Are you sure about those numbers? Only 5 mm change in reach between the sizes, but 16 mm change in stack?
My feeling is, 5 mm change in reach is nothing much, easily compensated with a different stem. 16 mm change in stack could matter more, if you're trying to slam the stem (position the stem as low as possible).
Yep prety sure those numbers are correct.
Anyway, this is the geometry chart and I'm torn between the 52 en 54. My current set-up is stack: 534.5mm (so 2.5mm and 18.5mm differenece instead of the reported 1.5mm and 17.5mm) and reach: 388.
