SCREWED

I read an article in a magazine about mountainbike ice racing , on frozen lakes , in Canada , or somewhere . It was the 1980s when I read it , so I'm kinda sketchy on the details.
Anyway , I do remember the guys screwed pan-head sheetmetal screws through the tread for grip.
Well , it works .






Here , some video . Expect a proper ride report / test sometime soon.
Before all the ice melts would be ideal.