It's protecting the inner-tube from rubbing against the screw heads of my DIY studs. Did the same thing last year and it worked great.
this post was submitted on 07 Mar 2026
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That's a great solution! I made a studded tire way back, but used some old inner tubes for protection instead.
My only regret was using regular screws, if I do it again I'd use stainless steel ones.
These are self-drilling and tapping ones which have hardened tips. These too wear off faster than they rust.