Tandem Big Bang R9 — Designer — Duratec

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The most popular groupsets

Recommended groupset Price incl. tax Weight
Shimano 105 DT Swiss Ritchey Comp 96 063 Kč 14338g
Shimano Ultegra DT Swiss Ritchey Comp 106 491 Kč 14337g
Shimano Ultegra Di2 DT Swiss Ritchey WCS 135 197 Kč 14417g
Shimano Dura-Ace DT Swiss Ritchey WCS 137 201 Kč 13735g
Shimano Dura-Ace Di2 DT Swiss Ritchey WCS 180 866 Kč 14007g

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BIG BANG

R9 disc brakes

BIKE PRICE
from 96 063 Kč
with groupset
Shimano 105 DT Swiss Ritchey Comp

Color

Frame colour Logo colour Frame colour Colour - front part Colour - stripes Logo colour front Logo colour rear Base Frame Loading
  • Design

  • Mono Mono

    Frame colour

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

    Logo colour

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

    Frame colour

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

    Colour - front part

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

    Colour - stripes

    • White
    • Black
    • Green
    • Red

    Logo colour front

    • CA171 White
    • CA172 Black
    • CA174 Titan Grey

    Logo colour rear

    • CA171 White
    • CA172 Black
    • CA174 Titan Grey
  • Logo on frame

    Choose your logo

Extra charge paintjob:
Inclusive

Extra charge logo: 0 Kč

  • Change background

    • Dark
    • Light
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Frame size

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VR
 
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VR
 
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VP
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VP
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A2
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B2
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C1
 
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F
 
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G
 
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H
 
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L
 
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O
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β
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50/46 19,7/18,1 157-164 149-151 529/686 513/679 500/460 405 411 270/270 125 583 1670 43 64,3 724/699 376/552 551/482 72,0 74,5/74,5
50/48 19,7/18,9 157-164 152-156 529/686 513/683 500/480 405 411 270/270 125 583 1670 43 64,3 717/709 376/552 551/482 72,0 74,5/74,5
52/41 20,5/16,1 165-170 140-151 539/686 524/667 520/405 405 411 270/270 125 587 1680 42 64,3 769/679 381/548 551/500 72,0 74,0/74,5
52/46 20,5/18,1 165-170 149-151 539/686 524/676 520/460 405 411 270/270 125 587 1680 43 64,3 749/707 381/548 551/500 72,0 74,0/74,5
52/50 20,5/19,7 165-170 157-164 539/705 524/704 520/500 405 411 270/270 125 587 1699 43 64,3 735/728 381/567 551/500 72,0 74,0/74,5
54/46 21,3/18,1 171-175 149-151 549/686 537/671 540/454 405 411 270/270 125 597 1690 43 64,3 778/713 391/542 551/519 72,0 74,0/74,5
54/50 21,3/19,7 171-175 157-164 549/705 537/699 540/500 405 411 270/270 125 597 1709 43 64,3 762/737 391/561 551/519 72,0 74,0/74,5
54/52 21,3/20,5 171-175 165-170 549/712 537/709 540/520 405 411 270/270 125 597 1710 43 64,3 755/746 391/563 551/519 72,0 74,0/74,0
56/50 22,0/19,7 176-178 157-164 560/705 550/694 560/496 405 411 270/270 125 598 1715 43 61,2 788/743 396/556 552/537 72,5 73,5/74,5
56/52 22,0/20,5 176-178 165-170 560/712 550/705 560/520 405 411 270/270 125 598 1717 43 61,2 780/755 396/558 552/537 72,5 73,5/74,0
56/54 22,0/21,3 176-178 171-175 560/712 550/710 560/540 405 411 270/270 125 598 1717 43 61,2 773/765 396/558 552/537 72,5 73,5/74,0
58/52 22,8/20,5 178-182 165-170 571/712 561/700 580/517 405 411 270/270 145 610 1728 43 61,2 807/763 402/553 571/556 72,5 73,5/74,0
58/54 22,8/21,3 178-182 171-175 571/712 561/705 580/540 405 411 270/270 145 610 1728 43 61,2 799/774 402/553 571/556 72,5 73,5/74,0
58/56 22,8/22,0 178-182 176-178 571/738 561/736 580/560 405 411 270/270 145 604 1749 43 61,2 791/783 396/574 571/555 72,5 73,0/73,5
60/54 23,6/21,3 183-188 171-175 583/712 572/701 600/536 405 411 270/270 165 616 1741 43 61,2 826/780 405/548 591/574 72,5 73,0/74,0
60/56 23,6/22,0 183-188 176-178 583/738 572/731 600/560 405 411 270/270 165 616 1761 43 61,2 817/792 402/568 591/574 72,5 73,0/73,5
60/58 23,6/22,8 183-188 178-182 583/738 572/735 600/580 405 411 270/270 165 616 1756 43 61,2 810/802 402/563 591/574 72,5 73,0/73,0
62/56 24,4/22,0 189-195 176-178 595/738 584/725 620/556 405 411 270/270 185 628 1774 43 61,2 845/799 409/563 610/593 72,5 73,0/73,5
62/58 24,4/22,8 189-195 178-182 595/738 584/730 620/580 405 411 270/270 185 628 1768 43 61,2 837/811 409/557 610/593 72,5 73,0/73,0
62/60 24,4/23,6 189-195 183-188 595/738 584/735 620/600 405 411 270/270 185 628 1768 43 61,2 830/821 409/557 610/593 72,5 73,0/73,0

 

Dimension

Summary

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Price for complete bike 0 Kč

Weight 3400g

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BIG BANG R9 disc brakes

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.  

Building a tandem requires a highly individual approach, especially in its geometry and design. It is necessary to combine two frame sizes so that the result suits both riders.  Thanks to its custom production and mainly to its extensive experience of many years with tandems, Duratec, can fine tune and design the frame geometry and then manufacture the frame and naturally also assemble the complete tandem. Duratec is the official partner of many national teams of disabled athletes around the world.  Representatives of Australia, the Netherlands, Brazil, Ireland, Greece, Russia, Belgium, Austria, Germany, Spain and many other countries are the best references for our products.  

Chains on the right side

Big Bang R9 is a road tandem intended for racing. This model is suitable for hydraulic disk brakes. Large-diameter tubes made of 7020T6 aluminium alloy are used for construction of the frame. The large diameters of the tubes ensure the rigidity of the frame and effectively resists stress in the direction of torsion. Overall this is an extremely high quality frame in terms of strength and rigidity. One part of the frame is an eccentric bottom bracket located in the pedalling axis of the front rider which can be rotated to tension the chain between the two bottom brackets. For this model Duratec has developed and manufactured a wholly unique dual chainring, the fitting of which ensures that the chains (drive system) are located only on the right side. If electronic gear shifting is selected, we adapt the frame so that it is possible to run the Shimano Di2 cabling inside the frame. The battery is integrated in the seatpost of the rear rider. You can find all the available variants and current prices below in the details or on the Configuration page. 

Standard equipment
eccentric bottom bracket, one or two pairs of inserts for bottle cage (qty according to size of frame), two pairs of inserts for bottle cage for rear rider, replaceable hanger for derailleur, seat clamp diameter 31.8 mm, version for disc brakes controlled by pilot, headset 1 1/8” - 1 1/2" FSA ORBIT IS; eccentric bottom bracket for tensioning chain between 

Extra version
modification of basic frame measurements according to the requests or cyclists' body; location of drive only on right side; fixing for mudguards and carrier; additional brake for stoker (V-brake); version for electronic set Shimano Di2; Gates Carbon Drive™ System between 1st-2nd BB (belt)

Connecting dimensions
frame geometry for Duratec fork with height 397 mm ( fork steerer 1-1/8"÷1 1/2", length of steerer 320 mm), wheel diameter 28" (622), rear hub clearance (OLD) 135 mm, maximum diameter of brake disk 180mm,tire clearance 25mm, bottom-pull front derailleur, diameter of seatpost 27.2 mm, front derailleur on clamp diameter 34.9 mm

Frame geometry - Download a table with the frame geometry here . 

Front fork Duratec

DURATEC F02 front fork is made of 7005T6 aluminium alloy and has conical post 1-1/8“-1-1/2“, crown diameter 50 mm, weight 720 g. The fork is offered in many variants according to the individual disciplines and selected types of brakes. For example road for calliper brakes, road for disk brakes, track fork etc. The crown diameter seamlessly blends with the frame head, and the transition between these parts is compact. The fork is certified for tandem use. 

Specially developed chainring for linking bottom brackets of both riders. Manufactured by CNC milling and suitable for Shimano and SRAM cranksets.

Developed chainring Large-diameter tubes

Specially developed dual chainring for linking bottom brackets of both riders. Manufactured by CNC milling and suitable for Shimano and SRAM cranksets. We offer two sizes, 36-36 teeth and 39-39 teeth. Thanks to the dual chainring we can use the chain to link both bottom brackets on the right side. It is not necessary to have a linking chain on the left and driving unit on the right. The system has gained great popularity because a rider can use standard cranksets such as the Shimano Ultegra or SRAM.

Frame detail Disc brakes

Very frequently discussed topic in the tandem cycling is a stiffness and resistance to torsion. Frame Big Bang R9 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.

Exchangeable RD hanger Průchodnost
The parts used for construction and manufacturing of frames including rear dropouts of the frame, derailleur hangers, chain grip, in-line cable adjusters and others are made in CNC milling centre. The advantage of this kind of machining is reaching a high precision of machined parts. This technology guarantees a high quality of the surface of machined parts, very clean cutting and a very neat “high-tech” design. Rear derailleur hanger is exchangeable.