Fat Jack — Designer — Duratec


The most popular groupsets

Recommended groupset Price incl. tax Weight
rigid fork & SRAM X5 2x10sp Ritchey Comp 55 279 Kč 13433g
rigid fork SRAM X7 2x10sp Ritchey COMP 55 737 Kč 13393g
rigid fork Sh Deore 2x10sp Ritchey COMP 56 194 Kč 13278g
rigid fork SRAM GX 2x10sp Ritchey COMP 58 950 Kč 13651g
rigid fork SRAM GX 1x11sp Ritchey COMP 59 364 Kč 13250g
rigid fork Sh SLX 2x10sp Ritchey COMP 59 727 Kč 13325g
rigid fork SRAM X1 1x11sp Ritchey COMP 65 696 Kč 13196g
rigid fork SRAM X01 1x11sp DT Swiss Ritchey WCS 85 275 Kč 12018g

Konfigurujete pouze rám. Pro Vaši lepší představu Vám zobrazujeme celé kolo.



from 55 279 Kč
with groupset
rigid fork & SRAM X5 2x10sp Ritchey Comp


Frame colour Logo colour Base Frame Loading
  • Design

  • Mono Mono

    Frame colour

    • Arctic White
    • Attractive Green
    • Eclipse Black
    • Fire Red
    • Dark Blue
    • Light Blue
    • Classic Yellow
    • Orange
    • Light Pink

    Logo colour

    • Arctic White
    • Eclipse Black
  • Logo on frame

    Choose your logo

Extra charge paintjob:

Extra charge logo: 0 Kč

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Frame size

Basic Rider parameters

The smallest possible body height is 148cm The greatest possible body height is 210cm
The smallest possible weight is 40 kg The smallest possible weight is 40 kg The greatest possible weight is 150 kg The greatest possible weight is 150 kg

Rider profile

Describe yourself as a rider. This helps us with recommendations on appropriate components and setting a sitting position.


Health: You do not cycle for sport, but you love being out in nature and discover new things.

Hobby: Cycling means leisure to you. You do cycle to enjoy nature and keep yourself fit.

Sport: You do cycling for sport. When you are on the bike, you want to train yourself and compete with your friends.

Race: You are training seriously on your bike and sometimes compete at marathons and other races.

Professional: You want to win races at a high level, so being fast is the most important to you.


You are just starting to discover cycling for yourself.

You are just starting to discover cycling for yourself, but you do other sports on a regular basis.

You started cycling one or two years ago, and last year you did about 2000 km on your bike.

You spend lots of your time one you bike, which adds up to around 5000 km a year.

You have been cycling seriously for a long time and do 10 000 or more km a year.

Velikost rámu je nestandardní, musíme Vám vyrobit rám na míru. Budeme Vás kontaktovat

44 17.3 168-172 575 558 440 451 456 310 125 652 1099 47 91,2 808 390 623 69,5 73,5
46 18.1 173-178 586 567 460 451 456 310 135 658 1105 47 87,6 823 398 635 70,0 73,5
48 18.9 179-183 595 573 480 451 456 310 145 661 1109 47 87,6 837 398 644 70,0 73,0
50 19.7 184-188 605 581 500 451 456 310 145 666 1113 47 84,0 848 407 647 70,5 73,0
52 20.5 189-193 610 585 520 451 456 310 155 671 1119 47 84,0 862 409 656 70,5 73,0
54 21.3 194-198 615 590 540 451 456 310 155 676 1124 47 84,0 872 414 656 70,5 73,0




Thank you for your interest in a customised bicycle built by us.

You can now either SAVE AS PDF which you can print out for yourself or you can. START AGAIN if you feel that the configuration needs to be changed. EMAIL US to allow us to look over your configuration and we can advise by calling you direct. ADD TO BASKET will confirm your order with us and we will contact you by telephone to confirm. Payment is made at the time of order. Thank you

Price for complete bike 0 Kč

Weight 1800g

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DURATEC snow bikes have a long tradition. In 2007 Jan Kopka won the Iditarod Trail Invitational, the world's toughest race, where competitors have to cover almost two thousand kilometres through the Alaskan wilderness, on a DURATEC snow bike. All the extreme tests were conducted under arctic conditions north of the Arctic Circle, and the bike passed with flying colours!

Fat Jack is an aluminium frame made of 7020T6 alloy. We offer it with 4.0" width tyres in the standard version. It is no easy matter to build a frame for such a wide wheel, and it differs greatly from the regular design. We also have to accept the technical possibilities of the available components and adapt this frame to them. This applies in particular to components such as cranks, rims, tyres, hubs and their width, including fixing system. Upon request the frame can be manufactured with weld-ons serving for attaching carriers. The frame is prepared for rear disk brakes with Int'l Standard fitting. If requested, it is possible to prepare the bike for Rock Shock Bluto 26" front suspension forks with 100 mm travel. The entire bike is distinguished by very good handling, which the wide tyres also contribute to. These ensure stability on snow covered or icy surfaces. The bike handles deep snow excellently, and is also great for year-round use in the terrain and sand.

Standard fittings
possibility for fixing bottle cage to seat and down tube, replaceable hanger for derailleur, seat clamp diameter 31.8 mm, Int'l Standard fixing of disc brake, headset 1 1/8" - 1 1/2” FSA ORBIT IS2

Extra version
weld-ons on rear and possibly also front carrier (for rigid forks), adaptation of rear construction for 4.8" tyre, frame for Syntace X12 dropouts width 197 mm,  gear change cable and brake hose for set 1x11 speeds run internally, geometry for Rock Shox Bluto suspension forks

Connecting dimensions
frame geometry adapted for DURATEC FF02 rigid forks, wheel diameter 26", maximum diameter of brake disc 180mm, fork steerer 1 1/8" - 1 1/2", top-pull front derailleur, seat post diameter 27.2 mm, front derailleur for direct fitting + special adapter, hub thread BSA (100 mm), rear frame dropouts with spacing 190 mm, front dropouts of forks 150 mm, quick-release skewers fitting.

Frame geometry
download a table with the frame geometry here

Fat Jack

The head tube of the frame is conical, version for fork steerer 1-1/8" - 1-1/2". The larger diameter of the bearing in the lower part of the head ensures optimal distribution of the flexural moment from the braking force at the fixed point (i.e., at the level of the top surface of the fork crown).

Tapered Headtube Rear disc brake

At the same time as the frame, DURATEC front rigid forks for extreme conditions were developed for this model. The forks have aluminium legs and a post with dimension 1-1/8" - 1-1/2". In the basic version, it is prepared for a 150 mm wide hub and for disc brakes. The front wheel is attached using a quick-release skewer, and the brake is attached using the post mount system. We adopt an individual approach to the solution for fixing carriers and bags, because each competitor has his tried and tested products, which can be of differing dimensions.

Front fork Duratec Extended Bottom bracket

The model Fat Jack has a 100 mm wide bottom bracket because of the rear construction for wide tyres. The fixing of the front derailleur for direct fitting is dealt with using a special clamp manufactured in Duratec and added to the frame. The clamp ensures the correct position of the front derailleur in relation to the crankset. If a 1x11sp or 1x12 sp gear is selected, the frame has no fixture for the fitting of a front derailleur, and the rear derailleur cable and brake hose is integrated into the frame top tube.