Mon Jun 23 2008: The F.I.S.T. tri bike geometry calculator is open for beta testing. Your fitter plunks numbers into our online engine and, poof, your custom bike geometry!

Wed Feb 19 2003: 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 ...

Wed Feb 19 2003: In the final chapter of our stack and reach primer, we compare stack and reach with other ways of remaking sizing nomenclature.

Wed Feb 19 2003: 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.

Thu Sep 13 2007: This is article number five out of eleven describing our F.I.S.T. Tri bike fit process.

Thu Sep 13 2007: Slowtwitch means different things to different athletes, but tri bike fit is the thing we're probably best known for. Herein is a description of our process for tri bike fit.

Tue Jul 15 2008: “Why am I uncomfortable on my bike?” Do you have occasion to ask this? We endeavor to find the answer in our series on the subject. Our first installment focused on contact points. This is ...

Thu Feb 08 2018: Slowtwitch forum members too often (justifiably) complain about bad results from bike fit sessions. As of 2018 here is what you should expect.

Thu Feb 09 2012: This road bike fit protocol is designed to work with fit bikes that adjust horizontally and vertically; to take advantage of stack and reach data matching; and to consider all the positions common to ...

Wed Oct 20 2010: A popular feature each year is a look at the top 15 Pros in Kona on their bikes, and here we go again. This is your chance to check out the gear of these athletes and the positions they hold while ...

Sat Oct 01 2022: With the 2022 IRONMAN World Championships almost upon us we look back at the Top Ironman Hawaii Finishers Archive with the top overall finishers dating all the way back to 1978.

Sat Oct 20 2007: We have uploaded a gallery of images of the top 10 Pro women aboard their bikes.

Sat Oct 18 2008: While we started to look closer at the bikes of the top finishers at Ironman Hawaii last year already, this year we also wanted to know more about their running shoes.

Sun Oct 19 2008: Chrissie Wellington and Sandra Wallenhorst ran sub 3 hours at the 2008 Ford Ironman World Championships and finished 1st and 3rd respectively. We looked closer at the shoes which carried them and ...

Sat Oct 20 2007: Here is a closer look at the bikes on which the top 10 male Pros competed in Kona.

Fri Jan 23 2009: If you're a 180 pound triathlete, a 6 ounce shoe is probably out. But if you're a 145 pounder with a good footfall, an 8 ounce shoe might be in. Here's our first round of overviews of 09's racing ...

Fri Feb 05 2010: We write about running footwear here a lot. It seemed appropriate to tell you how to read and interpret these articles. What is a "pronator?" What is a "last?" What is an "outsole," and a "medial ...

Wed Dec 28 2011: Are there differences between how you sit, and what you do, aboard a saddle on a road bike versus a tri bike? Yes. Two differences, and they're big. What makes this possible? Handlebar design.

Fri Dec 30 2011: Split nose saddles: I separate these into two categories, those that appear like standard saddles, creating a fjord out of what in other saddles is a lake; versus wide split-nosed saddles like the ...

Mon Aug 06 2012: We take an in-depth look at the wheel offerings from Shimano for 2012, along with a preview of soon-to-be-released 2013 product. Has the Japanese giant finally gone aero?

Sat Jun 15 2013: We take a close look at the full line of 2013 Shimano Dura Ace 9000-series carbon wheels. They range from 24mm to 75mm deep, and are available in clincher or tubular.

Mon Sep 13 2010: The Plasma 2 frame was unobtainable during 2010 for a price below $5000. For 2011, this high quality frameset can be had in a bike selling complete, with a very nice gruppo, for $3300. Today we ...

Sat Sep 18 2010: This bike is further evidence that the most hotly contested price category in tri bike land is the $3300 to $3700 range. The big boys—Trek, Cervelo, Felt, Cannondale, Scott—have gone all-in here. ...

Wed Dec 26 2007: How power propels a bike: This is the second of two introductory articles preparing for a year-long series on training with power.

Thu Dec 08 2016: The bane of the untutored swimmer is stalling in the water. Does this describe you? Here are two tests to unearth this problem, and the solutions if you're among the afflicted.