The problem with “standover” is how it’s measured. It’s not a driven/specced dimension (in my case), it’s the result (largely) of headtube length, fork length, wheel diameter, seat tube length, top tube diameter, bb height.
It also varies how it’s measured. Bikecad (which I use for drafting stuff) shows standover measured in the centre point of the top of of the top tube.
Lots of companies show standover as the height of the top tube above the ground in line with the nose of the saddle.
Clearly, with a sloping top tube, the futher back you measure, the lower standover is. However, with massive differences between these two dimensions, unless you actually know what you’re comparing with what, arm chair analysis is totally worthless.
Even comparing bike to bike, with a steeply sloping top tube, hugely different numbers can come out and wildly throw people off line.
Head tube length and fork length, or even “stack” is a much better gauge of standover really. As people probably stand nearer the front of the bike rather than the back.
Anyhow. I just fired up bikecad over a flat white and smashed avocado on home made sourdough and got the following numbers out.
First are to centre of the top tube, second are to the “point on the top tube below the nose of the saddle” – and that’s a very arbitary position.
The large in question has a 120mm headtube, 130mm fork, and a 460mm seat tube. The top tube runs in a straight line ish.
I’ve equally found obsession over standover height quite hilarious, though actually less so as I’m probably guilty as pushing it back in the day when me and Zak were writing for MBUK. The old “make sure you can get your hand between your knackers and the top tube” might have worked a bit like “knee over pedal spindle” but as forks acquired suspension things changed. Plus nobody ever really stands over their bike like that. I certainly couldn’t stand over my YZ125 when I used to have one, and I used to ride that through forests a lot. Though it did get lower when it was stuck in a bog.
If you lose your footing and head towards your top tube, you’re smacking your balls whatever size frame you’ve got.
Numbers below.
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