I’ve been spending a lot of time both thinking about and riding bikes in the past few months. I’m currently riding a 650b setup. I’ve been curious to at-a-glance see the closest equivalent rim/tire combos between 650b and 700c. Despite finding an abundance of opinions about how rad 650b is and plenty of data about rim/tire/wheel sizes, I couldn’t find an easy “this-to-that” conversion table. I pulled in the data from bikecalc.com and arranged it to make it a bit easier to see equivalent rim/tire combos between the two wheel sizes.

Please note that this chart is only considering the resulting outer diameter of the rim/tire combo in question. The width clearance of your particular bike frame is only possibly to evaluate on a frame-by-frame basis.