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Hahaha you think I care about rolling resistance on this bike? The tyres that the Kojaks replaced weighed over a kilo.. each! They didn't roll so much as crushed everything in their path.
https://www.schwalbetires.com/bike_tires/off-road_tires/crazy_bob
The Kojaks went on because it makes the bike faster, lower and easier to carry up stairs. I was thinking about putting the Bobs on again just for the silly factor.
Because.