Tandem Big Bang C9 — Designer — Duratec

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The most popular groupsets

Recommended groupset Price incl. tax Weight
RockShox Reba SRAM NX Eagle DT Swiss Ritchey 106 985 Kč 15730g

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BIG BANG

MTB 29er 1x12sp

BIKE PRICE
from 106 985 Kč
with groupset
RockShox Reba SRAM NX Eagle DT Swiss Ritchey

Color

Frame colour Logo colour Colour - upper part Colour - bottom part Logo colour Frame colour Colour - front part Colour - stripes Logo colour front Logo colour rear Fork color Base Frame Loading
  • Design

  • Mono Mono

    Frame colour

    • Arctic White
    • Eclipse Black
    • Attractive Green
    • Ultramarine Blue
    • Light Blue
    • Fire Red
    • Light Pink
    • Deep Pink
    • Classic Yellow
    • Orange
    • 1508 Light Bronze

    Logo colour

    • CA171 White
    • CA172 Black
    • CA174 Titan Grey
  • Speedline Speedline

    Colour - upper part

    • Arctic White
    • Eclipse Black
    • Attractive Green
    • Ultramarine Blue
    • Light Blue
    • Fire Red
    • Light Pink
    • Deep Pink
    • Classic Yellow
    • Orange
    • 1508 Light Bronze

    Colour - bottom part

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

    Logo colour

    • CA171 White
    • CA172 Black
    • CA174 Titan Grey
  • Roadline Roadline

    Frame colour

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

    Colour - front part

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

    Colour - stripes

    • White
    • Black
    • Red
    • Green

    Logo colour front

    • CA171 White
    • CA172 Black
    • CA174 Titan Grey

    Logo colour rear

    • CA171 White
    • CA172 Black
    • CA174 Titan Grey
  • Fork color

    • Black
  • Logo on frame

    Choose your logo

Extra charge paintjob:
Inclusive

Extra charge logo: 0 Kč

  • Change background

    • Dark
    • Light
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Favouriter designs:

Frame size

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VR
 
cm
VR
 
inch
VP
[1]
cm
VP
[2]
cm
A1
[1]/[2]
mm
A2
[1]/[2]
mm
B2
[1]/[2]
mm
C1
 
mm
C2
 
mm
D
[1]/[2]
mm
F
 
mm
G
 
mm
H
 
mm
K
 
mm
L
 
mm
O
[1]/[2]
mm
R
[1]/[2]
mm
S
[1]/[2]
mm
α
 
mm
β
[1]/[2]
mm
44/38 17,3/15,0 165-171 149-156 586/686 571/674 440/380 445 450 300/300 125 668 1795 46 88,5 773/660 406/565 628/423 69,5 74,0/74,0
46/40 18,1/15,7 172-176 157-161 595/686 577/674 460/400 445 450 300/300 125 677 1804 46 88,5 771/679 415/559 628/442 69,5 74,0/74,0
46/44 18,1/17,3 172-176 167-171 595/712 577/709 460/440 445 450 300/300 125 677 1830 46 88,5 774/700 415/585 628/442 69,5 74,0/74,0
48/42 18,9/16,5 177-181 162-166 608/686 586/676 480/420 445 450 300/300 125 684 1817 46 88,5 770/698 422/556 628/460 69,5 73,5/74,0
48/46 18,9/18,1 177-181 172-176 608/712 586/712 480/460 445 450 300/300 125 684 1843 46 88,5 772/718 422/582 628/460 69,5 73,5/74,0
50/44 19,7/17,3 182-186 167-171 620/712 597/702 500/440 445 450 300/300 125 690 1850 46 85,0 773/717 433/576 631/479 70,0 73,5/74,0
50/48 19,7/18,9 182-186 177-181 620/739 597/739 500/480 445 450 300/300 125 690 1877 46 85,0 775/738 433/603 631/479 70,0 73,5/74,0
52/46 20,5/18,1 187-191 172-176 633/725 609/715 520/460 445 450 300/300 135 704 1877 46 85,0 780/736 443/583 640/499 70,0 73,5/74,0
52/50 20,5/19,7 187-191 182-186 633/739 609/736 520/500 445 450 300/300 135 704 1885 46 85,0 780/756 443/591 640/499 70,0 73,5/73,5
54/46 21,3/18,1 192-196 172-176 645/725 621/711 540/460 445 450 300/300 145 716 1889 46 85,0 808/745 453/578 649/518 70,0 73,5/74,0
54/50 21,3/19,7 192-196 182-186 645/739 621/731 540/500 445 450 300/300 145 716 1897 46 85,0 792/765 453/586 649/518 70,0 73,5/73,5

 

Dimension

Summary

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 3400g

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BIG BANG MTB 29er 1x12sp

Tandem, or a bike which two cyclists ride and pedal together. There are more or less two kinds of people who ride tandems: those who have completely fallen under the spell of tandem pedalling and have become aficionados and fans, and those for who it is the only means of movement and active sport as a result of their disability.  In the second case a blind or otherwise disabled rider sits behind the front rider.  

The MTB tandem Big Bang C9 is offered in a basic version for 29” wheels. The diversity of own production and highly individual approach in designing tandems offers customers unusual technical possibilities, not only in the choice of size or concept of custom frame. Based on the riders’ experience and the expected terrain or use, it is possible to choose a frame with geometry for rigid or suspension forks. We can also build the cabling of the Shimano XT Di2 electronic gear shifter into the frame, and the battery is located in the seatpost of the rear rider.

Big Bang C9

One new feature is the possibility of configuring the MTB tandem for the SRAM 1x12sp. groupsets. The cranksets have a special DURATEC chainring and connecting chain on the right side of the frame. You can find all the available versions below in the details or on the Configurator page.

Standard equipment
eccentric bottom bracket, one or two pairs of rivets for bottle cage for pilot (number according to size of frame), two pairs of rivets for bottle cage for rear rider, replaceable hanger for derailleur, seat clamp diameter 31.8 mm, version for rear disk brake controlled by front rider - fixing Post Mount, headset 1 1/8” - 1 1/2" FSA ORBIT IS, rear dropouts ready for BOOST system Syntace X12 Thru Axle - 148/12 mm

Additional features
geometry for rigid front fork (height 440 mm), adjustment of geometry of basic sizes according to build of riders, fixing for mudguards and carrier, preparing for disc size 203 mm, version for electronic set Shimano Di2 XT with battery integrated into seatpost of rear rider (cables run internally)

Mating dimensions
frame geometry for suspension fork with travel max 100 - 120 mm, wheel diameter 29", rear hub clearance 142 mm for thru axle 12 mm, diameter of brake disk 180 mm, fork steerer tapered 1-1/8 ÷ 1-1/2"", diameter of seatpost 27.2 mm, tyres max width 2.25" 

Frame geometry
download a table with the frame geometry here

Big Bang C9 Big Bang C9

▲ Very frequently discussed topic in the tandem cycling is a stiffness and resistance to torsion. Frame Big Bang C9 achieves high torsional rigidity mainly due to the tubes used for its construction. It is a material 7020T6 and oversize tube diameters. The lower and central tube having a diameter of 52 mm. At the middle of the frame tubes are specially shaped to resist high loads.

Big Bang C9 Big Bang C9

▲ Detail of special 36T chainring manufactured by CNC milling directly in Duratec. In the picture the chainring is fitted on SRAM NX Eagle cranksets.
▲ A detailed view of the eccentric bottom bracket used for tensioning chain between bottom brackets. More information here.

Big Bang C9 Big Bang C9

▲ A specially designed double chainring for connecting the bottom brackets of both riders. It is manufactured by CNC milling and is suitable for all SRAM cranksets which have a Direct Mount for the chainring. We offer a basic size of 36-36 teeth, and a 32, 34 or 36-tooth chainring can be fitted at the rear. Thanks to the double chainring we can link the bottom brackets of both riders by the chain on the right side. So it is not necessary to have a linking chain on the left and the gearing on the right. The system is very popular, and it lets a rider use cranksets of the standard SRAM offer. 

Big Bang C9 Big Bang C9

▲ Currently a fixing for a rigid axle is the trend for the front and rear fork. As a result we recommend that you order a frame with dropouts for Syntace X12 rear axle, which closes the rear triangle of the frame. This will significantly increase its torsional rigidity. So use a timeless solution and choose a technically advanced rigid rear axle.

Big Bang C9 Big Bang C9

▲ We manufacture tandem frames for wheels with diameter 29 inches. Depending on the required tyre width we are capable of adapting the rear construction for a boost system where the size of the rear hub is 148 mm in the version Syntace X12. Then the frame is suitable for a tyre width of up to 2.35”.

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