I will try to save people the frustration of having to buy all the hard drive adapters from Amazon. I want to love this one because it's typically Silca of the highest quality. The valve is excellent, even holding up to 175psi with minimal finger pressure. Anyone who regularly inflates disc bikes knows the one-handed inflation technique and combined with the Silca Superpista it's an easy one-man job. The best thing about this adapter is that it is a direct replacement for the Hiro to Superpista valve and can be swapped out in about 15 seconds. HOWEVER the valve is too big for any disc wheel with small valve hole. While aesthetically beautiful, I'm afraid it's functionally useless. However 3 stars for the best build quality, I just hooked it up to another pump and use it to inflate non-disc bikes because it's a pleasure to use. You need a smaller adapter for disc wheels with a small valve bore.
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