“The Tarmac SL8 isn’t just the fastest Tarmac ever - it’s the fastest race bike in the world.”
Specialized's philosophy behind the SL8 is that a modern road bike shouldn't be specialized in just one aspect, but rather find the perfect balance between aero, weight, and stiffness – making it faster everywhere: uphill, on flats, and in sprints.
Description
More about the S-Works Tarmac SL8
The Specialized S-Works Tarmac SL8 is designed as the ultimate all-round road bike. In this model, Specialized combines aerodynamics, low weight, and extreme stiffness in one platform. The result is a bike that climbs as efficiently as it accelerates on flat terrain, while remaining exceptionally stable at high speeds.
The frame utilizes a new generation of carbon lay-up and a highly optimized front-end design. The slimmer head tube and redesigned fork construction reduce air resistance, while keeping the overall frame weight extremely low. This creates a road bike that doesn't specialize in one terrain, but excels everywhere – from long mountain passes to fast criteriums.
A platform designed for pure performance
The geometry of the Tarmac SL8 focuses on maximum efficiency and direct power transfer. Every pedal stroke is directly converted into speed, while the bike remains comfortable enough for long rides.
Thanks to the perfect balance between stiffness and control, the bike feels responsive during accelerations and remains stable on fast descents and technical turns. This makes it a favorite platform for riders looking for a bike that can handle both races and long sportive rides.
Why the Tarmac SL8 is popular for custom builds
Many riders choose the S-Works Tarmac SL8 as the basis for a custom build because the frame offers an exceptionally high level of performance while also allowing for great freedom in component selection. The platform provides an ideal foundation to completely tailor a bike to riding style, weight, and personal preferences.
With a custom build, the bike can, for example, be assembled with a specific groupset, a high-end wheelset, or an ultralight cockpit. This creates a bike that not only technically perfectly matches the rider but is also visually completely unique.
For riders who want to get the most out of their equipment, the Tarmac SL8 is therefore more than just a road bike – it is a perfect starting point to build a dream bike entirely to their own specifications.
Get inspired
Discover some of our recent Tarmac SL8 builds
A selection of recent SL8 builds, fully assembled with high-quality components and tailored to the rider's wishes and riding style.
Perfect balance between aerodynamics and weight
The S-Works Tarmac SL8 is designed according to one philosophy: to be faster everywhere. The frame combines extremely low weight with highly optimized aerodynamic tube shapes. This allows the bike to climb exceptionally efficiently, while performing just as impressively on flat terrain and at high speed.
Direct power transfer and sharp handling
The S-Works carbon frame is designed for maximum stiffness around the bottom bracket and head tube. This efficiently converts every watt into speed, and the bike responds extremely directly to accelerations, sprints, and rapid changes of direction. This combination of stiffness and control gives riders a lot of confidence at high speeds.
Groups
Your bike's drivetrain largely determines its shifting feel, weight, and performance. That's why we only offer the best options on the market. You can choose from groupsets by Shimano, SRAM, or Campagnolo. Whether you prefer electronic precision, wireless technology, or the character of Italian shifting – we build your Tarmac SL8 exactly to your specifications.
The S-Works Tarmac SL8 was developed as the ultimate all-round racing bike: light, aerodynamic, and extremely efficient. This means the groupset must seamlessly match this character. It's not just about shifting, but about maximizing every watt you produce – from acceleration to top speed.
If you choose Shimano Dura-Ace Di2, you benefit from an unparalleled combination of precision, speed, and reliability. Shifting under full load is effortless, which is essential during sprints, attacks, and intense climbs.
With SRAM Red AXS, you opt for a completely wireless system with a clean and minimalist finish. The 12-speed setup and flexible gearing make it easy to maintain the perfect cadence, regardless of the terrain. Ideal for riders who want to combine technology and ease of use.
For those who value exclusivity and a unique shifting feel, Campagnolo is a distinctive choice.
The result is a Tarmac SL8 that not only performs exceptionally on paper but also feels perfect on the road – direct, efficient, and fully tailored to you as a rider.
Wheels
Wheel choice on the S-Works Tarmac SL8 is crucial to unleash the full potential of this all-round road bike. The frame is designed as a perfect balance between weight, stiffness, and aerodynamics – and the right wheelset amplifies precisely those characteristics.
Developed as a complete unit with Roval
The Tarmac SL8 was fundamentally developed in conjunction with Roval wheelsets. In many high-end builds and even in the professional peloton, the bike is ridden as standard with Roval Rapide CLX wheelsets, which underlines how well this combination works in practice.
This integration ensures that the frame and wheels are aerodynamically matched, resulting in maximum efficiency at high speeds.
The perfect balance: aero + lightweight
Roval wheelsets, such as the Rapide CLX (III), are known for their unique balance between aerodynamics and low weight. They combine deep rims with a relatively low total weight, allowing you to benefit from speed on the flats and immediate acceleration on climbs and sprints.
Why we recommend Roval
For the S-Works Tarmac SL8, we strongly recommend Roval wheelsets. Not only because of their performance, but because these wheels were specifically developed in line with Specialized's philosophy: maximum speed in real-world conditions.
Additional upgrades
In addition to the standard configuration, optional upgrades are also available for a custom build to further refine your bike. These upgrades can lead to better performance, lower weight, or an even more exclusive finish.
Ceramic bearings
A popular upgrade is the use of ceramic bearings in, for example, the bottom bracket, jockey wheels, or wheel hubs. Ceramic bearings have less friction than standard steel bearings, which can result in a smoother drivetrain and a small gain in efficiency and wattage.
High-end component upgrades
Many riders choose to further upgrade certain components, such as lighter cassettes, carbon bottle cages, titanium bolts, or high-performance jockey wheels. This can help reduce overall weight and give the bike an even more exclusive look.
Performance-oriented optimization
Some upgrades are specifically aimed at maximum performance. Examples include aerodynamic cockpit solutions, high-end wheelsets, or special coatings on components that reduce friction.
These upgrades are completely optional and are often chosen by riders who want to optimize their bike down to the smallest detail. When configuring your custom build, we are happy to advise you on which upgrades will truly make a difference for your riding style and goals.
Bike jewelry
We often refer to the final step in assembling a custom bike as bike jewelry. These are small, high-quality details that give your bike an extra exclusive look and elevate the finish to an even higher level.
Power meter integration
If you want to seriously analyze your performance, you can have The Bike Broker equip your bike with a power meter. This is one of the most valuable upgrades for training and performance improvement.
A power meter accurately measures how many watts you are pedaling. As a result, you no longer train by feel, but by objective data. This allows you to train more effectively, accurately track your progress, and manage your energy more efficiently during long rides or races.
Aesthetic upgrades
This can include titanium bolts, anodized spacers, premium derailleur pulleys, or special top caps. These subtle details give your bike a unique look and make the build completely personal.
Finish and exclusivity
Bike jewelry is primarily about the finishing touch. These are small components that refine the look of your bike and perfectly match the rest of your build.
Fully personalized
Because these parts are often available in different colors and materials, you can fine-tune the style of your bike down to the smallest details.
Bike jewelry is completely optional, but for many riders, this is the final step to truly making their custom build unique.
Total freedom in color and finish
The Tarmac SL8 can be built in a wide range of color schemes and finishes, allowing you to fully customize the bike to your personal style and preferences.
Discover what customers thought of our custom build service
Custom build reviews
Two weeks ago, I picked up my new SWORKS Tarmac SL7 from The Bike Broker. I was planning to just buy a frame and build it up myself with other parts from my previous bike. Because he asked early on about my plans for the frame (out of pure interest), he was able to think along fantastically and gave excellent advice. This gave me confidence in the seller. Ultimately, The Bike Broker also built my bike. Very satisfied with how this went. In between, he kept me well informed about the progress of building the bike through photos and relevant questions. I've already ridden the SL7 a few times; it's really a top-notch bike.
I had Ferry build my bike. A very pleasant and fun experience, resulting in my dream bike. Ferry takes ample time to discuss the options and is easily reachable for questions. The bike was assembled superbly, clearly demonstrating his knowledge and experience. Top-notch, highly recommended!
Can highly recommend Ferry. Had an initial conversation with him on a potential build and when I decided to pull the trigger he accommodated all my wishes and found me a frame and fully built bike within a month. Ended up with a customized build with mixed parts and he even took care of reselling some of the surplus stuff for me. Top bloke and great service, and always happy to chat about bikes when you drop by!
Ferry from the bike broker made the impossible possible. I was able to fully customize my dream bike thanks to Ferry's connections and knowledge!
Friendly and honest service, a hard-working top guy!
Looking for more information?
Frequently asked questions about our custom bike program
Start of the process
A custom build is a bicycle that is fully assembled to order. You choose the frame, groupset, wheelset, and all other components so that the bike perfectly matches your riding style and preferences.
The process usually starts with a non-committal consultation and advice in which we discuss your wishes, riding style, budget and how you intend to use the bike. Based on this, we propose an initial configuration.
No. Many customers start with a general idea of the type of bike they want. We then help you make the right choices.
Personal guidance for your custom bike
At The Bike Broker, building a custom bike is all about personal attention and customization. After all, building a high-end road bike is not a standard process, but a journey where your wishes, riding style, and ambitions are central. That's why we guide you step-by-step in configuring your ideal bike.
Listening to your wishes
The process always starts with a personal conversation. During this conversation, we discuss how you ride, what goals you have, and what is important to you in a bike. Do you primarily ride long tours, fast group rides, or races? Do you prefer maximum aerodynamics, a low weight, or a perfect balance between comfort and speed?Based on this information, we advise you on the ideal frame, for example, a high-performance model like the Colnago Y1Rs, and help you select the right components.
We take care of everything
Once the configuration is determined, we take care of the entire process for you. We arrange the ordering of all parts, check the compatibility of all components, and ensure that everything is perfectly matched. This way, you don't have to worry about technical details or complex choices.
Professional assembly
In our workshop, your bike is assembled with the utmost precision. Every component is carefully mounted and adjusted so that the bike performs optimally. From the assembly of the groupset to the perfect adjustment of brakes and shifting systems: everything is carried out with attention to detail.
Picking up your bike or having it shipped
When your custom bike is fully ready, you can pick it up personally from us. Many customers choose this option so they can immediately see, experience, and have any final adjustments made to their new bike.Would you prefer to have the bike delivered? Then we ensure that your bike is professionally packaged and safely shipped to you.
Thanks to The Bike Broker's personal guidance, you are assured of a custom build that is not only technically perfect but also precisely matches your riding style.
Custom vs. standard high-end bikes
A standard high-end bicycle comes in a fixed configuration. With a custom build, you and we assemble all the components yourself. This means the bike is fully tailored to your preferences and riding style.
A custom bike offers more freedom in component choice, better adaptation to the rider, and often a more unique appearance.
Not necessarily. In some cases, a custom build can even be more efficient, as you only choose the parts you truly want.
Frame & Sizing
We look at the type of bike (road, gravel, or mountain bike), your riding style, body type, and preferences. Based on this, we recommend the frame that fits best.
We do this based on your height, body proportions, and any existing bike fitting data.
Yes. If you have already had a bike fitting, we can use that data to build the bike perfectly to your specifications.
Construction process & delivery
Freedom in component choice
At The Bike Broker, you have complete freedom to configure your bike. If you opt for a custom build, the possibilities are virtually limitless. From groupset to wheelset and from cockpit to bearings: every component can be selected in consultation so that the bike perfectly matches your riding style, performance, and aesthetic preferences.
We guide you through this process and ensure that all selected components are technically perfectly matched.
Top-tier groupsets
The drivetrain largely determines the character of your bike. That's why we exclusively work with high-quality groupsets from renowned brands such as Shimano, SRAM, and Campagnolo.
Depending on your preference, we can equip your bike with the latest electronic shifting systems, wireless technology, or classic Italian precision. We are happy to advise you on the groupset that best suits your riding style and use.
Premium wheelsets
Wheels have a huge impact on the handling of a road bike. That's why we offer a wide selection of premium wheel brands such as ENVE, Princeton CarbonWorks, Lightweight, and Zipp.
Whether you're looking for ultra-light climbing wheels, aerodynamic deep-section wheels, or a versatile all-round wheelset: we help you choose the perfect option.
Cockpit, components, and finishing kit
You can also fully customize the cockpit and finishing kit to your liking. This way, we create a bike that not only performs perfectly but also perfectly fits your ergonomics and comfort.
Power meters and performance upgrades
If you want to accurately measure your performance, we can integrate various power meters. In addition, numerous upgrades are possible, such as high-end bearings, lighter carbon components, or aerodynamic optimizations.
Honest and expert advice
Although the possibilities are virtually unlimited, we believe it's important that every choice truly suits you. That's why we always provide honest and expert advice based on your wishes, riding style, and budget.
Together, we compile a configuration that is not only impressive on paper but, more importantly, feels perfect on the road. The result is a custom road bike that fully matches your ambitions and expectations.
This depends on the availability of parts. On average, the process takes a few weeks to a few months.
In many cases, yes, as long as parts have not yet been ordered or installed.
Yes. Every custom build is assembled with great precision and fully tuned in our workshop.
Yes. We ship bicycles nationally and internationally and ensure that they arrive at your location insured and professionally packed. Within the Netherlands, we always try to deliver the bicycle ourselves in person. Collection from our location in Dronten is of course also possible.
Get inspired
Discover some of our other recent high-end custom builds
From frame and wheelset to the smallest details in assembly and finishing. Check out some of our custom configurations.
Don't let your dream bike remain a dream
Contact
Do you have an idea for your dream bike, but would you like advice on the possibilities first? Leave your details and we will contact you without obligation. We are happy to discuss your wishes, riding style and budget and help you step by step in composing the perfect bike.
Perhaps you already know exactly what you want, or perhaps you are still exploring - we are happy to help you. Our custom build specialist will gladly provide you with free advice on frames, groupsets, wheelsets and all the details that make a custom build unique.
Feel free to contact us to discuss the possibilities. We are happy to help you and provide honest advice on the best configuration for your dream bike.
Phone: +31 85 060 9203
E-mail: info@thebikebroker.nl
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