While it's best to buy through fitting a bike in store, it's not always possible (discussed here).
On some websites, the stand-over height of a bike may not be listed as part of the specifications.
However, simple geometry would dictate that there must be a way to calculate the stand-over height from knowing the frameset's tube lengths and angles, as well as the wheel diameter alone.
Or is there more to consider?
For example, taking the Genesis Day One Disc in the 60 cm variant as an example:
- Seat tube (centre-top): 600mm
- Effective Top Tube: 575mm
- Head Tube: 185mm
- Head Angle: 71.5°
- Seat Angle: 74°
- Chain Stay: 415mm
BB Drop: 64mm
Stem Length: 110mm
H/Bar Width: 44cm
That's more or less OK, but what size are the wheels?
- Hubs: KT-SY1F / KT-MX7R 6-Bolt Disc
- Rims: Alex XD-Lite Disc 32H
- Tires: Continental Cyclocross Race 35c (wire)
I would like to know the standover in order to determine clearance between my crotch and the top tube.