As Py's wheels are two-way-fit, they can take the still fairly new Fusion 2 Road Tubeless tires instead of regular clinchers. This is really tubeless, just like a car tire, not tubular!
He still was a bit skeptical and watched the pressure over the last days, but nothing, just sitting there w/o a change until this morning -- so good so far. He checked and adjusted the pressure to the recommended 6.5-7.0 bar (max allowed is 8.7bar), a little less than he usually runs his GP4k. Still for precaution he took two tubes along, just in case -- they can fit tubes just like normal clinchers if needed!
Meeting Marco at Tildas for the ride and leaving on time at 8am. A nice and warm morning, just a bit humid, about 92%. Going east at good pace, drafting at about 20..25mph -- he some how felt a bit more sticking to the pavement and rolling less easy -- but this is really hard to judge w/o a power meter he does not own. However, flying over rough roads at "the tanks" the bike formally stayed on ground very nicely with great control -- unless with just 0.5bars more in the GP4k where at time he felt like the rear wheel get's air at bumps at times. So that is good, also fast turns felt great, a bit different.
The return was just as uneventful and fast as the ride out east. The weather hold off the expected rain as predicted. Still hard to say if they roll easier as claimed, but he will bump up the tire pressure to his usual number and see again.
Good thing -- they work, they do not loose any pressure so far, they feel good. Efficiency -- to be evaluated in more detail and with precision...
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