Originally Posted by
milkbaby
Just wondering... is there a good online resource explaining how stack and reach are used in bike fit and how to compare frames with these two measurements? When you look at stack and reach numbers of a frame, can you then ignore the seat tube angle (STA) and head tube angle (HTA) in looking at how well a frame might fit and how you balance on the bike between the wheels?
I was wondering because I was tooling around on competitive cyclist looking at the BH G5. I have a Jamis Xenith that I like the fit on, and the BH in XS is lower stack but similar reach to the Jamis, while the BH in S is similar stack but longer reach than the Jamis. Wondering which will be easier to set up similar in fit and will have the same balance between the wheels...
Your best effort is to post your existing frameset geometry here...along with a picture and saddle height. Next post the geometry of the frameset you are interested in. Simple trig will allow you to compare both. STA matters independent of stack and reach. Generally, the right choice of seat post setback and stem will allow you to compensate for any STA or HTA differences if stack and reach are in the same ball park.