really? i did the calculation, i forget the maths..but i said i need 21.5", i figured this with the seat pushed up a bit would be fine but have obviously run into the bars are now too low problem. this bike wasnt expensive i only paid £130 its a claud butler san remo 700 sprayed black cos the original job was union jack ridiculous! hence me thinking i could put parts onto it to make it suitable for me.