Flatten the hills. Reinvigorate your rides with electric motor assistance. Enjoy the handling, ride quality, and fit of a high performance bike while taming hills and headwinds.​ This custom electric-assist tandem amplifies both riders’ power to enjoy all the benefits of a tandem and an ebike.

Cycles Chinook eTandem
*Up to 27.5 X 3.1 Tires
Tame the Hills

Bike Specs

Frame Material: Fully custom Titanium Frame & Fork

Motor: Bosch Gen 4 Performance Line CX or Performance Line Speed

Speed: Assist up to 28mph

Tire Clearance: 27.5″x2.4″ standard; customize up to 5.1″

Q-factor: As low as 169mm for stoker and captain

Batteries: 1 or 2 Bosch frame-mounted 500Wh

Complete Bikes: From $19000

eTandem standard size geometry chart (Custom sizing available)

Head Tube125125145145145160160180175
Captain Effective Top Tube555555570570570590590570600
Captain Seat Tube500500500530530550560540550
Captain Standover776780792815808827838821827
Boom Tube737813724737775737775737724
Stoker Seat Tube420500320410500420450410390
Stoker Standover685747612685757696727682670
Head Angle71.571.572.572.572.572.572.572.572.5
Captain Seat Angle72.572.572.572.572.5727272.572
Stoker Seat Angle747474747474747474
Captain BB Drop555555555555556055
Stoker BB Drop555545555055506055
Fork Length420420420420420420420420420
Fork Rake606055555555555555
Front Center615615614614614628628613638

eTandem Build Kits (customization available)

Rival 22eTap
ForkTitanium Chinook Gravel Tandem fork, 1 1/8 - 1 1/2" steerer, 15mm x 100mm Thru AxleTitanium Chinook Gravel Tandem fork, 1 1/8 - 1 1/2" steerer, 15mm x 100mm Thru Axle
HeadsetCane Creek 40Cane Creek 110
Front seatpostAluminum 28.6mm x 350mm Zero SBThomson Elite 28.6mm x 330mm Zero SB
Rear seatpostCarbon suspension seatpost, 31.6 x 330mm x 20mm offsetCarbon suspension seatpost, 31.6 x 330mm x 20mm offset
Front handlebarRitchey Comp CurveZipp Service Course SL-70 Ergo
Rear drop handlebarRitchey Comp Curve with Cane Creek Stoker LeversZipp Service Course SL-70 Ergo with Cane Creek Stoker Levers
Rear bullhorn handlebarDeda Elementi Crononero or Profile StokerDeda Elementi Crononero or Profile Stoker
BrakesTRP Hy/Rd post-mountSRAM HydroHC post-mount
Rotors203mm floating rotors203mm floating rotors
ShiftersSRAM Rival 22SRAM Red eTap HRD
Front derailleurSRAM Rival 22SRAM Red eTap
Rear derailleurSRAM GX Type 2.1 Exact Actuation Long CageSRAM Red eTap Wifli with Chinook x Digirit extended cage
CassetteSunRace MX8 11-Speed 11-42T CassetteShimano XT CS-M8000 11-42 11-speed
Drive chainringsSRAM 50/34SRAM 50/34
Rear cranksSRAM Force BB30 with extended spindle for right side timing chainSRAM Force BB30 with extended spindle for right side timing chain
Front cranksSRAM Rival BB30SRAM Force BB30
Timing ringsSRAM 34tSRAM / Wolf Tooth 34t
Timing chain/beltSRAM PC-1170SRAM PC-1170
Drive chainSRAM PC-1170KMC X11e
HubsDT Swiss 350 HybridWhite Industries XMR
RimsSpank Oozy Trail 395+Spank Oozy Trail 395+

Accessories & Options

Anodized Logo colors

0, 1 or 2 sets of Couplers

Braze-On Mounts for bolt-on frame bags

Bar tape and accent colors

Stem length and bar width options

Tire and rim options