Hello, I'm looking at getting a Canyon Ultimate CF SL 9.0 (best value for money in terms of price, groupset etc) but their frame sizes are very arbitrary. My current frame size is 54 and ideally I'd like a 55 even though that size is not common. Canyon are telling me I'd have to get a small: frame size 53, the next size up being a 56 (large), which would be too big for me. It's either of those two sizes, nothing in between...

They seemed very nonplussed when I questioned their frame sizes and were adamant 53 would be fine for me. Has anyone had to deal with something like this?

Any info on this would be great
thanks