Please note the typo in the subject heading - I am referring to PBH (pubic bone height) and not BPH (benign prostatic hypertrophy) which is another, separate factor of potential interest to bike riding men of a certain age…

Sent from my Atari 400

On Dec 12, 2022, at 9:49 AM, Jay Lonner <jay.lon...@gmail.com> wrote:

I just took delivery of a new (non-Riv) bike and am dialing in the fit. I’m a little worried that the frame is too big for me, since I only have maybe 2” standover, which seems tight for a gravel bike.

So I went out and measured the saddle height on my Hunq (which is a size 62). It came in at about 75cm. This gives me a solid fistful of seatpost. Then I remeasured my PBH, which is 93-94 cm depending on hard I pull. For reference, here’s the relevant page from HQ:

https://www.rivbike.com/pages/pubic-bone-height-how-to-measure-your-pbh

This suggests that based on my  PBH my saddle height should be closer to 83 cm – an 8cm discrepancy. Before riding in this morning I raised my saddle height to 79 cm, basically splitting the difference. It felt weird, which of course it would after so many years at 75cm. But I made it in and my feet were in full contact with the pedals without any tippytoe maneuvers. So I guess I’ve been doing it wrong this whole time? Kind of embarrassing. Even so, according to the Riv method my saddle height is still ~4cm lower than my PBH would suggest. 

So I guess I’m wondering about alternative ways of determining saddle height somewhat objectively, and/or whether I should now be looking at other variables such as a fore-aft saddle positioning, saddle angle, and even saddle type (currently a B68, slammed back as far as it can go on a S83, with the nose pitched up ~10 degrees or so). Other relevant factors might be crank arm length (175mm), pedal height (Pedaling Innovations platform pedals), and shoes (Chuck Taylors, typically). Looking for the optimum balance of comfort, efficiency, and protecting my perineum.

Jay Lonner
Bellingham, WA




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