Quote:
Originally Posted by unterhausen
This is why some people are going with stack and reach, but nobody has gotten used to it yet.
|
I agree that Stack and Reach makes the most sense - they are direct measurements of the most pertinent dimensions. But Stack and Reach can be confusing for some. Firstly, it isn't a single value. "Small", "Medium", and "Large" are easy to understand, even if you have extended sizes like "Extra Small" or "Medium-Large". If the Stack/Reach concept were applied to T-shirt sizing, you'd have to figure out if you were a Short/Wide or a Tall/Narrow.
But a more serious source of confusion is that Stack and Reach aren't truly independent. If you change head tube length while keeping all other dimensions/angles the same, Reach decreases by about 30% of the Stack increase. This means that, for example, a frame with a Stack/Reach of 550mm/380mm will fit exactly the same as frame with Stack/Reach of 530mm/386mm, if you add 20mm of steerer spacers or a taller stem on the 2nd frame (even though the 2nd frame looks like it should be "longer").