This article exists as part of a series of eleven on tri bike fit, and describes the proper armrest drop for a triathlete; how to measure it; how to determine it.

This description of how to determine the proper tri bike riding hip angle is part of a process in which we describe the F.I.S.T. tri bike fitting process.

This is the second to last installment in our explanation of our F.I.S.T. tri bike fit process.

This is an article in a series describing our F.I.S.T. process for tri bike fitting, and in here we lay out the state of the art in tools for best practices.

This is the final installment of our series on our F.I.S.T. tri bike fit process, and takes the metrics we’ve generated and outputs your “best” bike.

It is not that often that a person needs a custom bike, but this is the most typical of circumstances when a custom is indicated.

It’s one thing to comprehend concepts like trail and steering axis and gyroscopic forces, another thing altogether to know with precision how a bicycle is going to handle once a design is executed in the form of a road-ready machine.

Our primer on stack & reach continues with the second chapter in the series. We examine how stack and reach enable you to understand how a given bike will, or will not, fit you.

Earlier in the decade I wrote an article on how bikes are sized, and the gist was that we ought to be looking at bikes from the point of view of head tubes and top tubes, and that’s it. — no more seat tube sizing.

In the final chapter of our stack and reach primer, we compare stack and reach with other ways of remaking sizing nomenclature.

I ride a 59cm bike or, if it’s a road race bike (as opposed to a tri bike) I’ll ride a 60cm bike. If it’s a Litespeed tri bike, I’ll ride 57cm, and so it goes. How are these bikes measured, and why do I ride different sizes depending on the manufacturer?