Garth, yep, I know stack and reach. To my weird brain though, if I know PBH, and I also know the goofy "[top-of-seatpost-at-comfy-height]__to__[center-of-bar-flats-at-comfy-stem-height]" measurement on a bike that I know fits me well, then I'm an instant away from seeing whether another bike can be configured to fit me well ... whether I have stork legs and t-rex arms, or stumpy legs and chimp arms. I don't think you can say the same for PBH-only bike sizing.
If you take that latter goofy measurement on a bike that fits you well, and cut a piece of string to that length, then 'overlay' it on a bike you're thinking about getting, you'd be able to see in an instant whether you can get a stem with the right reach (and height) -- plus a saddle with enough adjustment in the rails for proper setback -- for the new bike to fit you just as well as your existing bike. Assuming your PBH is also accommodated. I know, weird, and likely overkill if you're in the middle of the PBH range. But there are many who are in between PBH ranges, and/or don't have 'normal' upper/lower torso ratios. Tom On Tuesday, April 10, 2018 at 11:52:17 AM UTC-4, Garth wrote: > > Tom, The standard measurement these days by more and more frame makers is > called the reach, along with the stack. Riv has recently added these to > their geometry chart and can reveal how deceptive TT alone can be, let > alone any 1 certain measurement by itself. > > All of the numbers are meant as a guide of course, as every body is > unique, some more/less flexible and feel best in this or that > position...not what someone else tells them is best for them. > > There are many articles explaining it, here's one ... > https://velovoice.blogspot.com/2015/05/bike-sizing-stack-and-reach.html > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.