Been doing some measuring as i am confused as to way this Bike didn't leave me in agony after 32 miles this morning considering it's only a 21" frames measured from centre of crank to centre of pinch bolt.
What i have found is this (sorry about mixture of imperial and metric)
As above centre to centre is 21"
Along top tube from seat post front face to rear face of stem is 20"
Head tube is 10cm
Floor to centre of crank is 12"
Floor to bottom of headtube is 71cm
170 mm crank arms
Compared to This one
https://www.cyclechat.net/threads/holdsworth-criterium.298744/ which left me with severe back ache after 6 miles
Frame size 21"
Along top tube 20"
Head tube is 11cm
Floor to centre of crank 10 1/2"
Floor to bottom of headtube is 69cm
One of my other bikes that is used on a regular basis for 40+ miles rides
Frame size 22"
Head tube is 15cm
Along top tube 20 3/4"
Floor to bottom bracket 11"
Floor to bottom of headtube is 69 cm
170 mm crank arms
All of the above have a saddle height from top of saddle to floor of 39 1/2" with a bar height of 36" and a measurement of between 24 1/2" to 25 1/2" from front face of seat post to centre of bars through stem length which is my standard set of baseline measurements for any bike .