CX/Gravel Tire Comparison:
Challenge Gravel Grinder 2020 vs
Rene Herse Steilacoom TC 2021

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Contents and Test Summary

  1. Manufacturer Specifications
  2. Size and Weight Measurements
  3. Rolling Resistance Test Results
  4. Puncture Resistance Test Results
  5. Conclusion
  • Challenge Gravel Grinder
  • Rene Herse Steilacoom TC
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)
Pro Members get 9-point radar charts

Manufacturer Specifications


Manufacturer Specifications
Brand ChallengeRene Herse
Model Gravel GrinderSteilacoom TC
Year 20202021
Supplied By Bought in storeBought in store
Full Review Full ReviewFull Review
New or Used NewNew
Mileage 0 km0 km
Price Range HighVery High
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Manufacturer Part Number 00535RF738TCX-LX-CP
EAN 8855627005356
TPI 260-
Compound
Bead FoldingFolding
ETRTO 33-62238-622
Specified Weight 0 grams445 grams
Min Air Pressure 35 psi psi
Max Air Pressure 75 psi75 psi
Made In Members OnlyMembers Only
Available Sizes 33-622 (700x33x)
36-622 (700x36c)
38-622 (700x38c)
Image
Challenge Gravel Grinder 2020
Rene Herse Steilacoom TC 2021
Image
Challenge Gravel Grinder 2020
Rene Herse Steilacoom TC 2021
Image
Challenge Gravel Grinder 2020
Rene Herse Steilacoom TC 2021

Size and Weight Measurements


Size and Weight Measurements
Model Gravel GrinderSteilacoom TC
Specified Weight 0 grams445 grams
Measured Weight 412 grams435 grams
Measured Width Casing 33 mm (un-round)35 mm (un-round)
Measured Width Tread 33 mm36 mm
Measured Height 31 mm (un-round)34 mm (un-round)
Measured Knob Height Center 0.7 mm2.9 mm
Measured Knob Height Edge 2.3 mm2.9 mm
Measured Total Thickness Sidewall Members OnlyMembers Only
Measured Casing Thickness Center 2.60 mm2.00 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 Gravel GrinderSteilacoom TC
Spin Up Video YouTubeYouTube
Inner Tube Conti Cross28 (160 gr)Conti Cross28 (160 gr)
Measured Width 33 mm35 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
28.7 Watts
CRR: 0.00860
26.9 Watts
CRR: 0.00806
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
33.9 Watts
CRR: 0.01016
30.0 Watts
CRR: 0.00899
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 Gravel GrinderSteilacoom TC
Total Puncture Score Tread 62 Points27 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 2.6 mm2 mm
Sidewall Puncture Force Sharp Needle Members OnlyMembers Only
Sidewall Puncture Force Blunt Needle Members OnlyMembers Only
Sidewall Total Tire Thickness Members OnlyMembers Only

Conclusion


Conclusion
Model Gravel GrinderSteilacoom TC
Full Review Full ReviewFull Review
Verdict RecommendedRecommended
Rating 3.5 / 53.5 / 5
Buy At Ad Amazon.com
  • Challenge Gravel Grinder
  • Rene Herse Steilacoom TC
Performance compared to all other CX/Gravel tires
(100% is fastest - lightest - highest - strongest)

Pro Members get 9-point radar charts


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