Timeless steel, modern performance, limitless journeys
- Frame Material Reynolds 853
- Frame Finish Single colour with contrasting logos
- HeadTube CNC machined 44mm
- Bottom Bracket BSA 68mm
- Dropouts Paragon UDH, thru axle
- Hanger Sram UDH
- Brake Mount 160 front / 140 rear flat mount
- Axle Size 12 x 142mm bolt thru
- Tyre Clearance Max. 700c x 50mm
- Cable Routing Modular external (guides supplied)
- Front Derailleur 34.9mm Band
- Max Chainring 1x 42t
- Seat Tube External 34.9mm
- Seatpost 31.6mm or 27.2 with a shim
- Headset Integrated ZS44 upper / EC44 lower (Chris King Inset 7/8)
Every rider is unique, and the Endeavour MK2 is designed to accommodate a wide range of adventures and riding styles. We offer stock geometry in sizes 50cm through to 60cm, ensuring a finely tuned fit for most riders. For those seeking a truly personalised experience, we also offer fully custom geometry for a £300 surcharge, allowing you to tailor every aspect of your frame to your exact specifications.
To maintain the best ride quality across all sizes, the Endeavour features size-specific tubing, ensuring optimal stiffness, compliance, and durability—whether you're riding multi-day endurance routes or tackling rugged off-road terrain. Getting the right fit is crucial, and with over 20 years of bike fitting experience, we’re here to help. We offer bike fittings as part of the ordering process, which you can book here with 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.
Every Endeavour is crafted to order, allowing for full customization in both geometry and functionality—whether that means specific mounts, tubing adjustments, or drivetrain compatibility. In addition, our award-winning paint team can create a truly one-of-a-kind finish, offering a wide range of custom paint and finishing options.
If you have specific preferences or requirements, we’d love to discuss them with you. Get in touch, and we’ll provide a personalised quote to bring your dream bike to life!
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.
We’re currently averaging 60 days from confirmation to handover for raw frames. If you've opted for custom geometry or paint, please allow up to 30 additional days to account for tubing procurement and finishing.
For full bike builds, we’ll be sourcing and preparing components while your frame is in production, ensuring a smooth transition to assembly once it's ready.
Throughout the process, we’ll provide key milestone updates to keep you informed. Please note that custom paintwork may extend the timeline slightly
When your Enigma is complete and ready for handover, we’ll ask you to settle the remaining balance. We accept all major debit and credit cards and work with leading Ride to Work schemes, as outlined below. Please be aware that some schemes may incur a surcharge due to higher commission rates.
To help streamline the process, we kindly ask you to confirm your preferred payment method, including whether you intend to use a Ride to Work scheme, when placing your order. If you plan to pay the full amount through a cycle scheme, your deposit will be refunded once we’ve processed your voucher—typically at the time of handover.

The Inspiration
The Endeavour MK2 is the latest evolution of our renowned steel adventure bike, now offered exclusively as a ‘Signature’ fully bespoke, custom-built frameset. This handcrafted machine is designed for exploration without limits, whether you're tackling multi-day bikepacking trips, rugged gravel tracks, or long-haul endurance rides.
Crafted using Reynolds 853 tubing, the Endeavour retains the timeless appeal of steel while incorporating modern performance features. Its stability-focused geometry, increased tyre clearance, and refined detailing make it the perfect companion for riders seeking comfort, control, and versatility across all terrains.
The latest refinements include stronger, stiffer UDH (Universal Gear Hanger) dropouts, ensuring full compatibility across all drivetrains. Additionally, an engraved stainless-steel bridge enhances both strength and aesthetics, while the optimised frame design accommodates tyres up to 50mm. Every Endeavour is built to order, offering a truly unique ride tailored to your specific needs.
The Details
At its core, the latest version of the Endeavour is engineered for durability, adaptability, and all-day comfort. Constructed with Reynolds 853 tubing in the main triangle and 631 stays, it offers a smooth yet responsive ride, perfectly balancing strength and compliance for long days in the saddle.
With increased tyre clearance to accommodate up to 50mm tyres, the frame is even more versatile across mixed terrain. A UDH dropout ensures compatibility with the latest drivetrain standards, while external cable routing simplifies maintenance—ideal for those who venture off the beaten path.
Designed for fully loaded adventures, the frame comes equipped with mudguard mounts, a third bottle cage mount, Di2 ports, and TT bag mounts as standard, offering complete setup flexibility. The 68mm British Standard threaded bottom bracket guarantees long-term reliability and ease of servicing, ensuring smooth performance for years to come.
Key Features:

Custom Steel Craftsmanship
Hand built to order from Reynolds 853 tubing, the Endeavour balances strength, comfort, and agility, delivering an exceptional ride quality across all terrains.

Modern Performance & Versatility
With increased tyre clearance (up to 50mm), a UDH dropout, and multiple mounting points, the Endeavour is designed for everything from gravel grinding to long-haul bikepacking.

Durability & Easy Maintenance
The engraved stainless-steel bridge not only adds an elegant finishing touch but also enhances the frame's structural integrity. A 68mm BS threaded bottom bracket ensures long-term reliability, while external cable routing makes servicing and maintenance straightforward.
Reviews
Endeavour MK2Geometry
Frame Size (cm) | A - 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 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
52 | 520 | 470 | 120 | 435 | 75 | 75.0 | 70.5 | 50 | 558 | 368 | 1021 | 38 | 32 |
54 | 540 | 500 | 140 | 435 | 75 | 74.0 | 71.0 | 50 | 579 | 372 | 1027 | 38 | 32 |
56 | 560 | 530 | 160 | 435 | 75 | 73.0 | 71.0 | 50 | 598 | 376 | 1037 | 38 | 32 |
58 | 580 | 560 | 180 | 435 | 75 | 73.0 | 71.5 | 50 | 619 | 390 | 1053 | 38 | 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 Endeavour MK2 builds.
Reserve Yours

Endeavour MK2
Each Endeavour is individually handcrafted to order, ensuring that every frame is built around your exact specifications. Secure yours today and experience the best of British built Steel.
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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