Originally Posted by
Bike Jedi
Example 1: tire diameter (730mm/2) 365mm - 68 mm - 170 mm = 127 mm is bottom of pedal at lowest position to the surface.
Example 2: tie diameter (706mm/2) 353mm - 68 mm - 170 mm = 155 mm is bottom of pedal at lowest position to the surface.
Do I have all the correct?
So then the next question is...what is considered the "safe" zone before you have issues with pedal strike or you are just "too low" in general now?
I have no idea what the BB Height is considered to be a safe zone so to speak.
The answer in your example 2 should be 115mm. I assume that 155 was a typo.
In any event, 285mm of bottom bracket height should be plenty of clearance. My current gravel bike has a bottom bracket height of 279mm and I'm running 170 cranks.