High or medium racer sought

2 equally large wheels, present the problem of being able to reach the ground whilst seated, without having to sit upright every time, because the exact moment that You need to stop, can’t always be accurately judged .

Also I might suggest that a ‘high racer would be more problematic at getting up stairs, especially if there are landings / doorways to contend with. 

Apart from the 2 Kingcycles on here, there is a 26” ‘ 'ORCA' high racer with rear suspension, and a dual 20” Challange mistral, ( quite a fast bike I’ve heard), on e bay. I lived in a first floor flat for years, and the stairs had a landing, with a door at 90 deg, then another long landing at 90 deg again. I used to carry my MTB up there and down every day, and it was awkward, especially as trying to take the bike down was harder than taking it up, and it also meant turning the bike around to come down front first. Depending on your staircase, the smaller the better, I would say.  Best of luck.