Purchased Dominator MTB shoes w/ orange lug sole. these were my race shoes with very few miles on them. the orange soles simply disintegrated. wondering if this was a common problem? simply cannot explain how the lug compound just crumbles. certainly expected better from Sidi. I have purchased 5 pairs of Sidis over the years and this is the first instance of total product failure.
The Dominators you are describing have been discontinued for over ten years, partially due to this issue. The integrated polyurethane lug sole did not age well and would crumble over time like you are experiencing. Because the lug sole was integrated into the main sole it was not something that could be serviced. Instead SIDI stated to produce it’s MTB shoes with one of two different methods.
The first was to use a much harder set of permanent sole lugs. These traded grip and traction for a longer overall lifespan. You can see these soles in our modern Dominators as well as the other entry to mid level MTB shoes.
The second method was to continue using the polyurethane sole lugs but rather than having them mounted directly to the sole, they would be mounted to a nylon plate which fit into the sole of the shoe making them easily replaceable when they were worn down with usage or degraded over time.
Between these two production methods SIDI has effectively eliminated this as an issue from our modern line of shoes. But there are of course some pairs of older shoes sitting on store shelves or in closets around the world that despite their lack of use will suffer from this problem.
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