And the Greenspeed Scorcher tires are beginning to react to the low temperature. Until now they kept rolling good but now with temperatures well below zero they do get noticeably slower and also less distance in the roll-out. Still nothing compared to the spectacular dive from the Shredda tires. But anyway, this is a good moment to switch again to the Pro-One tires and see how well they do in the cold. I have them already on separate wheels, so switching from Scorcher to Pro-One is a matter of minutes. Another reason to switch to Pro-One is the fact that they are narrower and my experience with narrower tires in the snow and ice is a good one. Better contact with the road because they tend to cut through fresh snow much easier and once the snow is compacted and has car tracks in it, it really makes no difference even if you have studded tires or spikes: the velomobile will follow the track anyway.