Took the afternoon to do something I've been meaning to do for a while now. It's been below 40f in the city for about two weeks now, less in the mountains, and less-so in the shade. I saw Cam McCaul do this a few years back, and had some lath screws and miscellaneous supplies around myself.
Song: What is Time, by Elephant Revival (conveniently the same duration as the video).
So I gathered up the supplies:
- 2 pounds (roughly 450-500 with some to spare) #8x1/2" lath screws - they have a nice large panhead to spread the stress out across the casing of the tire.
- fresh paint pen(s)
- center punch sharpened to a nice, fine, point (sharp enough to easily pierce tread and casing plies)
- hammer (16oz is my preferred weight, one whack and it's done, not too heavy either)
- small drill/electric screwdriver - you don't need a lot of power, just something with a motor.
- 3" wide Gorilla Tape
- time, and patience.
- tires that you're willing to void any hope of warranty support on (the stiffer the casing the better, I chose single-ply WTB Dissent FR 2.5's because I had 'em, and I was going to add about a pound, they weighed in initially at around 800g.)
This is simply a walk-through of what I did, you and you alone are accountable for any alterations and failures (no matter how catastrophic) you may encounter as a result of your undergoing this process. WTB, Vimeo, myself, your tire company of choice, your bike shop, your hardware store, are all in no way responsible for this potentially failure-prone endeavor. Attempt at your own risk. That is all.
I chose the Dissent's because they had a simple, robust tread pattern that offered extra-wide triple-siped tread blocks that I felt would allow for greater support of the screws when placed centered in the wide blocks. They also weigh 800g+/- vs. the 1300g+/- that the Der Kaiser's that are sitting in the garage.
Basically you'll have to figure out where to place your screws, take your center-punch and tap it through the tread block, and locate where it protrudes on the inside of the casing, and mark a circle around the punch with your paint pen - this will show you where to drive your screws through from the inside-out when the time comes. Go around and repeat this process on every block you wish to put a screw in. It sucks. But you know what sucks more? Sliding on ice.
Once you've punched all of your holes, go through and drive your screws in. Follow that up by wrapping the interior of the tire with the Gorilla tape, to protect your tube from any unpleasant encounters with screw heads.
Mount your tires (carefully!) and have fun riding on the ice! Caution: these are awful on anything that's not ice or deep snow - you could cut the screws shorter to alleviate that if you wanted, though.