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I'm running 650B on my Bingham, and have a similar wheelset coming for my Litespeed (BTLOS WM-i22A, hookless, 22mm ID). The tires I've been using are Gravelking slicks, 38 and 42mm, tubeless. As the current 42mm pair on the Bingham are almost worn, I will probably go back to 38mm on that bike. I was curious about maybe trying the Litespeed with slightly wider tires, but preferring to stick with slicks rather than knobbier tires. What I seem to notice is that in the GK range, the 42mm weighs 350g and the 48 jumps up to 520g. Looking around at other brands, so far the only larger supple slick I have found is the Rene Herse Switchback Hill in 650Bx48. Are there other 650bx47/48 lightweight supple slicks (say, 400g-ish vs >500g)?
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