambler EXO/TR 120 TPI 40GravelKing SK TLC 40Gravel Thundero 40
Specified Weight 440 grams420 grams430 grams
Measured Weight 420 grams404 grams460 grams
Measured Width Casing 39 mm (un-round)37 mm (un-round)38 mm (un-round)
Measured Width Tread 40 mm36 mm40 mm
Measured Height 37 mm (un-round)35 mm (un-round)35 mm (un-round)
Measured Knob Height Center 1.4 mm1.7 mm1.5 mm
Measured Knob Height Edge 1.8 mm1.7 mm2.1 mm
Measured Casing Thickness Center 1.80 mm1.70 mm1.80 mm
Measured Total Thickness Sidewall Members OnlyMembers OnlyMembers 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
Model Rambler EXO/TR 120 TPI 40GravelKing SK TLC 40Gravel Thundero 40
Spin Up Video YouTubeYouTubeYouTube
Inner Tube None (30 ml sealant)None (30 ml sealant)None (30 ml sealant)
Measured Width 39 mm37 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		 Members OnlyMembers 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
43-46 = 38 psi/2.6 bar
47-50 = 35 psi/2.4 barMedium Air Pressure		 Members OnlyMembers 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
43-46 = 31 psi/2.1 bar
47-50 = 28 psi/1.9 barLow Air Pressure		 25.0 Watts
CRR: 0.00749
(33 psi / 2.3 bar)		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		 29.5 Watts
CRR: 0.00884
(25 psi / 1.7 bar)		23.3 Watts
CRR: 0.00698
(27 psi / 1.9 bar)		20.0 Watts
CRR: 0.00600
(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 Rambler EXO/TR 120 TPI 40GravelKing SK TLC 40Gravel Thundero 40
Total Puncture Score Tread 28 Points28 Points33 Points
Total Puncture Score Sidewall Members OnlyMembers OnlyMembers Only
Tread Puncture Force Sharp Needle Members OnlyMembers OnlyMembers Only
Tread Puncture Force Blunt Needle Members OnlyMembers OnlyMembers Only
Tread Total Tire Thickness 1.8 mm1.7 mm1.8 mm
Sidewall Puncture Force Sharp Needle Members OnlyMembers OnlyMembers Only
Sidewall Puncture Force Blunt Needle Members OnlyMembers OnlyMembers Only
Sidewall Total Tire Thickness Members OnlyMembers OnlyMembers Only

Static Grip Test Results


Static Grip Test Results (higher is better)
Model Rambler EXO/TR 120 TPI 40GravelKing SK TLC 40Gravel Thundero 40
Wet Grip Average 63 Points64 Points72 Points
Wet Grip Center Members OnlyMembers OnlyMembers Only
Wet Grip Edge Members OnlyMembers OnlyMembers Only
Measured Knob Height Center 1.4 mm1.7 mm1.5 mm
Measured Knob Height Edge 1.8 mm1.7 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 Rambler EXO/TR 120 TPI 40GravelKing SK TLC 40Gravel Thundero 40
Full Review Full ReviewFull ReviewFull Review
Verdict RecommendedRecommendedHighly Recommended
Rating 3.0 / 54.0 / 55.0 / 5
Buy At Ad Amazon.comAd Amazon.com
  • Maxxis Rambler EXO/TR 120 TPI 40
  • 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