U.S. Built Custom Bicycles in Titanium and Titanium-Carbon Mix
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.
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.
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 |
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.
When flawless shifting, lightweight, and innovation are important to you, our Force-Eagle — Seven "Forgle"™:) — or in layperson's terms, a mullet. This progressive 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 HRD 1x electronic, 12-speed |
Derrailleurs | XX1 Eagle AXS eTap electronic12-speed, long cage 52t max, rear only, battery not included but Seven adds this to the kit. |
Brakes | Force hydraulic with Centerline XR rotors: 160 mm front & 140 mm rear |
Crankset | Force AXS 12-speed 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 |
Kit Accessories | SRAM eTap charger and cord |
If you want something that's not shown here, contact us. We can probably accomodate.
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.
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.
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 | Whisky No. 7 F12 aluminum, 12 degrees of flare, 31.8 mm clamp diameter, width is rider specific |
Bar Tape | Deda Elementi Logo, black |
Stem | Whisky No. 7 aluminum, 31.8 mm clamp diameter, length & angle is rider specific |
Seat post | Whisky No. 7 aluminum, set back, 400 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 |
Place a deposit today to get your own special edition Evergreen SL ERSA Titanium Alpha Build within four weeks.
ERSA Alpha Build DepositLight & 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 Alpha 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, 120 tpi. Wheels ship with tubes installed. |
Handlebar | Zipp Service Course 70 XPLR aluminum, 5 degrees of flare, 31.8 mm clamp diameter, width is rider specific |
Bar Tape | Fizik Tempo, 2 mm thick, Microtek, classic, black |
Stem | Zipp Service Course aluminum, 31.8 mm clamp diameter, length & angle is rider specific |
Seat post | Zipp Service Course aluminum, set back, 350 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 |
Place a deposit today to get your own special edition Evergreen SL ERSA Titanium Factory Build within four weeks.
ERSA Factory Build DepositRace-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 | ENVE carbon, 31.8 mm clamp diameter, width is rider specific |
Bar Tape | Fizik Tempo, 2 mm thick, Microtek, classic, black |
Stem | ENVE carbon, 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 |
Place a deposit today to get your own special edition Evergreen SL ERSA Titanium Team Build within four weeks.
ERSA Team Edition Build DepositOne 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.
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.
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.
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:
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:
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.
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:
Rider Weight Range: For Seven's SL butted titanium tubeset there is no rider weight limit.
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.
"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:
Your bike can be perfectly tailored to nearly any ride that includes dirt. The ERSA is optimized for:
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.
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.
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.
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 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.
Unobtrusive fender mounts on both bridges and the dropouts make sure you're ready for any weather. The fork has integrated fender mounts, too.
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:
You can find more specifications about Seven's Matador forks.
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:
Contact us with questions. We're here to help.
Parts kits and pricing does not include anything that's not included in the written words on this page.
Bike photos on these pages are for illustrative purposes only and do not necessarily represent our newest designs or the exact design you will receive. Your bike is likely to look different and have different features and options.
Components shown in photos are for illustrative purposes only and subject to change based on ongoing improvements and parts availability.
Bike accessories shown in photos are not included with any product offer unless stated in the text. Accessories include pedals, water bottles and cages, fenders, racks, bags, lights, etc.
Prices subject to change. Contact Seven for the most recent pricing before placing your order.