Ride Faster. Explore Further. Push Boundaries
- Frame Material Reynolds 3AL 2.5V internally butted main triangle
- Frame Finish Satin bead-blast finish with brushed logos
- Headtube CNC machined 44mm
- Bottom Bracket Custom machined Ti T47 86.5mm
- Dropouts UDH, thru-axle
- Hanger Sram UDH
- Brake Mount 160 front / 160 rear flat mount
- Axle Size 12 x 142mm bolt thru
- Tyre Clearance Max. 700c x 50mm / 650b x 50mm
- Cable Routing Internal via custom entry ports or fully integrated cockpit option
- Front Derailleur 34.9mm band-on
- Max Chainring Size 1X 42t
- Seat Tube External 34.9mm
- Seat Post 31.6mm or 27.2mm with shim
- Headset In-Route ZS44 upper/EC44 lower (Chris King Aeroset 3)
Integral ZS44 upper/EC44 lower (Chris King inset 7/8)
We view all our riders as individuals and as such all our stock geometries are unisex in design – offering 11 finely tuned stock sizes from 50cm to 60cm, with the additional option of a full custom design and build (+£300).
Because every Esker frame is made to order in our Sussex workshop, we have complete control from start to finish. This allows us to control every step of production, and allows you to fine tune your Esker your way. From custom geometry through to bespoke finishes and more. So if a stock geometry frame doesn’t work for you, we’ll make you one that does, and with careful consideration on components we can further customise every build to ensure the fit is perfect.
We feel that having a frame that fits you perfectly is a critical part of the process. We have over 20 years of bike fitting experience and data to call upon to ensure your riding position is absolute pinpoint. You can make an appointment here for a fitting. No obligation.
Alternatively you can send us any fit data you have or if you have a bike that fits you perfectly, let us know and we can go from there.
Further information on our sizing and frame geometry can be found here.
Opting for an individually crafted frame presents the benefit of total customisation, tailored specifically to match your distinctive style and riding preferences. This flexibility enables the meticulous adjustment of each frame to cater to riders' specific needs, encompassing personalised frame geometry, customised cable routing, the addition of extra eyelets, and the option for unique frame finishes, including bespoke paint designs. Virtually anything is within the realm of possibility.
When considering complete bike purchases, the range of achievable specifications is extensive. If you have a specific vision for your upcoming bike build, just let us know, and we can turn your ideas into reality.
Step 1. Get in touch:
Call, email, or book a visit online by clicking here .
Alternatively, reach out to your local Enigma dealer, who will guide you through the process.
Step 2. Discussion:
To get started, please complete our
This form gathers essential details such as:
-Your personal information (name, address, contact details)
-Riding style
-Bike fit data (if known)
-Objectives and targets
If you don't yet have bike fit data, don’t worry—we can still move forward and gather that information later. Once we have this information, we’ll prepare a CAD drawing of your frame and start discussing your bike’s specifications, including geometry, finish, and components. We will also give you a price based on your preferences.
Step 3. Deposit:
If you're happy to proceed with your order, we will request a deposit of £1000 to confirm your place in the queue and move forward with the build process.
Step 4. Final Sign-Off:
We will send a final copy of your CAD drawing, a mock-up of your finished frame, and our Build Form for your approval. Once signed, your order will proceed directly to the workshop. At this stage, no changes or amendments can be made without incurring additional costs.
The next stage requires a bit of patience! We aim to have your frame completed within 60-90 days, depending on the level of customisation required for the geometry. If you're opting for a full bike build, we'll be busy during this time gathering and ordering all the necessary components. Once your frame is finalised, our mechanics will get to work on the assembly.
Throughout the process, you’ll receive updates from the workshop at key milestones to keep you informed on the progress. Please note that additional time may be needed for any custom paintwork.
When your Enigma is ready for handover, we’ll request payment of the remaining balance. We accept all major debit and credit cards and partner with leading Ride to Work schemes, as detailed below. Please note that some schemes may include a surcharge due to higher commission rates.
To streamline the process, we kindly ask you to confirm your preferred payment method when placing your order, including whether you plan to use a Ride to Work scheme. If you’re paying the full amount through a cycle scheme, your deposit will be refunded once we’ve received the funds from the voucher company.

The Inspiration
The Esker MK.2 is the culmination of our pursuit to create the ultimate race-inspired gravel bike. Designed to excel across diverse terrains, it combines the speed and precision of a road bike with the versatility and resilience needed for gravel adventures.
Crafted from Reynolds Gr9 titanium tubing, renowned for its lightweight strength, lateral stiffness, and durability, the frame strikes the perfect balance between agility, pace, and all-day comfort. The inclusion of Reynolds tubes not only enhances performance but also reduces frame weight as well as reinforcing our commitment to sustainability, aligning with our dedication to environmentally responsible production.
Each frame is a bespoke creation, meticulously crafted to order and embodying the exceptional artistry, engineering, and innovation that define Enigma Bicycle Works.
The Details
Every detail of the Esker MK.2 is engineered to elevate the gravel riding experience, seamlessly blending performance, versatility, and cutting-edge design. Inspired by its road-focused sibling, the Eikon, the Esker MK.2 features an optional integrated cockpit, offering a sleek, modern, cable-free aesthetic for riders who value both functionality and style.
A T47 bottom bracket enables clean, fully concealed cable routing, ensuring smooth operation and a clutter-free frame design. The frame’s generous tyre clearance of up to 50mm allows for a wide variety of setups, making it ideal for both fast gravel tracks and unpredictable terrain. Additionally, UDH (Universal Derailleur Hanger) dropouts enhance drivetrain precision and durability, ensuring reliable performance on even the most demanding trails.
Meticulously handcrafted in England, the Esker MK.2 offers customisation options, including additional mounts, fittings, and dropper seatpost compatibility. Designed for speed, endurance, and all-day exploration, the Esker excels as a race-ready gravel machine while offering exceptional adaptability for multi-surface adventures.
Key Features:

Precision Titanium Craftsmanship
Built using internally butted Reynolds 3AL 2.5V titanium tubing, the Esker MK.2 is engineered for optimal strength-to-weight ratio, combining lightweight agility with lateral stiffness for responsive handling. The custom-manipulated rear triangle enhances ride quality, ensuring a smooth yet lively feel on mixed terrain. Each frame undergoes dual-pass micro-TIG welding, delivering exceptional durability and craftsmanship.

Performance-Driven Engineering
Designed for seamless integration, the Esker MK.2 features internal cable routing as standard, with an optional fully integrated cockpit for a clean, aerodynamic look. The custom-machined T47 bottom bracket ensures maximum power transfer, while the 44mm head tube provides stability and precision steering, making it an exceptional choice for high-performance gravel riding....

Adventure-Ready Versatility
With tyre clearance up to 50mm, the Esker MK.2 is built to tackle everything from smooth gravel roads to rugged, off-road trails. UDH dropouts enhance drivetrain longevity and adaptability, ensuring compatibility with the latest drivetrain innovations. Fully dropper post-compatible and featuring custom mounting options, the Esker is ready for bikepacking, endurance races, and off-grid exploration.
Reviews
Esker MK.2Geometry
Frame Size (cm) | A - Effective Top Tube (mm) | B - Seat Tube (mm) | C - Head Tube (mm) | D - Chain Stay (mm) | E - BB Drop (mm) | F - Seat Angle° | G - Head Angle° | H - Fork Offset (mm) | I - Stack (mm) | J - Reach (mm) | K - Wheel Base (mm) | Down Tube OD | Top Tube OD |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
50 | 500 | 460 | 95 | 435 | 75 | 76 | 70.5 | 50 | 534 | 364 | 1008 | 42 | 32 |
51 | 510 | 475 | 105 | 435 | 75 | 75.5 | 70.5 | 50 | 544 | 366 | 1009 | 42 | 32 |
52 | 520 | 490 | 115 | 435 | 75 | 75 | 70.5 | 50 | 553 | 369 | 1020 | 42 | 32 |
53 | 530 | 505 | 125 | 435 | 75 | 74.5 | 71 | 50 | 564 | 371 | 1021 | 42 | 32 |
54 | 540 | 520 | 135 | 435 | 75 | 74 | 71 | 50 | 573 | 374 | 1027 | 42 | 32 |
55 | 550 | 535 | 145 | 435 | 75 | 74 | 71 | 50 | 583 | 381 | 1037 | 42 | 32 |
56 | 560 | 550 | 155 | 435 | 75 | 74 | 71.5 | 50 | 595 | 388 | 1043 | 42 | 32 |
57 | 570 | 565 | 165 | 435 | 75 | 73.5 | 71.5 | 50 | 604 | 390 | 1048 | 42 | 32 |
58 | 580 | 580 | 175 | 435 | 75 | 73 | 71.5 | 50 | 614 | 391 | 1053 | 42 | 32 |
59 | 590 | 595 | 185 | 435 | 75 | 73 | 72 | 50 | 625 | 398 | 1058 | 42 | 32 |
60 | 600 | 610 | 195 | 435 | 75 | 73 | 72 | 50 | 635 | 405 | 1068 | 42 | 32 |
The sizing chart below is designed as an approximation guide. If you need help determining the size frame you require, we always recommend a test ride and/or bike fit at either our showroom here in Sussex or at your nearest Enigma dealer, where possible. We have extensive experience fitting customers to our bikes and can confidently recommend the correct size for you
Sizing
Frame Size (Horizontal Top Tube) | Rider Height (cm) | Rider Height (Inches) | Saddle Height (mm) |
---|---|---|---|
50 | 158 | 5'2" | 660 |
51 | 162 | 5'4" | 680 |
52 | 166 | 5'5" | 700 |
53 | 170 | 5'7" | 720 |
54 | 174 | 5'8" | 740 |
55 | 178 | 5'10" | 760 |
56 | 182 | 6'0" | 780 |
57 | 186 | 6'1" | 800 |
58 | 190 | 6'3" | 820 |
59 | 194 | 6'4" | 840 |
60 | 198 | 6'6" | 860 |
Our team of expert fitters are always on hand to help you choose, so if in any doubt please get in touch.
Customer Bikes
Need some inpiration? Check out some of the latest Esker MK.2 builds.
Reserve Yours

Esker MK.2
Each Esker frame is meticulously handcrafted to order. Secure yours today and experience the very best of custom titanium gravel performance.
Build Deposit
Secure your place in our workshop frame-building schedule with a deposit.
*This deposit will be deducted from the total frame or bike price
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