Tailwind Electric Assist Tandem Bicycles
w/ Shimano Steps EP600 (Optional EP801 Motor Upgrade)
Available with road or mountain bars.
Built with the powerful Shimano Steps EP600 motor. It is one of the lightest e-bike motors on the market at 6.5lbs (EP801 only 5.9lbs) and has enough power to flatten most mountains. The Tailwind is not a motorcycle and you still get the full cycling experience. The Shimano system is quiet, smooth, powerful, and very natural feeling. The high capacity Li-Ion, 504 Wh battery last for many miles (or optional 630 Wh battery). My wife and I have taken it out for many 30 to 35 mile rides and only used one bar of the battery (~ 20%) each ride. The setting you use and how hard you work will greatly effect your battery life. The battery can charge to 80% in 2.5 hours, and a full charge takes 5 hours.
High quality component package on an electric assist tandem.
Available in:
Chrome-moly Steel (with and without S&S Couplers)
Custom Reynolds 7005 Aluminum (without S&S Couplers)
Titanium (with and without S&S Couplers)
Carbon Fiber (with and without S&S Couplers)
da Vinci Designs – Road Components
| Frame Material Retail Price |
$9,995 Custom drawn, oversize, multi-butted, Reynolds chrome-moly steel $10,275 Custom Reynolds 7005 Aluminum $14,595 Titanium $14,995 Carbon Fiber w/7005 bottom tube** S&S Couplers can be added to allow the frame to be taken apart and fit into airline approved luggage. Add $2500 on steel frames, $5100 on titanium, $4000 on carbon fiber frames (S&S Not available on aluminum frames) Also includes w/S&S Couplers: Easy-Split cable separators, spanner wrench, coupler grease, and self extracting crank bolts. Pre-cut and labeled reusable frame pads sold separately. **Carbon fiber with S&S Couplers is built w/steel bottom tube. |
| Shifters | Shimano Ultregra STI 2×11 – Optional Upgrade Di2 3×11 |
| Rear Derailleur | Shimano GRX – Optional Upgrade XT Di2 |
| Front Derailleur | Shimano GRX – Optional Upgrade XTR triple Di2 |
| Brakes | Avid BB7 Font and Rear Disc w/203mm rotors- Optional Upgrade Hydraulic Brakes & Icetech Rotors |
| Front Bars | FSA Wing Compact – 44cm (42, or 40cm options) |
| Rear Bars | Profile Stoker 26 – 47cm |
| Front Stem | 10º, 17º, 25º, or 40º , 90 to 130mm |
| Rear Stem | Control Tech Adjustable Stoker |
| Front Cranks | Shimano Steps Compatible 165, 170, or 175mm |
| Rear Cranks | da Vinci Designs Billet Machined (large choice of lengths) |
| Rear Cogs | 11-32, 11-34, 11-36, 11-40, or 11-42 |
| Driving Gears | Shimano Hyperglide 13-21-28 Equivalent to 26-42-56 or 24-39-53 |
| Front Hub | White Industries XMR Disc (QR or 15mm Thru-axle, depending on fork choice.) |
| Rear Hub | White Industries XMR Tandem Disc – 145mm |
| Rims | Velocity Dyad |
| Tires | Panaracer RIBMO 700×28, 700×32 or 26 X 1.25″ Vittoria Urbano 700×28, 700×32, 700×35, 700×37, 700×40 |
| Front Seatpost | 31.6mm |
| Rear Seatpost | Cane Creek Thudbuster ST |
| Saddles | Selle Italia S3 and/or Selle Italia Lady Flow |
| Colors | Click here to see the Paint Colors page |
da Vinci Designs – Hybrid Components
| Frame Material Retail Prices |
$9,895 Custom drawn, oversize, multi-butted, Reynolds chrome-moly steel $10,175 Custom Reynolds 7005 Aluminum $14,495 Titanium $14,895 Carbon Fiber w/7005 bottom tube** S&S Couplers can be added to allow the frame to be taken apart and fit into airline approved luggage. Add $2500 on steel frames, $5100 on titanium, $4000 on carbon fiber frames (S&S Not available on aluminum frames) Also includes w/S&S Couplers: Easy-Split cable separators, spanner wrench, coupler grease, and self extracting crank bolts. Pre-cut and labeled reusable frame pads sold separately. **Carbon fiber with S&S Couplers is built w/steel bottom tube. |
| Shifters | Shimano XT 3×11 – Optional Upgrade XT 3×11 Di2 |
| Rear Derailleur | Shimano XT – Optional Upgrade XT Di2 |
| Front Derailleur | Shimano Triple – Optional Upgrade XTR triple Di2 |
| Brakes | Avid BB7 Front and Rear Disc with 203mm rotors – Optional Upgrade Hydraulic Brakes & Icetech Rotors |
| Front Bars | Flat, or riser mountain bars, or mustache bars |
| Rear Bars | Profile Stoker 26 – 47cm |
| Front Stem | 10º, 17º, 25º, or 40º , 90 to 130mm |
| Rear Stem | Control Tech Adjustable Stoker |
| Front Cranks | Shimano Steps Compatible 165, 170, or 175mm |
| Rear Cranks | da Vinci Designs Billet Machined (wide choice of lengths) |
| Rear Cogs | 11-36, 11-40, or 11-42 |
| Driving Gears | Shimano Hyperglide 13-21-28 Equivalent to 26-42-56 (this is very customizable) |
| Front Hub | White Industries XMR Disc |
| Rear Hub | White Industries Tandem Disc – 145mm |
| Rims | Velocity Dyad |
| Tires | Panaracer RIBMO many sized to choose from. Vittoria Urbano 700×28, 700×32, 700×35, 700×37, 700×40 |
| Front Seatpost | 31.6mm |
| Rear Seatpost | Cane Creek Thudbuster ST or LT |
| Saddles | Selle Italia Man Flow and/or Lady Flow |
| Colors | Click here to see the Paint Colors page |
da Vinci Designs – Options & Upgrades
NEW with latest generation motors! Shimano integrated electronic shifting $600
This works with 1×11 or 1×12 drivetrains only.
Shimano Di2 electronic shifting $1900 upgrade
XT & XTR 11×3 drivetrain. Incredible range of gears.
Shimano Di2 with hydraulic disc brakes $2500 upgrade
Same as above with hydraulic disc brakes and 203mm IceTech rotors or TRP 2.3mm thick rotors.
Bigger battery BT-EN606. 630Wh 25% higher capacity than the BT-EN605 504Wh battery upgrade $170
Shimano motor upgrades/Options:
EP600 Default
EP801 $200
| Package A – $795 |
| Carbon Fiber Fork White Industries Freewheels for ICS Cane Creek 110 Headset House of Kolor Kandy or Two color fade paint job |
| Package B – $1495 |
| Carbon Fiber Fork White Industries Freewheels for ICS Cane Creek 110 Headset House of Kolor Kandy or Two color fade paint job Rolf Prima, or Spinergy Tandems Wheels |
| Wound Up Carbon Fiber Fork | Great comfort and performance upgrade | $500 |
| HT Carbon Fiber Fork | Light, strong and more “traditional” looking carbon fiber. Tapered steerer, 15mm thru-axle, room for 700x40mm tires | $475 |
| Zinn Duro CX Carbon Fiber Fork | Strong, tapered x-long steerer, 15mm axle, “everything rack” mounts, lowrider mounts, and rack eyelets. Taller than other forks. Room for 700×45 with fender or 48mm without. Price includes brake adaptor for 203mm rotor. | $550 |
| TRP Hy/Rd | Cable actuated, hydraulic disc brake. | $75/ea |
| White Industries Freewheels | These are the highest quality freewheels made and have been adapted to our Independent Coasting Drivetrain. Durable, precision, and sealed. 17, 18, or 19 tooth. This is included in both upgrade packages. | $185 |
| Titanium Bottom Bracket | Same design as stock (See Components page) Save 55g each | $75/ea |
| Cane Creek 110 Headset | The best headsets money can buy. Cane Creek has a 110 year Warrantee. This is included in both upgrade packages | $75 |
| Black Hubs and Spokes | This option is for bikes with White Industry Hubs and Velocity | $50 |
| Rolf Tandem Wheels | Paired spoke technology | $795 |
| Spinergy Tandem Wheels | Light, durable, and very comfortable. Available in 700c and 27.5″ (650b) | $795 |
| Cirrus Kinekt 2.1 shockpost | This is an even more comfortable and tunable suspension seatpost for the stoker. Available for different weight ranges | $100 |
da Vinci Designs – Options & Upgrades
Front Cranks
Shimano 175, 170, or 165mm
Rear Cranks
da Vinci Direct Drive Billet: 200mm, 180mm, 175mm, 172.5mm, 170mm, 167.5mm, 165mm, 160mm, 150mm, 3 hole 130/150/170mm, or 3 hole 120/140/160mm
Tires
| Model (F= Folding, W=Wire bead) |
Description | Actual Width | Weight | |
| Panaracer RIBMO 700×28 /F | Great, long wearing, stable, fast, and good puncture resistance. |
1.10″ (28mm) | 392g | |
| Panaracer RIBMO 700×32 /F | Wider version of above tire. | 1.25″ (32mm) | 400g | |
| Panaracer RIBMO 26″x1.25″ /F | Great, long wearing, stable, fast, and good puncture resistance. |
1.18″ (30mm) | 355g | |
| Panaracer RIBMO 26″x1.5″ /F | Wider version of above tire. | 1.45″ (36mm) |
440g | |
| Continental GP Four Seasons 700 x 28mm /F |
Great road tire ***Add $70 for the pair | 1.10″ (28mm) | 280g | |
| We have other tires. | We stock tires from skinny to knobby, please ask. | |||
Captain Stem
| 10 deg. rise | 60, 70, 80, 90, 100, 110, 120, 130mm | N/C |
| 17 deg. rise | 60, 75, 90, 100, 110, 120, 130mm | N/C |
| 25 deg. rise | 90, 100, 110, 120mm | N/C |
| 40 deg. rise | 90, 100, 110, 120mm | N/C |
Stoker Stem
| Control Tech Adjustable | Long 200 to 255mm. They can be cut shorter. | N/C |
| Control Tech Adjustable | Medium 170 to 225mm. They can be cut shorter | N/C |
| Extra Stoker Boom | Long stoker stem boom to switch between an adult and child stoker, and the adjustment of the stoker stem is not enough. |
$45 |
| 2″ (50mm) Stem Riser | This stem extension works with most bars to raise, or move it closer. . |
$48 |
| Fixed Length Titanium | Half the weight of an adjustable stem. Available in 160mm, 180mm, or 200mm. Custom length available for addition cost. | $125 |
Captain Road (Drop) Bars
| FSA Wing Compact | Comfortable shape drop bars with a shallow drop. 44cm (default), option 42cm | N/C |
| Profile Cobra | Carbon Fiber drop bars with ergonomic contours | $225 |
| ENVE Composites | What can you say, ENVE Composites drop bars, are light, strong, the best | $306 |
Captain Hybrid (Mountain) Bars
| Flat mountain bars | N/C | |
| Riser mountain bars for a more upright riding position | N/C | |
| Carbon Fiber flat or riser bars. Lighter and better vibration damping | $TBD | |
| Mustache bars offer a different hand position. | N/C |
Stoker handlebars
| Profile Stoker 26 Bars 47cm wide | Light, comfortable, multiple hand positions. Allows most fore/aft reach range. |
N/C |
| Profile WingA Stoker Bar 46cm | Same as above with OS Clamp (31.8mm) “Wing” flat area for comfort. | $37 |
| Profile Cobra Wing Stoker Bar 46cm | Similar to WingA above but carbon fiber, lighter, and hand contours for even more comfort. | $225 |
| 46cm Wide Drop Bars | Wide drop bars to clear the captain’s hips (price includes Cane Creek stoker levers). | $49 |
| 44cm Profile Cobra Drop Bars | Profile Cobra carbon fiber drop bars with Cane Creek stoker lever. | $274 |
| 44cm ENVE Composites Drop Bars | ENVE Composites carbon fiber drop bars with Cane Creek stoker lever. | $355 |
| Flat Mountain Bars | Some prefer the wider flat bars. Lighter, too. | N/C |
| 25 to 90mm Riser Bars | For tall stokers with short captains, or stokers who like to sit up more. | $20 |
| Bar ends | Add comfort and hand positions to flat bars or riser bars. | $25 |
Saddles
| Sella Italia Man Flow (TransAm) and/or Lady Flow (TransAm) |
| Velo Pronto and Serina Men’s and/or Women’s |
| We have other saddles. Call to inquire. |
Stoker Seatposts
| Thudbuster Short Travel | Lightest shockpost we stock., 440g. Includes different elastomers to tune spring rate. |
| Thudbuster Long Travel | Longest Travel, requires 144mm from saddle rails to top of seat tube, 565g. Includes different elastomers to tune spring rate. |
| Cirrus Kinekt Seatpost 2.1 | Advanced suspension design. Adjustable, active, comfortable. Add $100 529g Available in three weight ranges: 100-150lbs, 150-200lbs, 200-250lbs. |
Child Adapter
| Child Kit | Clamps to rear seat tube for higher crank location. Price includes BB Spindle and length of chain. This works great with our Three Hole Cranks |
$175 |
| Extra Stoker Boom | Long stoker stem boom to switch between an adult and child stoker, and the adjustment of the stoker stem is not enough. |
$45 |
