Cog spacing is in between 9 and 10-speed hyperglide. A CUES/Linkglide 9-speed cassette is slightly narrower than a 8/9/10-speed hypergilde cassette, a CUES 10-speed cassette is slightly wider than an 8/9/10 HG cassette, and the CUES 11 speed is even wider. Not currently feeling motivated to dig out a bike with a Linkglide cassette to measure it, but since the base of the cog is thicker than normal, I'd expect the spacers to be at least as thin as 10sp HG, if not thinner.