Tailwind Electric Assist Tandem Bicycles
w/ Shimano Steps E8000

Available with road or mountain bars.

Built with the powerful Shimano Steps E8000 motor. It is one of the lightest e-bike motors on the market at only 6.2lbs 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. 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
$8995 Custom drawn, oversize, multi-butted, Reynolds chrome-moly steel
$8995 Custom Reynolds 7005 Aluminum
$TBD Titanium
$12395 Carbon Fiber w/7005 bottom tube**
S&S Couplers* add $1900 on steel frames, $TBD on titanium, $2900 on carbon fiber frames
(S&S Not available on aluminum frames)*S&S Couplers allow the frame to be taken apart and fit into a small travel case.
Also includes : reusable frame pads, Easy-Split cable separators, spanner wrench,
special grease, and self extracting crank bolts.
**Carbon fiber with S&S Couplers is built w/steel bottom tube.
   
Shifters Shimano Ultregra STI 2×11, or 105 STI 3×10 – Optional Upgrade Di2 3×11
Rear Deraileur Shimano GRX, or Deore  –                  – Optional Upgrade XT Di2
Brakes Avid BB7 Front and Rear Disc w/203mm rotors- Optional Upgrade Hydraulic Brakes & Icetech Rotors
Front Bars FSA Wing Compact – 44, 42, or 40cm
Rear Bars Profile Stoker 26 – 47cm
Front Stem 10º, 17º, 25º, or 40º , 90 to 130mm
Rear Stem Control Tech Adjustable Stoker
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
Eccentrics da Vinci Designs
Front Hub White Industries
Rear Hub White Industries Tandem Disc – 145mm
Rims da Vinci Designs V-23 or Velocity Dyad
Tires Panaracer RIBMO 700×28, 700×32  or  26 X 1.25″
Front Seatpost 31.6mm
Rear Seatpost Cane Creek Thudbuster ST
Saddles Selle Italia Man Flow and/or Lady Flow
Colors Click here to see the Paint Colors page

 

da Vinci Designs – Hybrid Components

Frame Material
Retail Prices
$8895 Custom drawn, oversize, multi-butted, Reynolds chrome-moly steel
$8895 Custom Reynolds 7005 Aluminum
$TBD Titanium
$12295Carbon Fiber
S&S Couplers* add $1900 on steel frames, $TBD on titanium, $2900 on carbon fiber frames
(S&S Not available on aluminum frames)
*S&S Couplers allow the frame to be taken apart and fit into a small travel case.
Also includes : reusable frame pads, Easy-Split cable separators, spanner wrench,
special grease, and self extracting crank bolts.
   
Shifters Shimano XT 3×11 –  Optional Upgrade XT 3x11Di2
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
Cranks Shimano STEPS front
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)
Eccentrics da Vinci Designs
Front Hub White Industries
Rear Hub White Industries Tandem Disc – 145mm
Rims da Vinci Designs V-23 or Velocity Dyad
Tires Panaracer RIBMO
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

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

 

da Vinci Designs – Options  & Upgrades

Shimano Di2 electronic shifting  $2200 upgrade
XT & XTR 11×3 drivetrain. Incredible range of gears.

NEW Shimano Di2 with hydraulic disc brakes  $2800 upgrade
Same as above with XT hydraulic disc brakes and 203mm IceTech rotors

Package A – $675
Carbon Fiber Fork
White Industries Freewheels for ICS
Cane Creek 110 Headset
House of Kolor Kandy or Two color fade paint job
Package B – $1195
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, available for 26″, 700c and front disc brake Great comfort and performance upgrade $425
HT Carbon Fiber Fork Light, strong and more “traditional” looking carbon fiber. Tapered steerer, 15mm thru-axle, room for 700x40mm tires $425
Co-Lab CX Carbon Fiber Fork Strong, tapered steerer, 15mm axle, “everything rack” mounts, Lowrider mounts, dyno hub wire routing. Taller than other forks. Room for 700×45 with fender or 50mm without. $425
TRP Hy/Rd Cable actuated, hydraulic disc brake. $70/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 V-23 rims. $40
Rolf Tandem Wheels Through exclusive arrangements with Rolf, now available for 26″ road tandems as well as the standard 700c $600
Spinergy Tandem Wheels Light, durable, and very comfortable. $600