Special Articles
Road Bike Special: Continental Grand Prix 5000 Endurance Test
Published: 2019-07-12 | Jarno Bierman
Endurance test of a pair of Grand Prix 5000 with measurements every 620 miles / 1000 km Read Review
Road Bike Special: Continental Grand Prix 5000 Comparison
Published: 2019-02-19 | Jarno Bierman
Comparison between a 23, 25, 28, and 32 mm Continental Grand Prix 5000 Read Review
Road Bike Special: Worn vs New Grand Prix 4000S II
Published: 2018-6-12 | Jarno Bierman
Comparison between a new and a worn Continental Grand Prix 4000S II Read Review
Fat Bike Special: Tubeless vs Inner Tubes Comparison
Published: 2015-10-31 | Jarno Bierman
Rolling resistance comparison of tubeless and tubed fat bike tires Read Review
Tour/E-Bike Special: Schwalbe Marathon 32, 37, 40, 47 Compared
Published: 2015-12-04 | Jarno Bierman
Rolling resistance comparison between a 32, 37, 40 and 47 mm Schwalbe Marathon Read Review
Road Bike Special: Continental GP4000S II Comparison - 23, 25, 28 mm Compared
Published: 2015-02-26 | Jarno Bierman
Rolling resistance comparison between a 23, 25 and 28 mm GP4000S II Read Review
Road Bike Special: Tubeless Vs Latex, Light, and Standard Inner Tubes
Published: 2014-11-24 | Jarno Bierman
The complete guide: Tubeless vs light tubes vs latex tubes vs standard tubes Read Review
MTB Special: Tubeless vs Latex Tube vs Butyl Tube. A Rolling Resistance Comparison
Published: 2014-07-25 | Jarno Bierman
All you need to know about the rolling resistance of inner tubes and tubeless setups. Read Review
Road Bike Special: The Effect of Tubeless Sealant on Rolling Resistance
Published: 2014-10-15 | Jarno Bierman
How much does adding tubeless sealant to road bike tires influence rolling resistance? Read Review
Road Bike Special: Panaracer R'Air Inner Tube
Published: 2015-01-02 | Jarno Bierman
Rolling resistance of a Panaracer R'Air inner tube and other inner tubes Read Review