 | If you've ever spent time on a tandem, perhaps you, too, thought the ability to coast independently would significantly improve your ride. It's an idea whose time has long been coming. That's why da Vinci Designs is excited to offer quality hand built tandems that showcase the Independent Drive, an intermediate shaft that allows the captain and stoker the freedom to coast independently of each other. |
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| All da Vinci Designs tandem frames are hand crafted with quality materials in Denver Colorado by highly skilled technicians and painted by Brian Davis co-owner of da Vinci Designs. |
Carbon Fiber 700c - Clear or Carbon to Candy Oriental Fade |
| Advantages of da Vinci Designs Independent Coasting System |
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 drive train.
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| The main component of da Vinci Designs’ ICS is an intermediate drive shaft six inches in front of the rear bottom bracket. The intermediate shaft has two single-speed freewheels on the left side that are independently driven by the cranks at twice the rotating speed and half the torque. On the right side of the shaft, four Hyperglide™ cogs drive the bike. The chain rings are half the size as those on a conventional tandem because of the double rotation of the intermediate shaft. The combination of 12-, 18-, 24-, 30-tooth driving gears equals 24-, 36-, 48-, 60-tooth chain rings. The combination of the small 6-tooth gap, doubled rotation and the Hyperglide cogs gives da Vinci Designs’ tandems these technical advantages: |
- 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
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da Vinci Road Tandems |
Joint Venture (26” or 700c) (click here or scroll down for specs and pricing)
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In-2-ition Road (26”) (click here or scroll down for specs and pricing)
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Grand Junction (26”) (click here or scroll down for specs and pricing)
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| da Vinci Designs Road Tandems 2010 Specs | | Components | Joint Venture
(26” or 700c) | In-2-ition Road (26”) | Grand Junction (26”) | | ** Shifters | Campagnolo Chorus Ergo Carbon | Campy Veloce Ergo | Shimano Tiagra STI | | Rear Derailleur | Modified Sram X-9 | Modified Sram X-9 | Shimano Deore | | Front Derailleur | Campagnolo Triple | Campagnolo Triple | Custom Compact | | Brakes | Avid 1D-7 w/Travel Agent & Booster | Avid 1D-5 w/Travel Agent | Avid BB7 Disc w/203mm rotor | | Front Bars | Bontrager Race Lite OS drop bars | Bontrager Select OS drop bars | Anatomic Alloy Drop Bars | | Rear Bars | Profile Stoker bars | Profile Stoker bars | Profile Stoker Bars | | Front Stem | Bontrager Race X-Lite OS | Bontrager Race X-Lite OS | NVO Adjustable | | Rear Stem | Control Tech adjustable | Control Tech adjustable | Control Tech Adjustable | | Cranks | da Vinci Direct Drive any length | Sugino XD 175 and/or 170mm | Sugino XD 175x170 | | Rear Cogs | 11-32 9 Spd. | 11-32 9 Spd. | 11-32 9 Spd. | | Chainrings | Shimano Hyperglide 12-18-24-30* | Shimano Hyperglide 12-18-24-30* | 14-21-28 (28-42-56) | | Front Hub | White Industries M15 Racer | White Ind M15 Racer | 40 Hole Disc | | Rear Hub | White Ind Tandem Disc 145mm | White Ind Tandem Disc 145mm | 40 Hole Disc 145 mm | | QR | Salsa Flip-Offs | Salsa Flip-Offs | Formula | | Rims | da Vinci V-22:36h (700c 40h) | Alex DM-18 | Alex DA16 40h | | Tires | Schwalbe Stelvio 1.1” (Conti on 700c) | Panaracer Pasela 1.25 | Kenda Kwick Roller Sport 1.25” | | Seatposts | Thompson Elite / Thudbuster ST | Kalloy Uno front & rear | Kalloy Uno front & rear | | Saddles | Sella Italia TransAm X2 & Lady | Sella Italia TransAm X2 & Lady | Velo with cut-out | | Weight / Price | Weight / Price | Weight / Price | Chromoly
Frame | ~36.5lbs. / $4,700 | ~37lbs. / $3850 | $2850 pedals not included | Aluminum
Frame | ~33.5lbs. / $5,200 | ~34lbs / $4350. | Couplers Not Available | Titanium
Frame | ~34.5lbs. / $7,700 | | ~34.5lbs. / $7500 | Carbon Fiber
Frame | ~ $8,500 | | | *is equivalent to 24-36-48-60
** available with Shimano STI Shifters
- Joint Venture available as a triple. Call For Pricing.
S&S Couplers on Steel frames add $1,500
Titanium frames add $2,500
S&S Not available on aluminum frames.
All Chromoly or titanium tandems are available as Global models. Built with six S&S Couplers for convenient transportation in one 26"X26"X12" hard-side case. |
da Vinci Off-Road/Hybrid Tandems | 
Joint Adventure (click here or scroll down for specs and pricing)
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In-2-ition Off-Road (click here or scroll down for specs and pricing)
| | da Vinci Designs Off-Road Tandems / Hybrid 2010 Specs | | Components | Joint Adventure | In-2-ition Off-Road | | ** Shifters | Sram Grip Shift X-9 | Sram Grip Shift X-7 | | Rear Derailleur | Sram X-9 | Sram X-7 | | Front Derailleur | Campagnolo Triple | Campagnolo Triple | | Brakes | Avid 1D-7 w/ Rear Stiffy Brake Boost | Avid 1D-5 | | Front Bars | Profile Bar None w/ bar ends | Profile Bar None | | Rear Bars | Profile Stoker bars | Profile Stoker bars | | Front Stem | Bontrager Front Loading | Bontrager Front Loading | | Rear Stem | Control Tech adjustable | Control Tech adjustable | | Cranks | da Vinci - any length (see back) | Sugino XD 175 and 170mm | | Rear Cogs | 11-32 9 spd. | 11-32 9 spd. | | Chainrings | Shimano Hyperglide 12-18-24-30 * | Shimano Hyperglide 12-18-24-30 * | | Front Hub | White Industries M15 Racer | White Industries M15 Racer | | Rear Hub | White Industries Tandem Disc | White Industries Tandem Disc | | QR | Salsa Flip-Offs | Salsa Flip-Offs | | Rims | da Vinci Designs V-22 36h | Sun CR18 40h | | Tires | Schwalbe Marathon Racer 1.5" | Schwalbe Marathon HS 368 1.5" | | Seatposts | Thompson Elite / Thudbuster ST | Kalloy Uno front & rear | | Saddles | Sella Italia TransAm X2 & Lady | Sella Italia TransAm X2 & Lady | | Weight / Price | Weight / Price | Chromoly
Frame | ~36.5lbs. / $4500 | ~37lbs / $3650 | Aluminum
Frame | ~33.5lbs. / $5000 | ~34lbs / $4100 | *is equivalent to 24-36-48-60
** available with Shimano STI Shifters
- Joint Venture available as a triple. Call For Pricing.
S&S Couplers on Steel frames add $1,500
Titanium frames add $2,500
S&S Not available on aluminum frames.
All Chromoly or titanium tandems are available as Global models. Built with six S&S Couplers for convenient transportation in one 26"X26"X12" hard-side case. |
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