Originally Posted by Ritterview

Now to spice things up vs. the Schwalbe One is the Continental GP 4000 S II, analyzed here.

It comes in 28 mm in black and reflex.



A table at Slow Twitch I think shows that the 28's have the least resistance. Is this really for a 50 kg rider? Or is that 50 kg on maybe the rear tire? So with our 28's we are not only reducing the risk of pinch flats, and increasaing ride comfort, we are also reducing rolling resistance. This effect must be magnified with the greater weights of a tandem. We have 140 kg total, figuring 55% on the rear wheel makes it 77 kg.


Finally, let’s talk rolling resistance. Similar to the story I’ve heard from Specialized and Schwalbe, Continental says that larger tires roll faster. Here’s a breakdown of their four width options in the GP4000 S II (Crr on the Y axis, pressure on the X axis)