CX/Gravel Tire Comparison:
Bontrager GR1 Team Issue 40 2023 vs
Panaracer GravelKing SK TLC 40 2020
Contents and Test Summary
- Manufacturer Specifications
- Size and Weight Measurements
- Rolling Resistance Test Results
- Puncture Resistance Test Results
- Static Grip Test Results
- Conclusion
- Bontrager GR1 Team Issue 40
- Panaracer GravelKing SK TLC 40
Performance compared to all other CX/Gravel tires
(100% is best)
(100% is best)
Pro Members get 11-point radar charts
Manufacturer Specifications
| Manufacturer Specifications | ||
|---|---|---|
| Brand | Bontrager | Panaracer |
| Model | GR1 Team Issue 40 | GravelKing SK TLC 40 |
| Year | 2023 | 2020 |
| Supplied By | Bought in store | Bought in store |
| Full Review | Full Review | Full Review |
| New or Used | New | New |
| Mileage | 0 km | 0 km |
| Price Range | High | High |
| Buy At | Ad Amazon.com | |
| Manufacturer Part Number | 571129 | RF738-GKSK-B |
| EAN | 4931253016257 | |
| TPI | 120 | - |
| Compound | 60a/52a | ZSG |
| Bead | Folding | Folding |
| ETRTO | 40-622 | 40-622 |
| Specified Weight | 430 grams | 420 grams |
| Min Air Pressure | psi | psi |
| Max Air Pressure | 50 psi | 75 psi |
| Made In | Members Only | Members Only |
| Available Sizes | 35-622 (700x35c) 40-622 (700x40c) | 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 |
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| Image 2 |  |  |
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| Image 4 |  | Not Available |
Size and Weight Measurements
| Size and Weight Measurements | ||
|---|---|---|
| Model | GR1 Team Issue 40 | GravelKing SK TLC 40 |
| Specified Weight | 430 grams | 420 grams |
| Measured Weight | 437 grams | 404 grams |
| Measured Width Casing | 39 mm (un-round) | 37 mm (un-round) |
| Measured Width Tread | 39 mm | 36 mm |
| Measured Height | 37 mm (un-round) | 35 mm (un-round) |
| Measured Knob Height Center | 1.2 mm | 1.7 mm |
| Measured Knob Height Edge | 1.2 mm | 1.7 mm |
| Measured Casing Thickness Center | 1.60 mm | 1.70 mm |
| Measured Total Thickness Sidewall | Members Only | 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 | ||
|---|---|---|
| Model | GR1 Team Issue 40 | GravelKing SK TLC 40 |
| Spin Up Video | YouTube | YouTube |
| Inner Tube | None (30 ml sealant) | None (30 ml sealant) |
| Measured Width | 39 mm | 37 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 Only | 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 |
Members Only | 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 |
30.4 Watts CRR: 0.00911 (33 psi / 2.3 bar) | 20.9 Watts CRR: 0.00626 (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 |
36.2 Watts CRR: 0.01085 (25 psi / 1.7 bar) | 23.3 Watts CRR: 0.00698 (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 | GR1 Team Issue 40 | GravelKing SK TLC 40 |
| Total Puncture Score Tread | 24 Points | 28 Points |
| Total Puncture Score Sidewall | Members Only | Members Only |
| Tread Puncture Force Sharp Needle | Members Only | Members Only |
| Tread Puncture Force Blunt Needle | Members Only | Members Only |
| Tread Total Tire Thickness | 1.6 mm | 1.7 mm |
| Sidewall Puncture Force Sharp Needle | Members Only | Members Only |
| Sidewall Puncture Force Blunt Needle | Members Only | Members Only |
| Sidewall Total Tire Thickness | Members Only | Members Only |
Static Grip Test Results
| Static Grip Test Results (higher is better) | ||
|---|---|---|
| Model | GR1 Team Issue 40 | GravelKing SK TLC 40 |
| Wet Grip Average | 73 Points | 64 Points |
| Wet Grip Center | Members Only | Members Only |
| Wet Grip Edge | Members Only | Members Only |
| Measured Knob Height Center | 1.2 mm | 1.7 mm |
| Measured Knob Height Edge | 1.2 mm | 1.7 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
| Conclusion | ||
|---|---|---|
| Model | GR1 Team Issue 40 | GravelKing SK TLC 40 |
| Full Review | Full Review | Full Review |
| Verdict | Not Recommended | Recommended |
| Rating | 2.0 / 5 | 4.0 / 5 |
| Buy At | Ad Amazon.com | |
- Bontrager GR1 Team Issue 40
- Panaracer GravelKing SK TLC 40
(100% is fastest - lightest - highest - strongest)
Pro Members get 11-point radar charts