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Flatbar Redwood
Flatbar Redwood

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Bike Description & Terrain

An amp'd up geometry made to eat up gravel with enough tire to absorb the vibrations of a rutted-rocky trail. Redwood wheels have 27.5" thru-axle/tubeless compatible rims. Allowing a 2.6" tire to clear this frame without issues (tire and rim combos vary). Whether you are on trails most gravel bikes would shudder at or taking in newfound sights on your next bikepacking trip the Redwood is ready.

X Ambition vs Redwood Comparison

Gravel, Single-Track, Bikepacking it does it all.

Gravel, Single-Track, Bikepacking it does it all.

Sizing Specifications

Full Specifications


6061 Double Heat Treated Aluminum (lifetime warranty). Uses an IS 42/52 Headset.

Seat Post

31.6mm Promax Alloy.


Aluminum Tapered Fork with 3 Bosses on Each Side.




MicroShift Advent X


MicroShift Advent X

Handlebars and Stem

Poseidon Flatbars 720mm Wide, 31.8 diameter.
STEM: 31.8 Diameter with +\- 7 Degrees. XXS-M 60mm. Large and XL 70mm


27.5" x 2.35" Kenda Kadre.

Brake Levers

Flatbar Tektro Mechanical Short-pull.


12mm Thru-Axle 32h Tubeless Compatible Rims Laced to Sealed Cartridge Hubs. Internal Rim Width: 26mm. We Recommend 30mm Tubeless Tape. Hub Spacing: 100mm front, 142mm rear. Minimum tire recommendation 650b x 42, Max tire recommendation 27.5 x 2.6. Max tire size can range based on the tread of the tire.

Rear Derailleur

MicroShift Advent X 10 Speed with Clutch

Bottle Cage Boss

2 on the size XXS, 3 on the size XS, Small, & Medium, 4 on the sizes Large & X-Large. Each fork has 3 bosses on each side allowing for 70lbs to be loaded on the fork.


Tektro MD-C550 Mechanical Flat Mount Short-Pull Brake Calipers


Prowheel Charm 170mm Crankset with 38t 104 BCD Narrow-Wide Chainring.

Disc Rotor

160mm Tektro



Bottom Bracket

73 x 110.5 English Threaded Square Taper.


11-48 10-speed Microshift Advent X.

Video Reviews

For the Rugged Adventurer
Perfect for Rough Terrain and Long Trips

The Redwood has a setup that allows it to be capable on terrain meant for a hardtail mountain bike while giving you plenty of rack mounts for multi-day bikepacking trips. This is a great option for someone who is looking for a gravel bike that can go out a little further or a person looking for a do-it-all commuter bike.

Great Speed with Steeper Climbs
A Versatile Bike with Excellent Range

The gearing range is set up for folks looking to get up steep climbs while offering a solid top-end speed. At a moderate cadence the Redwood can generate a top-end speed of about 25-26 mph on flat ground. The Redwood's geometry makes it a great bike for climbing.

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Customer Reviews

Based on 58 reviews
The best bike out there under 1K

i bought by redwood late 2023 it now has over 2,400 miles on it including the GAP & C&O and the eastern divide route from west VA to Florida in winter just got done , this bike can handle just about anything in my open it’s more like a ridged mountain bike , it’s at home on single track , Forest roads no matter how rough , double track and will absolutely bomb pavement down hills , after all that it’s still a amazing bike no issues on the trip other than a broken chain , I did make a few changes for the eastern divide changed the crank , chain ring to 32T , and added the red shift seat post

if you want a bike that can handle it all and not brake the bank look no further the Poseidon redwood is your bike

Dana Cunningham
Love my Redwood

I bought a Flatbar Redwood about 8 months ago and this thing is a monster. I can roll on mild gravel, single track, and I can do most mountain bike things with it. Definitley plan on getting another Poseidon (probably an Ambition X) in the near future. Also, the customer service is top notch!

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About Poseidon Bikes
Dedicated to Quality & Affordable Adventures
Building The Highest-Value Bikes In-House

Discovery doesn't need to be unattainable and Exploration should be something right out your door. We produce our bicycles in a factory we own and operate to ensure you have an affordable price. We're Breaking the Barrier to Discovery and Adventure so you can experience what so many others have done before us.