The 2014 Dimond builds on superbike designs from the golden age of cycling innovation, and takes a focused approach at optimizing rider, frame, and component aerodynamics. The end result is a bicycle that allows you to go faster than on any other bike – a very simple and bold claim.

While technically a beam-style bicycle design, the operation and adjustment of the bike is most similar to conventional bicycles. Rider fit was a key consideration in the design of the bike. Effective seat tube angles between 77°-82° are attainable, while moderate headtube stack and reach dimensions sustain riders in a powerful and aerodynamic position. The Dimond achieves its miniscule aerodynamic stature using highly integrated frame members whose truncated airfoil tube shapes are optimized for cycling speeds. A detachable top tube makes for convenient packing and travel, while internal cable routing allows compatibility with either mechanical or electronic drivetrains. The frame is composed entirely of aerospace grade unidirectional pre-preg carbon fiber from manufacturers in the USA.


Data is only as powerful as it is reliable, and we don’t throw around the superlative phrase “world's fastest bike” lightly. It’s a scrum to get to the top of the pile of claims made by competitors, but the data are the data. The Dimond tested faster at every yaw angle than either of its two closest competitors.

The advantages of the Dimond frame are real. Wind tunnel data was used to derive predicted time savings over an Ironman-distance bike course. The drag differences between each bike were translated into changes in speed given a constant power output, which were then used to calculate the differences in time needed to complete a 112-mile course. The average speed of the baseline bike (Dimond) was set at 25mph.

Ironman course time savings over our closest competitors:

Average Wind Yaw Cervélo P5-3 Specialized Shiv
1min 46sec 4min 46sec
2min 30sec 4min 56sec
10° 1min 21sec 4min 13sec
15° 4min 31sec 3min 50sec

Read the full wind tunnel report here.


The vision of Dimond bikes was shared between TJ Tollakson and Dave Morse in 2008 when they first met to collaborate on a bicycle hydration system. Working late one night, the idea of making a triathlon superbike was tossed on the table. Though the thought was only briefly entertained, it was filed deep in the subconscious of each inventor.

In 2010 TJ began racing Ironman events on a Zipp 2001 frame. The Zipp 2001, a product of the golden era of superbike designs, was still proving to be the fastest triathlon bicycle in recent wind tunnel tests even though the bike went out of production 13 years prior. By 2012 TJ was convinced of the merit of beam bikes as an optimal design. He embarked down the path of creating the Dimond bike brand and immediately turned to his old friend Dave Morse for consult.

The first prototypes took many long nights in the shop, but TJ finally started producing renditions of his own superbike. In May of 2013, Dave joined the company full-time as the Director of Engineering. The design of the Dimond was refined again and renovation began in an 11,000 sq ft warehouse to create a state-of-the-art carbon fiber manufacturing facility. By November 2013, the Dimond superbike was released to the public with wind tunnel data confirming its place at the top of the list of “fastest bikes”. The Dimond Bike has been long awaited, but the final result is nothing less than the fastest triathlon bike in the world.

It takes heat, pressure and carbon to make a diamond gemstone. Similarly, it takes heat, pressure, and carbon to create the Dimond bicycle. While the physical similarities between the two may end there, one thing is certain; with a Dimond bike, you can be brilliant under pressure.


Every Dimond starts as plies of unidirectional polyacrylonitrile-based carbon fiber, pre-impregnated with catalyzed polyepoxide resin. We just call it “pre-preg”. The resin is a precise and complex mixture of petroleum derived short chain epoxide polymers, catalytic hardening agents, and tougheners. At room temperature the resin in our pre-preg is tacky and flexible. This allows us to laminate plies together, placing them on top of one another at their prescribed fiber orientation.

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The highly-aligned carbon fibers in the pre-preg give an anisotropic property to each ply – pull parallel to the fibers and the ply is very strong, but pull perpendicularly and the fibers will separate. This property is quite similar to wood, which is also a composite material composed of strong cellulose and sticky lignin to act as a binder. Like wood, each ply of unidirectional pre-preg has a grain that is visibly defined by the run of the fibers. Both wood and carbon composites take advantage of this directionality to make structures that are quite strong and light. By laminating plies of pre-preg oriented at a precise angle relative to each other, it is possible to alter the global properties of a stack of plies to best accommodate the loads predicted for the intended use of the final carbon part.

We stack plies of pre-preg in orientations and shapes that correspond to the load paths for each part of our frames. The thickness of each ply stack varies depending on where it goes on the frame. Some areas are just a few plies of pre-preg, less than one millimeter thin, while other areas are almost ten times that. At this point of the operation, each ply stack feels and acts a little like a soft and sticky fruit rollup – the resin has not gone through its polymerization reactions and is still tacky and flexible.

The highly organized ply stacks are cut into many small two-dimensional patterns and all the pieces are then arranged and folded into a mold like a high-tech piece of origami. The mold is an exact negative copy of the final carbon part, similar to how a waffle iron is the negative shape of the waffle. Our molds get heated with the carbon ply stacks inside to begin curing the epoxy resin. During this process, the resin goes through several transformations. The once tacky resin turns into a viscous liquid that, for a few minutes, is able to flow and fully wet out all the carbon fibers. Soon, however, the resin reaches a critical temperature and the epoxide polymers begin to cross-link in an exothermic reaction. This cross-linking continues until the resin hardens into a stable thermoset plastic, fixing the shape of the part and fibers into an extremely high-performance material. Our Dimond frame parts are then de-molded and passed through several stages of processing and inspection before getting painted and assembled into one hell of a ride.


Every Dimond frame is designed and manufactured in Des Moines, Iowa. So what?

On top of the pride we carry for each product made under our roof lies a strategic reason for why we design and manufacture entirely in-house. Our “one-roof” approach is expensive, carries a lot of financial risk, and finding people who have the right expertise is difficult. Why go through the trouble?

Innovation. Speed. Quality. Teamwork.

Our vertical integration allows us to more easily develop new manufacturing technologies, which are key to offering cutting-edge performance in our revolutionary product designs. We can implement new design or manufacturing ideas in a heartbeat, allowing for an extremely low threshold for product concept validation or factory process improvements. Locating our engineering staff under the same roof as manufacturing fosters a proactive, problem-solving team that ensures every single product we ship meets our exacting quality standards. Our sales team, also located in the same building, is highly educated and instantaneously abreast with the latest product designs and production updates – when our customers call they get to talk to someone who is directly connected to everything and everyone in the company.

"It’s really easy to get up for work in the morning when you believe so wholeheartedly in the product that you’re making."

-Dave Morse, Director of Engineering

All of the advantages we gain from in-house design and manufacturing benefits you, the consumer, by offering an unrivaled product experience. Revolutionary products, flawless production quality, peerless customer support. Made in USA.