Hi- I recently moved to the US from the UK- and in doing so had to sell a lot of my bikes (including my tri bike). I rode a 58cm 'old' slice (2014 model)- and am looking to replace it now I am settled here. They have changed the sizing to a 57cm but have added a 60cm. The stack / reach of the 57 is very similar to the old bike- but the top tube looks really short.
Old slice 58cm measurements- Stack 54.8cm - Reach - 41.7cm Top tube- 56.5cm
New Slice 57cm measurements- Stack 54.7cm - Reach - 42cm Top tube- 54.4cm
New Slice 60cm measurements - Stack 56.7cm - Reach - 43.5cm Top Tube- 56.5cm.

See pic of fit on old slice below. Sorry- it's the only pic I have of me on the bike from my last race......

Thanks

B