Marginal Gains or Just Marginally Cooler?

When you finally decide to transition from a road bike to a triathlon bike in your quest to conquer your next race goal, you are essentially buying speed. But the bike itself is only part of the equation.

Optimizing your riding position and equipment can deliver what many triathletes call “free speed.”

Now, here is where your wallet may disagree once it sees the prices. By free speed, I mean gains that come without needing to improve your fitness.

On the bike leg especially, performance is not only about fitness but about how efficiently you move through the air. Position and equipment both influence your coefficient of drag – better known as CdA – and small changes there can translate into meaningful gains over the course of a race.

Now let me be clear. If you decide to go shopping after reading this article, do not skip this week’s training. You still need to check off all the boxes.

But once those boxes are checked, there are plenty of upgrades worth debating – some that genuinely make you faster, and others that may look cool and sexy but may be less definitively worth the spend.

Tailor your Cockpit

When it comes to cockpit, individualization is key, and this likely makes it one of the most worthwhile upgrades to consider.

If we look beyond equipment alone to the broader issue of rider profile, aerodynamics experts will tell you that position accounts for roughly 80 percent of the resistance faced over the course of the bike leg on an average course (we spoke with wind tunnel experts about this). There are exceptions, such as courses with significant climbing, but this approximation generally holds true when riding in the time trial position.

This makes cockpit choice essential, both for ensuring comfort (particularly over long distances like the Ironman), and for reducing frontal profile, the most significant aerodynamic factor.

When shopping for a new cockpit, it is worth speaking with someone experienced in bike fitting first. Most cockpits offer extensive adjustability, but some may ultimately be better suited to your position needs than others. Choosing one with high sides can also help facilitate the shoulder tuck while riding, further reducing your exposure to the wind.

Find the Right Saddle

If, like me, you have had a love-hate relationship with saddles, selling more than you have kept and keeping a numbing agent nearby, then I have a saddle I want to introduce you to.

Saddles are one component that can often feel underwhelming on otherwise impressive bikes, and there is a reason for that. Most bike brands expect riders to replace the stock saddle with one that better suits their anatomy and riding style.

Like cockpits, individuality is key here. That is also why Wove is worth a look. The company offers a no-questions-asked 30-day return policy, meaning there is little risk in giving it a try if your current saddle is not working for you.

It has also become a favourite among many professional athletes and is worth considering if your current saddle is causing problems. As with cockpit upgrades, much of the value of a better saddle lies less in the component itself and more in what it enables: comfort and the ability to maintain an optimized position on the bike.

Upgrade Your Wheels

When it comes to equipment upgrades that deliver aerodynamic gains (i.e., looking beyond comfort and position), wheels sit at the top of the list.

Wheels are an expensive upgrade, but also one that can make a noticeable difference – once all the other boxes (like fitness!) are ticked off, as we said at the outset. (The bike’s engine is still the most important, and that engine is you.)

For strong riders near the front of the age-group field, a full disc wheel in the rear is one of the coolest and sexiest upgrades you can make that also delivers real gains. But it is important to understand that the benefits of a full disc increase significantly at higher speeds, making them less impactful for athletes not riding at the pointy end of the field. They can also reduce stability, particularly in windy conditions, so they are not recommended for newer or intermediate triathletes. (This crosswind instability is also why they are not permitted on courses like Kona, where it is considered a safety issue.)

Disc wheels aside, nearly every triathlete can benefit from a deep-section wheelset, with depth tailored to rider ability and course profile.

Marginal Gains or Just Marginally Cooler?

Let’s return to the opening question.

We focused on cockpits, saddles, and wheels above because, in our view, they represent the “big three.” The cockpit shapes your frontal profile and aerodynamic position. The saddle contributes to whether you can actually hold that position comfortably over long training rides and race day. And wheels, as standalone equipment, sit at the top of the list when it comes to measurable aerodynamic gains.

You may notice we did not discuss helmets, tri suits, or water bottle placement. That is simply because they are not bike upgrades per se – but if you are looking to take meaningful time off your bike split, they belong on the list as well.

Beyond that, the world of marginal gains quickly expands. From oversized pulley wheel systems designed with aerodynamics in mind to aero cranksets and more, there are always a few more watts that can theoretically be saved.

But for most age-group athletes, those upgrades sit outside what is necessary.

The biggest gains come in this order, and if you take one thing away from this article it is never forgetting the order:

1. Fitness
2. Position
3. Equipment

Happy riding.