Versatile carbon 650B+/29er/29+ MTB

Frames from £995, Full bikes from £2,250

The Oykel is a super-versatile, lightweight carbon mountain bike frame, designed to work with a variety of wheel sizes. We're passionate about practical and versatile bikes and the Oykel is no exception, being able to accept 650B+, 29+ and regular 29er wheelsets.

Adjustable chainstay length

The dual rear axle dropouts means there’s no compromise on chainstay length to get the wheelsize you want. For 650B+ wheels, use the forward position to achieve a chainstay length of 425mm and for 29+ wheels, use the rearward axle position to provide a chainstay length of 440mm.

Big volume tyres

With big volume tyres and short chainstays, achieving adequate chainring/crank/tyre clearance is a real challenge, so the solution is to move that chainstay out of the way altogether! This is where the benefits of carbon fibre really comes into play. Working with carbon allows material to be moved around in a way that's impossible with steel. The elevated drive-side chainstay moves the frame away from the tyre, chain and chainrings and allows the rear wheel to be tucked in for quick, snappy handling.

In both 29" and 650B (27.5") configurations, the frame and forks will take a 3" wide tyre.

Singlespeed and Gates Carbon Drive compatibility

Continuing the theme of versatility, the Oykel is available with a choice of threaded BSA bottom bracket shell or the more modern PF30 shell. If choosing a PF30 shell, it can be fitted with an eccentric bottom bracket to make a single speed setup straightforward. The elevated drive-side chainstay also makes it simple to fit a Gates Carbon Belt Drive transmission. No split in the frame is needed.

Cable routing for both rear brake and rear derailleur are internal and keeping with the modern feel of this bike, there is no provision for a front derailleur. Running a 1X or singlespeed drivetrain reduces weight and adds to the simplicity of the bike. The wide range of gears available with a single ring at the front means the days are numbered for the front derailleur on bikes other than specialist touring bikes.

Rigid and front suspension options

The rigid carbon forks on the Oykel are suspension corrected meaning a swap between rigid and suspension (100mm-120mm travel) forks doesn’t radically change the bikes handling.

Front and rear wheels are designed round the 'Boost' standard. This is a bolt-thru axle design, 148mm X 12mm at the rear and 110mm X 15mm at the front. We also recommend using a Boost crank to move the chain 3mm outward for additional chain clearance with big tyres.


Small Medium Large X-Large
A - Head angle 69.5º 69.5º 69.5º 69.5º
B - Seat angle 73º 73º 73º 73º
C - Top tube * 567mm 595mm 623mm 646mm
D - Seat tube ** 394mm 434mm 470mm 505mm
E - BB drop 58mm 58mm 58mm 58mm
F - Chainstay length *** 425/440mm 425/440mm 425/440mm 425/440mm
G - Headtube length 92mm 112mm 117mm 132mm
H - Wheelbase 1063mm 1093mm 1120mm 1144mm
I - Front-centre 645mm 673mm 702mm 725mm
J - Fork offset 51mm 51mm 51mm 51mm
K - Trail **** 85mm 85mm 85mm 85mm
L - Reach 377mm 402mm 425mm 444mm
M - Stack 620mm 629mm 643mm 657mm

* Effective. ** Centre to top. ***forward setting/rearward setting **** Based on 650X3" tyres.


Unless otherwise agreed, all bikes will be setup with 10mm of spacers under the stem. Stem lengths and seatpost types (layback or inline) are frame size specific to enable maximum amount of adjustability. We can provide a dimensioned drawing of final setup on request.

Finding the right size

If you have questions about the frame size and position that suits you best, we can help. Just get in touch to discuss the fitting process and we’ll talk you through our online fitting form. If you already have fit information from a 3rd party, we can make use this too.



All our bikes are painted to order from a standard range of 30 colours. Metallic and custom colours are also available for an additional charge – as are custom colours and one-off graphics if you’re looking for something more individual.

For more information on our paint process, visit the Paint and graphics page.


We work closely with our Carbon Fibre manufacturing partners in Asia for the production of our carbon frames and the carbon forks on some of our steel models. We do not manufacture carbon products in-house, but all carbon frames and forks undergo final inspection, finishing and painting in our workshop on Scotland. Our manufacturing partner has been producing carbon product to the cycling community since 2006 and are world renowned for their expertise in the composites industry.


Use the options below to work out your ideal build spec. We ship directly to customers worldwide. For more information on international orders, see this page.


To place an order with us, configure the bike using the options below, fill out your name and email address and submit the form. This will take you to a page summarising the order and providing you with a link to pay the deposit.

Complete bike or frame only?

Size and colours


If you are unsure about what size you need, just select the 'to be confirmed' option above and we'll get in touch to help.

Delivery options

We ship bikes and frames worldwide.
For more information on international orders, see this page.

Total Cost



frame pic
Frame High Spec UD T700 Carbon Fibre
Fork Shand ONEPLUS Carbon fork, 110mm X 15mm thru-axle. 55mm offset (Rockshox Reba option)
Headtube/headset IS42/IS52
Bottom bracket 73mm PF30 or 73mm BSA shell
Seattube 27.2
Rear dropouts 148 X 12 Boost
Cable routing Internal routing for rear brake and rear derailleur, no support for front derailleur
Fittings Bottle cage mount on seattube, bottle cage/anything cage mount on downtube.
Weight* Frame : 1000g, fork : 650g, full bike : 9.5kg
  *approx weights, medium frame, without pedals

Frame only option available from £995 and Frame & Rigid Fork package available from £1,100. Use the order form at the right of the page to place an order.


Tyres Schwalbe Nobby Nic Evo 27.5 X 3.0 front, Schwalbe Rocket Ron Evo 27.5 x 3.0" rear
Wheels Halo Vapour Boost, 110mm x 15mm front, 148mm x 12mm rear, 50mm rim
Headset Shand IS42/IS52 Integral
Stem Shand
Bars Thomson Trail
Shifters Shimano XT M8000, 11speed, 1 X 11
Brakes Shimano XT M8000 hydraulic
Front Mech n/a
Rear Mech Shimano XT M8000 GS, 11speed
Chain Shimano XT
Crank Shimano XT
Bottom Bracket PF30
Cassette Shimano XT M8000, 11-42
Seatpost Shand