Boardman CX Team - Which Size

Hi All
I am 5' 9.5" (176cm) tall with 32" inside leg. I fancy getting a Boardman CX Team but I am unsure about the sizing. My two road bikes both have a 54cm virtual Top Tube length but having looked at the CX sizing chart (shown below) I see that would be a small which doesn't seem right? Do you think a small or a medium would suit me better?
I am 5' 9.5" (176cm) tall with 32" inside leg. I fancy getting a Boardman CX Team but I am unsure about the sizing. My two road bikes both have a 54cm virtual Top Tube length but having looked at the CX sizing chart (shown below) I see that would be a small which doesn't seem right? Do you think a small or a medium would suit me better?

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Voodoo Bizango - 2014 - Dead - Hit by a car
Vitus Sentier VRS - 2017
When I can afford to get a CX as well, I'm expecting to get a small again.
I don't suppose there is anyone in the Kendal, Cumbria area that has a small or medium CX that I could try for size?
Cheers
viewtopic.php?f=40012&t=12796558&hilit=boardman+cx
might help you.
2013 Cannondale Caadx 1x10
2004 Giant TCR
Anyone in the South Lakes, North Lancashire, West Yorkshire area got a small or medium CX that I could try for size pls?
Its very frustrating that Halfords don't stock these then I could try one. Arrrghhhhh!
My only problem was a puncture after 20 miles, and this was on a tarmac cycle track (offroad)!
The original stem is 100mm
So its either a Medium CX Team or a different bike for me. I wish the Croix De Fer wasn't so heavy :-(
I'm 5' 9" with a 29" inside leg and have the Boardman Team CX bought online September last year. The nearest Halfords with a CX Team in stock was Leicester (30 miles away), their only bike was medium. Immediately I knew it was too big for my short legs as I literally could only just touch the floor on tip-toes with the seat post at the lowest position. As a punt (on the basis I could send it back) I bought the Halfords size small online. It has been great after swapping out the stock 100mm head stem for a 120mm head stem.
I seem to remember when I cross referenced the frame sizes between the Halfords and Boardman websites that the bike that Halfords are selling as small is actually listed as small-medium by Boardman (there was an extra-small). However as you have discovered Halfords seem to have stopped listing the small size. Is this in preparation for the UK launch of a revised bike?
Best regards
David
My height is 176 cm (appr. 5' 9"), inseam is 83 cm (32,5"). I have a Focus Izalco Team roadbike in medium size 54. I have tried to compare the geometry of the Focus and the Boardman only to find out, if I'm correct, that the Boardman mediums top tube with 110mm stem probably is to long for me, and the Boardman small may be too low and has to small handlebar and cranklength. Could you please help me choose correct size? For your information I rode a Trek Madone 4.9 until recently with top-tube of 560mm. That was to long for me so I had to change seatpost to one without setback and put on a 90mm stem. I don’t want that combination again as the bike felt too big for me.
Here's a wiew over the specs of my Izalco and the Boardmans, also compared with a Cannondale CAADX size 51 which felt really good, but don't have disc-brakes.
Sh!t because they have sold them all?
Boardman FS Pro