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Triathlon / TT Bikes For Sale - New & Used

Shop certified pre-owned used TT bikes at TPC - The Pro's Closet. Browse popular TT brands like Trek, Cervelo, Giant and more for the best mountain, road, and gravel bikes. 

TPC - The Pro's Closet is the leader in buying and selling new and Certified Pre-Owned used bikes. With over 150,000+ customers served and 45,000 bikes sold. Talk to an expert Ride Guide today to find the right triathlon / TT bike for you.

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When you want to turn yourself into a road-dominating, pedaling missile, you want a triathlon bike. Tri’ bikes are designed to reduce aerodynamic drag. They do this by sculpting the vehicle first to hide from the wind as much as possible, and then putting the rider in a slippery position, reducing frontal area to the minimum, thanks to a forward position and triathlon handlebars. 

Wheels are an essential part of the wind-cheating equation. The deeper the rim depth the easier it is to pedal the bike at speed (and the trickier to pilot in crosswinds). Some come with shallow aluminum rims, others with deep carbon-fiber rims. Aluminum are typically seen as training wheels that can be raced, carbon as race wheels that can be trained on. 

There are three flavors of rim: clincher, tubeless, and tubular. Tubulars are usually seen as “race only.” Clinchers and tubeless can be both raced and trained. Clinchers have a tube inside, while tubeless do not, but tubeless can be run tubed, though not the other way around. 

The Difference Between Time Trial & Triathlon Bikes

Triathlon Bike Sizing

Choosing the correct bike size is important, the right fit will ensure you get the most out of your TT/Triathlon bike so you can put the power down when it matters. Correct sizing will also make for a more comfortable ride to keep you going strong. 

Triathlon Bike Size Chart

Rider Height (in)

Rider Height (cm)

Frame Size

Frame Size (cm)

4'10" - 5'3"148-160cmX-Small (XS)47-50cm
5'3" - 5'6"160-168cmSmall (S)51-53cm
5'6" - 5'9"168-175cmMedium (M)54-55cm
5'9" - 6'0"175-183cmLarge (L)56-58cm
6'0" - 6'3"183-191cmX-Large (XL)58-60cm
6'3" - 6'6"191-198cmXX-Large (XXL)61-63cm

Used Triathlon Bikes For Sale

The Pro’s Closet has a deep collection of used triathlon and tt bikes for sale, everything from beginner triathlon bikes to full-on Ironman winning bikes. 

One of the great things about special-purpose rides is that they often treated well by their stewards. That is to write most of the previous owners of these bikes have other bikes as well and probably spent more time on their road bikes outdoors than on their tri’ bikes. 

As a result, these bikes probably haven’t seen much in the way of bad weather. Tri’ bikes are rarely out in winter months and rarely crashed. 

Best Triathlon Bikes 

The best triathlon bikes don’t take a single shape. Sometimes they’re relatively traditional, like Trek and Specialized triathlon bikes. Sometimes they’re radical, like Ventum bikes. Quintana Roo and Cervélo largely try to split the difference. Cervélo’s P-Series, including the P2 and P3 mix radical shaping with a double-diamond design. 

Time Trial Bikes 

There might be some confusion in names. Not all triathlon bikes are time trial bikes and not all time trial bikes are tri’ bikes. While they look really similar and are usually interchangeable, there are some design constraints put on international-level time trial bike races. 

If you are not racing a national championship or internationally-sanctioned Junior, U23, or Elite race, you probably don’t need to have your bike conform to the UCI design standards of a time trial bike, but you probably should remove the wind-cheating storage boxes and bags if your bike comes with them.

Every CPO bike is cleaned, tuned and tested at our Colorado headquarters.  Sell Your Gear today and we can make an offer for your bike, frame, or wheelset within two business days and help you avoid the frustration and renegotiation of the secondary market.

How to Choose a Triathlon Bike: Buying Dos and Don'ts - From TPC's Magazine

Triathlon bikes (also called tri bikes) are made specifically for triathlon racing where the bike leg can be anywhere from 12 miles to 112 miles. Tri bikes often have a steeper seat tube angle, pushing the hips forward on the ride and saving the hamstrings for the run. With the seat tube closer to vertical, the rider's hips are over the crankset, which engages the quadriceps for power. Read the full article here.

11 Best Triathlon Bike Accessories - From TPC's Magazine

There’s no way around it, triathlon requires a lot of stuff. If you’re new to triathlon, you don’t necessarily need to shell out for everything right away, but there are some things you can’t do without. Like a helmet. I picked 13 of my favorite bike things for triathlon — some of them totally necessary, and others that just make us feel like pros. Read the full article here.

View our related product listings pages: TT bikes on sale

Visit us at our Louisville, Colorado Bike Store to see our full triathlon / TT bike collection in person.