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The Poseidon FLATBAR X, Flatbar Shadow Redwood, and Flatbar Green Redwood are all aluminum frame gravel bikes with upper mid-range components and mechanical disc brakes. The FLATBAR X has a carbon fork, 700c wheels, and higher gearing. Explore the differences below.

2021 Poseidon FLATBAR X
2021 Poseidon Flatbar Shadow Redwood
2021 Poseidon Flatbar Green Redwood
MSRP$649$879$879
Online Price
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CategoryGravelGravelGravel
Weight24.0 lbs
FrameAluminumAluminumAluminum
ForkCarbonAluminumAluminum
Wheel Size700c650b650b
Wheel MaterialAluminumAluminum
Brake TypeMechanical DiscMechanical DiscMechanical Disc
GroupsetmicroSHIFT Advent X
microSHIFT Advent X
microSHIFT Advent X
Drivetrain1 × 101 × 101 × 10
Gear Range

Poseidon FLATBAR X

30 mph

Poseidon Flatbar Shadow Redwood

28 mph

Poseidon Flatbar Green Redwood

28 mph
SeatpostRigidRigidRigid
Brand Siteposeidonbike.composeidonbike.composeidonbike.com
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Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$200$400$600$800
FLATBAR X
Flatbar Shadow Redwood
Flatbar Green Redwood

Geometry

Specs
Frame

6061 Double Butted Hydroformed Aluminum

6061 Double Butted Hydroformed Aluminum

6061 Double Butted Hydroformed Aluminum

Fork

Full Carbon fork – Tapered 1 1/8" – 1 1/2"

6061 Aluminum Fork – Tapered Steer 1 1/8" – 1 1/2"

6061 Aluminum Fork – Tapered Steer 1 1/8" – 1 1/2"

Bottom Bracket

68mm English Threaded Square Taper

73mm English Threaded Square Taper

73mm English Threaded Square Taper

Handlebar

Poseidon Flatbars 720mm Wide with 6d Sweep

Poseidon Flatbar

Poseidon Flatbar

Saddle

Poseidon X alloy rails

Poseidon X alloy rails

Seatpost

Poseidon X Alloy 27.2

Promax Alloy 31.6

Promax Alloy 31.6

Pedals

Platform Pedals

Platform Pedals

Platform Pedals

Groupset
Rear Derailleur

MicroShift Advent X with Clutch

MicroShift Advent X 10 Speed with Clutch

MicroShift Advent X 10 Speed with Clutch

Crank

Prowheel 38t Narrow Wide Chainring 1x Crankset

Prowheel 38t Narrow Wide Crank

Prowheel 38t Narrow Wide Crank

Shifters

MicroShift Advent X

MicroShift Advent X 10 Speed

MicroShift Advent X 10 Speed

Cassette

Microshift 11-48T Advent X 10 Speed

Microshift 11-48T Advent X 10 Speed

Microshift 11-48T Advent X 10 Speed

Chain

KMC 10 Speed

KMC 10 Speed

Brakes

Tektro Mechanical Disc Mechanical Disc

Tektro MD-C550 Mechanical Flat Mount Brake Calipers

Tektro MD-C550 Mechanical Flat Mount Brake Calipers

Brake Levers

Tektro Flatbar Levers

Tektro Flatbar Levers

Tektro Flatbar Levers

Wheels
Rims

Poseidon Alloy Tubeless Compatible 27.5” Wheels, 12x100 Thru axle front & 12x142 Thru axle rear

Poseidon Alloy Tubeless Compatible 27.5” Wheels, 12x100 Thru axle front & 12x142 Thru axle rear

Tires

Kenda Small Block 700x35. Bike can handle up to a 700x40 tire with clearance for mud. 650b compatible with up to a 1.9" wide tire.

Kenda Kadre 27.5 x 2.35 Clincher tires

Kenda Kadre 27.5 x 2.35 Clincher tires

Disk Rotors

Tektro 160mm

Tektro 160mm F&R

Tektro 160mm F&R