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Current lead times: Unpainted frame: 7 weeks. Painted frame: 9 weeks.

U.S. Built Custom Bicycles in Titanium and Titanium-Carbon Mix


Special Edition Bike Model: Evergreen SL ERSA Titanium

ERSA stands for: Endurance // Race // Smooth // Airy
evergreen-ersa-gravel-in-red-clay

Why choose Seven’s ERSA Evergreen Special Edition?

The ERSA design and geometry is optimized for both endurance gravel adventure racing and dirt road racing. The frame design is fast and efficient. ERSA also means this is a double wheel design optimized for 700c and 650b wheels with BIG tires. ERSA is a purpose specific bike that includes our most current technology and upgrades.

The Evergreen model designates the bike has disc brakes, dropped handlebars, and works with a range of tire sizes for many types of terrain. Seven’s propretary titanium material choice provides the bike with toughness, lightness, and a very smooth ride. The "SL" tubeset designation attests we’ve tailored the titanium to be a balance of lightweight, durability, and endurance riding comfort.

The ERSA project is the culmination of a year-long R&D challenge to design a bike that excels at Dirty Kanza and Battenkill. Very different races with very different bike needs. The former is a long body-exhausting endurance race, and the latter is a hilly speed-centric event. Designing one bike that can compettive in both races was a worthy challenge. Having succeeded in the task, we now offer the ERSA to everyone.

Seven’s ERSA Framebuilders: John Tomai & Stef Adams

What’s more important than having smart capable humans building your bike? Not much, really. Therefore, for the ERSA project we’ve brought together two of our most experienced builders. Together, Stef and John have been building Sevens for nearly 30-years. They’ve worked on more than 10,000 custom frames in that time.

Frame Features & Upgrades

We’ve packed just about every innovation we offer into the ERSA. Click on links to learn details of each design element.

Element Specifications & Details
Frame Model: Evergreen
Material: Titanium
Tubeset: SL double-butted
Fork Seven’s proprietary Matador Carbon 765 Endurance fork. Works with 700c and 650b wheelsets.
Frame Upgrades

Parts Kit:

SRAM Force-Eagle eTap AXS HRD electronic shifting

This is our favorite new-tech kit. It’s so new that we had to build this kit from two of SRAMS offerings: The new Force AXS road group and their innovative mountain bike Eagle parts. You won’t find this kit on any stock bike. It’s that progressive. And that good.

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When flawless shifting, lightweight, and innovation are important to you, our Force-Eagle — Seven "Forgle"™:) — AXS 1x setup can’t be beat. Our Expedition Team has put this gruppo through everything and come out the other side without incident. We trust this setup for the longest of the one-day adventures.

Component Specifications
Shifters Force AXS eTap 1x electronic
Derrailleurs XX1 Eagle AXS eTap electronic, rear only, 12-speed
Brakes Force HydroHC hydraulic with Centerline XR rotors: 160 mm front & 140 mm rear
Crankset Force AXS 1x 44t chainring, crankarm length is size specific
Bottom Bracket SRAM DUB T47, 68 mm width
Cassette GX Eagle 10-50t, 12-speed, for XD Driver
Chain Force AXS 12-speed, Flattop, silver, with Quick Link

If you want something that’s not shown here, contact us. We can probably accomodate.

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Lots of other gravel models available

If this specific bike doesn’t seem to be your perfect match, check out the rest of our race gravel bikes. Or, review our full line of gravel models. We’re confident we’ll have the right bike for you. Questions? Contact us. We’re here to help you find your perfect bike.

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Choose Your Buildout and Support Package Details

The “support package” is everything that’s not part of the “8-piece kit” described above. These are all great finishing kits we’ve hand chosen to confirm that the parts are compatible and work seamlessly together regardless of the kit spec.

Size Specific & Gender Specific: We match components to the size of your bike, including crankarm length, handlebar width, stem length, and stem angle. We’ll provide you size recommendations.

If you want something that’s not shown here, contact us. We can probably accomodate.

Archetype Build

Tough, utility, low replacement parts cost, best value.

This is our best value buildout. Every single component is handpicked from well known brands that offer the highest quality components. Whether you’re racing every week or doing all day endurance riding, this build will keep you riding. Very durable. Not the lightest.

Component Specifications
Fork Seven Proprietary Matador 765 Endurance Carbon. Design details here.
Headset Cane Creek 40, black
Wheelset 700c Mavic Allroad aluminum, with 160 mm rotors front & 140 mm rear
Tires 700c x 40 mm Donnelly X’Plor MSO, tubeless ready, folding, 60 tpi, 532 grams each. Wheels ship with tubes installed.
Handlebar Fizik Cryano R5 Chameleon aluminum, 31.8 mm clamp diameter, width is rider specific
Bar Tape Fizik Tempo, 2 mm thick, Microtek, classic, black
Stem Fizik Cryano R5 aluminum, 31.8 mm clamp diameter, length & angle is rider specific
Seat post Fizik Cryano R5 aluminum, 330 mm length, 27.2 mm diameter
Saddle Men’s: Prologo Kappa Evo, black
Women’s: Prologo Kappa Evo Dea, black
Headset Spacers 3x 1.0 cm aluminum, black
Pedals Not included

Complete bike price: $8,995

Place a deposit today to get your own special edition Evergreen SL ERSA Titanium Archetype Build within four weeks.

ERSA Archetype Build Deposit

Factory Build

Light & durable, utility, set it and forget it.

What we ride. Seven’s favorite parts. A balance of light and durable. An odd mix, just like us.

Upgrades from the Archetype Build are bold.

Component Specifications
Fork Seven Proprietary Matador 765 Endurance Carbon. Design details here.
Headset Chris King, black
Wheelset 700c Industry Nine AR25 TL, aluminum, with 160 mm rotors front & 140 mm rear
Tires 700c x 40 mm Donnelly X’Plor MSO, tubeless ready, folding, 60 tpi, 532 grams each. Wheels ship with tubes installed.
Handlebar Fizik Cryano R5 Chameleon aluminum, 31.8 mm clamp diameter, width is rider specific
Bar Tape Fizik Tempo, 2 mm thick, Microtek, classic, black
Stem Fizik Cryano R5 aluminum, 31.8 mm clamp diameter, length & angle is rider specific
Seat post Fizik Cryano R5 aluminum, 330 mm length, 27.2 mm diameter
Saddle Men’s: Fizik Antares R3, K:ium rails, regular width, black
Women’s: Fizik Antares Open R3, K:ium rails, regular width, black
Headset Spacers 3x 1.0 cm aluminum, black
Pedals Not included

Complete bike price: $9,995

Place a deposit today to get your own special edition Evergreen SL ERSA Titanium Factory Build within four weeks.

ERSA Factory Build Deposit

Team Edition Build

Race-tuned, lightweight, performance above all.

What Seven’s Expedition Race Team rides. In all conditions, every day. Very light with no sacrifice in durability.

Upgrades from the Factory Build are bold.

Component Specifications
Fork Seven Proprietary Matador 765 Endurance Carbon. Design details here.
Headset Chris King, black
Wheelset 700c Industry Nine UL235 TRA, aluminum, with 160 mm rotors front & 140 mm rear
Tires 700c x 38 mm Maxxis Rambler, tubeless ready, folding, 120 tpi, 382 grams each. Wheels ship with tubes installed.
Handlebar Fizik Cryano R3 Chameleon aluminum, 31.8 mm clamp diameter, width is rider specific
Bar Tape Fizik Tempo, 2 mm thick, Microtek, classic, black
Stem Fizik Cryano R1 aluminum, 31.8 mm clamp diameter, length & angle is rider specific
Seat post Seven titanium, custom length, 27.2 mm diameter
Saddle Men’s: Fizik Antares R3, K:ium rails, regular width, black
Women’s: Fizik Antares Open R3, K:ium rails, regular width, black
Headset Spacers 3x 1.0 cm aluminum, black
Pedals Not included

Complete bike price: $10,895

Place a deposit today to get your own special edition Evergreen SL ERSA Titanium Team Build within four weeks.

ERSA Team Edition Build Deposit

Special Edition Bike Details

The ERSA Framebuilding Team

One of the most important elements of the ERSA, or any bike you’re thinking about investing in, is who builds yours. Do they have extensive framebuilding experience? Do they understand what gravel riding is? Do they care as much as you do about cycling? Will your bike be durable and precisely as you requested?

With Seven, the answer to all of these questions is, yes. For The ERSA project we have two of our most experienced builders handcraft your frame. Between them they have nearly 30-years of framebuilding experience.

While working on your frame John and Stef work on nothing else. This singular focus creates a better frame with more precise details.

Framebuilder: John Tomai

John is a framebuilder’s framebuilder.

John has worked in the bike industry for more than a decade, and he’s been a framebuilder with Seven Cycles for over five years. In that time, he’s built more than 1,000 custom frames of every design imaginable. And he’s thought deeply about each one of them.

The ERSA bike project is a good fit for John because he has been riding dirt and gravel for years. Even more important, John is thoughtful about each element of the framebuilding process. Questioning everything and always looking to make improvements. You want John thinking about and working on your frame.

Welder: Stef Adams

You will not find a better frame in the world than one that Stef has welded.

Stef has been welding titanium frames for 20 years. This is more experience and certainly more frames welded than just about any welder ever. She’s lost count, but it’s many thousands of frames. Throughout her time welding, she’s continually refined her craft. A correct weld is a lot more than just a clean and even bead. Frame alignment and durability are essential, too. These invisible elements are only achievable through experience and focused practice. By that measure, you will not find a straighter, stronger, more beautiful frame anywhere by anyone.

Not only is Stef one of the most experienced titanium welders on the planet, she has designed many frames during her tenure at Seven. She’s worked with individual customers from the ground up to co-design some of the most smile-producing bikes on road and dirt.

Teamwork

Every bike project at Seven requires a team of people, including design, geometry, tubeset specifications, materials sourcing, inspection, bike assembly, shipping and receiving, back office work, and R&D. Every bike we build gets touched literally and figuratively by every person in the company. Every single employee is essential to the process of delivering your dream bike.


Titanium as a framebuilding material at Seven

Durable, light, and smooth with extremely tunable ride characteristics.

A well designed titanium gravel bike is about as good as it gets. The primary benefits of the 3-2.5 titanium alloy that Seven builds with include:

  • Super tough and strong
  • Smooth ride
  • Excellent wheel traction and surefootedness
  • The most tunable ride characteristics – from super stiff to super plush
  • Impervious to weather conditions

For more details and nuance about titanium’s attributes continue reading.

Seven’s Engineering Experience

Seven’s founding engineering team has overseen the fabrication of over 60,000 titanium frames. More than 30-years of titanium framebuilding experience helps Seven delivery the most finely tuned highest quality titanium frames available. Our founding engineer has more years of continuous titanium framebuilding experience than anyone else on the planet. This knowledge and heritage go into every frame we craft.

Seven’s Unique Approach with Titanium

Seven’s method of titanium framebuilding is extremely personalized and very engineered. There is not a single piece of the frame that Seven’s designers and engineers don’t modify or work to improve. This is true not only with the tubeset but also with the other parts of the frame. We design every single element in-house including the dropouts, bottom bracket, and head tube. Having complete control over every piece of the design results in a better performing bike every time. In-house designs also ensure a more durable lighter bike.

Titanium’s Defining Characteristics

Here are some of the universal defining characteristics of Seven’s titanium gravel frame designs:

  • Excels at long rides. The longer the ride the more titanium shines. The material’s shock absorption characteristics protect your body so you’ll have more energy and feel better at the end of the ride.
  • Good vibration damping characteristics. Chip seal pavement is a good example of high frequency vibration. When properly designed a titanium frame can virtually eliminate this type of vibration.
  • Toughness: It can handle rough treatment. If you’re tough on equipment titanium is the right material.
  • Excellent shock absorption. The rougher the pavement the more benefit you get from titanium.
  • Longevity: No frame material will last longer than a properly built titanium frame. Titanium’s fatigue life is longest of all bike materials. If you want a lifetime bike it has to start with titanium.
  • Light weight. Second only to carbon fiber, titanium offers the best balance of all characteristics riders usually want in a bike frame. Certainly the best strength-to-weight ratio of any material formed into frame tubes.
  • Impervious to environmental conditions, snow, rain, road salt, and sea air.
  • Tunable ride characteristics. Seven can control the drivetrain stiffness and vertical compliance independent of each other because of the way we can manipulate the tubeset.
  • Makes the best travel bike because it’s tough and doesn’t require paint.

The folklore of titanium’s "flexiness"

Titanium is a misunderstood material, if it’s understood at all. It’s most commonly misperceived that titanium frames are flexible. There have been plenty of flexible titanium frames made – especially in the early days of titanium. However, because the material is so tunable and controllable we can actually make a titanium frame extremely stiff if the rider desires that. We’ve built plenty of track bikes and bikes for riders over 300 lbs. If you want stiff, titanium may be the ideal material with which to build your frame.

Just because titanium excels at providing a shock absorbing ride doesn’t mean it has to be plush. If you want your teeth to rattle we can deliver.

Seven’s Proprietary “SL” Tubeset

Do It All, Up For Anything, Balanced Characteristics

Our most popular tubeset design, the SL provides a compelling balance of light weight, durability, and performance. We do this through butting the tubeset. More precisely, double-butting. The butting process makes the tubes stronger at the welds and lighter everywhere else. The SL tubeset has other unique features, including our exclusive dropout design, our machined in-house head tubes, and more.

And, as always, every frame we build is to whatever level of stiffness and plushness you want.

Seven has been building butted framed bikes for more than 20-years. In fact, Seven’s founding engineer invented the first process for butting tiitanium tube more than three decades ago. Since then, he’s invented a number of other titanium butting methods, too. And every year we find ways to refine and improve the SL tubeset design, dropouts, and all the small parts.

Here are a few of the benefits of Seven’s SL double-butted tubeset technology:

  • Climbing: Because of the SL’s design, the bike has better traction than any other material so you’ll climb faster. We can also tune the tubeset for optimal drivetrain stiffness.
  • Descending: Titanium’s shock absorbtion provides improved traction and tracking control which enables you to descend faster and with more confidence than with any other material.
  • Seven's SL tubeset can be a smoother, more comfortable, shock-absorbing ride than almost any other bike available because we tune the tubeset so specifically. Of course, if you prefer a super stiff frame, we can do that too.
  • Super tough for harsh conditions. This titanium SL design won’t let you down.
  • Extremely tailored: Our tube butting process is performed one tube at a time for each individual rider. Your bike will ride better for whatever your focus.

Rider Weight Range: For Seven’s SL butted titanium tubeset there is no rider weight limit.

Frame Model Details

Defining "Evergreen"

Seven’s Evergreen is our gravel and mixed-terrain bike. In essence, it’s a bike that has room for at least 40 mm tires, comes with disc brakes, and provides frame geometry and tubeset design that’s appropriate for varied terrain and conditions. The Evergreen is a versatile bike that can be road-fast with the right wheels, and expedition ready with bigger tires and more aggressive tread.

Defining "ERSA"

“ERSA” stands for Endurance / Race / Smooth / Airy

The ERSA design is optimized for both endurance gravel adventure racing and dirt road racing. The frame design is fast, stiff, and efficient. ERSA also means this is a double wheel design optimized for 700c and 650b wheels. ERSA also includes our most current technology and upgrades.

ERSA literally means:

  • E for Endurance: Designed to be ridden hard, all day long. Titanium helps a lot here. Our SL tubeset butting makes it even better. The frame geometry and fork Matador fork choice make the bike stable and easy to handle on long rides.
  • R for Race: Riding fast. So fast that sometimes you’re over your head, so the bike needs to handle confidently and predictably. You want every watt of energy you put into the bike to be turned into forward motion. We accomplish the handling through frame geometry and tubeset design. We get all your watts to the drivetrain by clever titanium application and tube butting.
  • S for Smooth: The titanium’s shock absorption enables you to descend faster and with more control than with any other material. That absorption also protects your body so you can use yourself for forward momentum rather than constantly bracing for micro-impacts and larger ones.
  • A for Airy: Very light. The ERSA Evergreen SL is one of the lightest gravel bikes available. Light means you can climb and accelerate more quickly. The titanium frame ensures that the bike is sturdy in spite of being light.

Frame Upgrade Details

Double wheel design: 700c and 650b

Your bike can be perfectly tailored to nearly any ride that includes dirt. The ERSA is optimized for:

  • 700c x 36 mm. The ERSA fits up to 45 mm knobbies.
  • 650b x 47 mm. The ERSA fits up to 54 mm knobbies or 2.1” mountain bike tires.
Dropped chainstay

The dropped chainstay design allows us to provide significant tire clearance for up to 650b x 54 mm tires while maintaining short chainstays to ensure agile race-ready handling.

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The drive side stay is dropped, and the non-drive side stay is inline, so the pair of stays is asymmetric.

Upcharge: $295 included in the bike price.

Asymmetric chainstays & dropouts

Making the drivetrain system asymmetric and purpose-specific allows us to make a substantially lighter drivetrain while increasing stiffness, tire clearance, chainring options, and a shorter chainstay length. All good things.

Upcharge: $195 included in the bike price.

Moto seat stays

Our Moto seat stays allow for more aggressive cornering, more sure-footed switchback descents, and better terrain feel in the worst conditions. This seat stay design is an upgrade from our standard, dual-bend inline seat stays.

With these stays, we’ve been able to improve rear tire traction without reducing frame stiffness. We achieve these traction improvements through a combination of a more aggressive bend profile and bending in multiple 3-dimensional planes. What you get is a seat stay with a more dramatic shape that dissipates multi-directional force while minimizing weight.

Upcharge: $95 included in the bike price.

T47 bottom bracket

T47 is an emergent standard that provides a larger stiffer shell for the most contemporary oversized crankset spindles and most durable bearing systems. T47 helps futureproof your drivetrain system options.

Upcharge: $95 included in the bike price.

Fender mounts

Unobtrusive fender mounts on both bridges and the dropouts make sure you’re ready for any weather. The fork has integrated fender mounts, too.


Fork Details

We designed the Matador carbon fork from the ground up. Seven’s 765 Endurance version of the Matador fork includes some essential features for endurance gravel riding:

  • 700c and 650b wheels: The number "765" stands for the two wheel sizes we’ve designed the fork for. This is not a trivial feat, but our latest generation Matador works with both wheels and an array of tire sizes. The fork fits up to 650b x 54 mm tires — or 2.1" — and up to 45 mm x 700c tires.
  • Smooth: Carbon forks are often overly stiff. This is fine for shorter rides, but for 100-mile mixed-terrain events, a smoother riding for will provide several advantages: you’ll feel better and less beat up at the finish. Your bike will handle better and have better traction on rough terrain.
  • Stable & predictable: No disc brake fork has more rake than the Matador. This long-rake design provides more predictable steering at changing speeds. The design also affords more front center for less toe overlap.
  • Flat mount brake mount: The Matador has a native flat-mount, so it’s future-proofed, lighter, and simpler than a lot of available forks.
  • Integrated fender mounts

You can find more specifications about Seven’s Matador forks.

Price Notes, Ordering, & Shipping

Questions? Contact us. We’re here to help.

We offer financing through PayPal, PayPal Credit, and PayPal Financing

The prices shown above include everything indicated in the offer except where upcharges are explained in the text.

For this specific offer, the bike price also includes:

  • Free shipping anywhere in the continental United States.
  • Shipping insurance to cover lost, stolen, or damage during shipping.
  • Primary assembly. The bike will be about 95% ready to ride. Tools not included.
Some Fine Print

Contact us with questions. We’re here to help.

Parts kits do not include anything that’s not included in the words on this page. Bike photos are not representative of the exact bike and buildout that you may receive. Water bottle cage, fenders, racks, etc. are not included unless stated in the text.

Each component and price is subject to change based on ongoing improvements and parts availability.