DaVinci Designs: Grand Junction Tandem


Special Sale!!!  


Making the ICS drivetrain available for riders seeking an entry level tandem has been a dream of ours for many years.

da Vinci Designs has partnered with the best steel frame fabricator in Taiwan to bring you a more affordable tandem with all the benefits of the ICS drivetrain. The Grand Junction also uses the same high quality Reynolds tubing used in our Denver-built tandems.

If you’ve been looking at a da Vinci tandem, but the price has held you back, the Grand Junction is the bike for you.


da Vinci Designs’ Independent Coasting System (ICS) offers you a riding experience both on and off road that equals or surpasses the best you’ve had on a single or tandem bike. The ICS makes for a far more intuitive, comfortable and efficient ride. This newfound ability to independently or collectively coast, pedal and position your cranks at will offers these advantages:

  • Starting, stopping and going through corners are as easy as on a single bike.
  • Captain and stoker can independently relax, take a drink, adjust seat position, stand for a few seconds to relieve weary sit bones, even take a moment to gaze at scenery, while the other keeps pedaling.
  • Traversing obstacles is easier and more efficient because the captain and stoker can coordinate avoiding the obstacles while maintaining forward momentum.
  • Asynchronous pedaling decreases strain on the final drivetrain.


  • Smooth and fast front shifting – The closer the chain rings are to the same size, the easier it is to shift. Other tandems, and even single bikes, are forced to use a 12-tooth gap between chain rings.
  • Unprecedented range of gears – Four chain rings and eight rear sprockets mean 32 gears that range from 18 to 140 gear-inches. No other tandem gives you that many gears or that kind of range.
  • More ground clearance – Nice when you lift your tandem over a curb, out of a truck, or when you are off road.
  • Stronger, lighter chain rings that are less prone to bending
  • Less strain on the chain while shifting



Road Tandem
Small Medium Large/Small
Front Seat Tube C/T
20.5″(52.1cm) 22″(55.9cm) 22″(55.9cm)
Rear Seat Tube C/T
16.75″(42.5cm) 18.75″(47.6cm) 16.75″(42.5cm)
Front Seat Tube C/C
17.2″(45.3cm) 19.3″(49.1cm) 18.75″(47.6cm)
Rear Seat Tube C/C
14.2″(36.1cm) 16.2″(41.1cm) 14.2″(36.1cm)
Front Standover* 29.6″(75.3cm) 31″(78.7cm) 31.6″ (80.4cm)
Rear Standover* 26.1″(66.2cm 27.9″(70.9cm) 26.4″(67.2cm)
Front Top Tube
21.5″(54.6cm) 22″(56cm) 22.5″(57.2cm)
Rear Top Tube
28.4″(72.1cm) 28.4″(72.1cm) 28.4″(72.1cm)
Head / Seat Tube
73/73 Deg. 73/73 Deg. 73/73 Deg.
BB Height * 10.5″(27cm) 10.5″(27cm) 10.5″(27cm)
(See drawing “R”)
14.9″(37.8cm 15″(38.1cm) 15.2″(38.6cm)
(See drawing “S”)
21.7″(55cm) 22.9″(58cm) 23.8″(60.5cm)
Frame Material Custom drawn, oversize, multi-butted, Reynolds chrome-moly steel
Rear Deraileur Shimano Deore
Front Deraileur Compact Triple
Shifters Shimano Tiagra STI
Brakes 200mm Avid BB7 Disc Front and Rear
Front Bars OS 44cm Anatomic Drop Bars
Rear Bars Profile Stoker 26 47cm
Front Stem NVO TM-3 3D Forged OS
Rear Stem Control Tech Adjustable Stoker
Cranks Sugino Fuse 175mm Front, 170mm Rear
Rear Cogs Sram PG-950 11-32 9sp
Driving Gears Hyperglide 14-21-28 Equivalent to 28-42-56
Eccentrics da Vinci Designs Custom
Hubs 40 hole Disc Brake. 145mm Rear Spacing
Rims Aero Profile 40h Alex DA16
Tires Kenda Kwick Roller 26 X 1.25
Front Seatpost Kalloy Uno 31.6mm X 350mm
Rear Seatpost Kalloy Uno 31.6mm X 350mm
Saddles Velo Pronto and Serina
Colors Metallic Red or Metallic Blue
Retail Price $3495 Custom frame sizes, S&S Couplings, and Custom Paint not available on the Grand Junction Sizes: Small, Medium, and Large/Small Only


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