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How tall are you, what sort of riding are you looking to do, drop or flat bars?
If it helps, I'm 6ft and ride a 56 frame. 100mm -17 deg stem (so basically horizontal), drop bars. All day comfort riding position, not too high not too low. And that's v2.0 frame. v4 seem to have shorter reach but higher stack...
Also: https://bikeinsights.com/compare -
For what it's worth, I'm 6ft with a 86-87cm inseam and ride a 58cm V3.0 Wolverine. 90mm, -10° stem with 40mm of spacers. I was about to go for a 56, but LBS advised me to go for a 58 as it was intended more for touring than for racing. After two years of long days in the saddle it feels about the right choice. Also tried his 58 Double Cross at the moment, which helped to make my choice.
Concerning brakes, I use cable-actuated hydraulic Yokozuna Motoko. They work great, nice modulation, plenty of stopping power, easy to maintain. I recently mounted Juin Tech R1 that are identical for half the price on another bike (you have to get Yokozuna Reaction housing separately though).
After some advice on sizing if anyone can help... on paper I should be going for 56 but they seem to be quite long in the top tube department with a reach that’s not far off my road bike (which is a 57). My old cross bike had a 555 top tube with about a reach of 385 which was perfect... should I be looking at the 54 high has a shorter top tube and a reach of 391? The Double Cross looks great as well but the distro hasn’t got my size in. Plus anyone using cable disk brakes over hydraulic?