Esker - Frame
Esker - Frame
Esker - Frame
Esker - Frame
Esker - Frame
Esker - Frame
Esker - Frame
Esker - Frame
High Performance & Premium Quality Gravel/Cross Race Bike

Where the endurance road bike meets the fast cross bike. That’s where you’ll find the versatility and performance offered by the Esker GR. Created for those wanting a little more adventure but not willing to compromise on style and performance. 

Handmade frames built to perfection by the Enigma team here in our Sussex workshop. Every Signature frame is meticulously crafted to exacting standards using the finest hand selected materials and is designed to deliver exceptional performance combined with an aesthetic that is classic, beautiful and ‘British’.

  • Frame Material 3al 2.5v / 6Al 4V titanium blend
  • Frame Finish Included Satin Bead with Anodised Logos
  • Axles 12mm x 100mm Front, 12 x 142mm Bolt Thru
  • Bottom Bracket T47 86.5mm
  • Brake Mount Flat Mount, 140 or 160mm Rotor
  • Seat Tube Internal 31.6mm or 27.2 with a shim
  • Seat Tube External 34.9mm
  • Headset Integrated ZS44 Upper / EC44 Lower (Chris King Inset 7/8)
  • Tyre Clearance 700c x 45mm / 650b x 50mm
  • Front Derailleur 34.9mm Band

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. Our set frame sizes at 1cm increments will work very well for the majority of people but there is also a full custom geometry option (extra charge) should the set size not work for you.

Please see our sizing / geometry page

Each Esker is handmade to order in our Sussex workshop which gives us complete control over the whole process from start to finish. This means each frame can be tuned to each riders’ specific needs, whether it be custom frame geometry, tyre clearance, cable routing, eyelets, frame finish and more. For bike purchases, the world really is your oyster so if you have a specification in mind for your new bike, we can source components from almost any manufacturer. Just let us know your preferences and we can make it happen.

If you purchase a complete bike, it will be supplied fully assembled although a small amount of assembly may be required if the bike is shipped via a courier service. We can build a bike using components supplied by customers, please get in touch to discuss options and prices.

To get started call, email or book a workshop visit online via our website. We will discuss your riding style, your objectives and targets as well as considering any existing bike fitting data that you may have. This information will enable us to create a precise picture of just what you are looking for.

Alternatively speak to one of our chosen cycle retail partners to guide you through the process, all carefully selected for the expertise, facilities and service they provide

Once the design and specification are complete and signed off, we will request a deposit of £1000 to hold your production slot. Once the deposit has been made, your bike will then be added to our workshop build list. It’s at this point that we will collate all of your chosen build parts for assembly.

Please note, if you’re intending to pay through a cycle scheme then your deposit will be refunded once we’ve processed your voucher, normally upon handover of your bike or frameset

Our current lead time is between 1 – 2 months. A painted frame finish tends to add another 30 days.

Yes, we offer 0% interest packages from Santander Consumer Finance, please get in touch for more details.

We work with all the major Ride to Work schemes including:

Frame Buying Options

Esker - Frame

Our Signature Esker frame includes a satin bead finish with a choice of either mirror or anodised logos as standard. Please see our finishing page for more information.

    Frame Only Price:
  • Stock Size - £3550
  • Price includes T47 Bottom Bracket & Internal Routing
  • Custom Geometry Upcharge + £300
    Frameset Price:
  • From - £4028

The frameset price includes our own C-Six ADV or GRV Carbon Adventure/Gravel Fork, TK036A Tapered headset, titanium seat collar, thru axles front and rear and any appropriate guides.

Upgrade Option – Add a Chris King Inset 7 Headset & Enve Gravel Series Fork for an extra £377


‘Esker’ a long ridge of gravel and other sediment typically having a winding course – Dictionary definition.

The aptly named Esker GR is designed to be the versatile solution that will take you where standard road bikes simply can’t go. Like all Enigma ‘Signature’ frames the Esker GR is handcrafted from a carefully considered titanium tube set that includes a 6AL 4V down tube for increased lateral rigidity and strength. Designed, assembled and finished with care and an almost maniacal attention to detail, the Esker is still further tailored for that extra versatility and off-road capability.

Whether for fast gravel, endurance rides, a local cyclo-cross or a world tour event, the Esker provides the ultimate platform. Every Esker frame is built to order, handcrafted and finished right here in our Sussex workshop.

Like all Enigma ‘Signature’ frames the Esker GR features our house geometry design for a first-class fit while a full custom geometry option is available for riders with specific requirements. In addition, a huge range of frame finishes are available to choose from for that little extra touch of individuality.

Enigma Customer - Simon Cook

Basically I'm really, really pleased with it - it's comfortable, stable and looks great! It's been on and off road locally on the Ridgeway (dry dirt flint track) and round the Elan Valley and forest tracks in Wales and covered well over a thousand miles so far. 



The sizing chart will help get you on the right size bike, please also refer to the geometry table for full specification. Learn more about Enigma Bike Sizing

Enigma Esker Disc Brake

Frame Size A - Top Tube (mm) B - Seat Tube C - Head Tube D - Chain Stay E - BB Drop F - Seat Angle G - Head Angle H - Fork Length I - Stack J - Reach K - Wheel Base Down Tube OD Top Tube OD
50 50 460 95 430 75 76.0 70.5 400 534 363 1003

51 51 475 105 430 75 75.5 70.5 400 544 366 1009

52 52 490 115 430 75 75.0 70.5 400 556 368 1015

53 53 505 125 430 75 74.5 71.0 400 564 371 1016

54 54 520 135 430 75 74.0 71.0 400 574 374 1022

55 55 535 145 430 75 74.0 71.0 400 583 381 1032

56 56 550 155 430 75 74.0 71.5 400 595 387 1038

57 57 565 165 430 75 73.5 71.5 400 604 390 1043

58 58 580 175 430 75 73.0 71.5 400 614 391 1048

59 59 595 185 430 75 73.0 72.0 400 625 398 1053

60 60 610 195 430 75 73.0 72.0 400 635 405 1063


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.