Skip to product information
1 of 9

Shift Plus i/O 9

Shift Plus i/O 9

Regular price $6,399.99
Regular price $6,399.99 Sale price $6,399.99
Sale Out of stock

SKU: SKU:11981

Our top-of-the-line Shift I/O 9, is equipped with our new 160mm travel 4-Bar linkage frame, high-end Fox 36 Performance fork and Float X2 rear shock, Shimano XT Di2 shifting and a new EP-800 mid-motor drive combined with two different wheel sizes (for M to XL-sized frames) with a 29" front wheel and a 27.5" rear wheel for an unmatched riding feel. The Shift I/O 9 with XT Di2 specs is sure to satisfy the inner tech geek in all of us with its capacity to fine-tune motor settings with its handlebar computer display and a downloadable E-Tube app for on-the-fly adjustment through a smart phone and a Bluetooth connection.

Sizing Guide

Size Table
S5'3" - 5'8"160 - 172.5
M5'7" - 5'11"170 - 180
L5'10" - 6'1"177.5 - 185
XL6' - 6'4"182.5 - 192.5


View full details


  • Shift I/O X6 Aluminum frame for Shimano STePS E8000 motor, 160mm travel
  • Fox Float X2 air shock, Trunnion, 225x75mm
  • Fox Rhythm 36 FLOAT "E" 29" fork, 160mm travel, Boost
  • Shimano STePS EP-800, 250 Watts, 85Nm Torque
  • Darfon 630Wh internal battery
  • Shimano E7000 Mode switch, Integrated speed sensor
  • Shimano XT Di2, 11-spd, Shadow Plus rear derailleur & shifter
  • Shimano XT 11-spd, 11-46T cassette
  • Shimano EP-800 crankarms, forged, 34T chainring
  • Shimano MT-520 hydraulic 4-piston disc brakes, 203mm rotors
  • X-Fusion Manic dropper post w/ 100/125mm travel
  • Kenda Nevegal 2 29"/27.5" 2.6" TCS folding tires


FrameShift Plus I/O X6 Aluminum frame for Shimano STePS EP-800 | 4-Bar linkage Aluminum Rocker | vertical shock | 160mm travel | Internal Battery | Enduro Bearings
ForkFox Rhythm 36 FLOAT "E" | 29in | 160mm travel | Grip Cartridge | Sweep-Adjuster | 15x110mm Boost axle | Hydraulic Lockout
Frame ShockFox Float X2 | Air shock | Trunnion | 225x75mm | Low Speed Compression & Low-Speed Rebound adjustments
ColorsBlack / Metallic Blue Fade
CranksShimano EP-800 forged | 34T Chainring | 165mm all sizes
ChainKMC e11T | 11-spd | Turbo High Durability
Front DerailleurShimano EP-800 chain guide
Rear DerailleurShimano XT Di2, 11-spd | Shadow Plus
Derailleur ShifterShimano XT Di2 11-spd Switch
Freewheel/CassetteShimano Deore XT M8000 | 11-spd, 11-46T
Drive UnitNew Shimano STePS EP-800 | 85Nm Torque
BatteryDarfon internal 630Wh for sizes M to XL | Shimano STePS Compatible
TiresKenda NEVEGAL 2 29x2.6" Front | 27.5x2.6" Rear | EMC | 60tpi | Aramid beads | Tubeless Compatible
Wheels/RimsWTB ST i35 TCS 2.0 | Tubeless Ready | 29" Front & 27.5" Rear | 40mm wide | Double Wall
HubsHaro Pivit Aluminum disc Boost | E-Bike specific | 32h cassette | Sealed Bearings | Front & Rear Thru-Axle
BrakesShimano BR-MT520 Hydraulic Disc | 4-Piston | 203mm Rotors w/ Integrated Speed-Sensor Magnet
Brake LeversShimano BL-MT501 Hydraulic
Grips/TapeWTB Waffel Single Clamp
HandlebarHaro Pivit Alloy riser bar | 35mm O.D. | 780mm wide | 20mm rise
StemHaro Pivit 3D Forged alloy 35mm | Ext. 35mm
HeadsetFSA Orbit 1.5E ZS No.57E | Internal alloy cups 1-1/8"-1.5" | Bottom AC Bearing | 6mm Top cone
SaddleWTB Volt Comp 150mm Wide
Seat PostX-Fusion Manic 100/125/150mm Dropper post | Horizontal remote | Aluminum 31.6mm
ExtrasCustom motor covers | Tubeless Valves | Darfon Battery charger | Battery Lock


Geometry frame chart
Geometry & Sizing
A. Seat Tube (C-T)394mm (15.5")432mm (17")470mm (18.5")495mm (19.5")
B. Top Tube (Effective)565mm (22.2")599mm (23.6")627mm (24.7")655mm (25.8")
C. Head Tube Angle65°65°65°65°
D. Seat Tube Angle76.5°76.5°76.5°76.5°
E. Chainstay Length450mm (17.7")450mm (17.7")450mm (17.7")450mm (17.7")
F. BB Drop20mm (0.8")20mm (0.8")20mm (0.8")20mm (0.8")
G. Wheelbase1193mm (47")1229mm (48.4")1259mm (49.6")1288mm (50.7")
H. Head Tube Length100mm (3.9")100mm (3.9")110mm (4.3")120mm (4.7")
I. Standover769mm (30.3")784mm (30.9")787mm (31")788mm (31")
J. Stack Height596mm (23.5")627mm (24.7")636mm (25")645mm (25.4")
K. Reach425mm (16.7")450mm (17.7")475mm (18.7")500mm (19.7")
L. Fork Height556mm (21.9")568mm (22.4")568mm (22.4")568mm (22.4")
M. Fork Offset46mm (1.8")51mm (2")51mm (2")51mm (2")
N. Stem Length35mm35mm35mm35mm
O. Bar Width780mm780mm780mm780mm
P. Crank Length165mm165mm165mm165mm

    Need help choosing a size? Read our guide on choosing the right size bike.

    Learn More 

    Purchase your bike online and pickup at your nearest dealer

    Learn More 

    Protect your investment by registering your bike.

    Register now 

Customer Reviews

Based on 2 reviews
Adrian Montgomery
Excellent Value with Premium Finishes

They've been able to pack a ton of value into this bike without cutting corners on the finishing touches. The Darfon battery makes this one of the slimmest downtubes I've ever encountered with a Shimano powerplant and it offers 120 more w/hrs than others. I love the integrated Di2 shifting, the on/off switch tucked neatly on top of the BB shell and the adjacent charging port. Looks clean. Riding a mullet is a little different, but super fun. What a great ride!

Scott M
Dig this ripping machine

I got to demo this bike and feel in love immediately. The rad 29 in front mixed with 27.5 in rear, Shimano Steps, Fox suspension and loooooooong battery life makes this the machine for fun on the dirt. Amazing bike at any price, but for just under $6k made it an easy choice.

*Specifications are subject to change without notice

*Actual retail price may vary based on any added dealer freight, tax, and assembly fees