The 10 best 450mm seat post for 2022

Finding the best 450mm seat post suitable for your needs isnt easy. With hundreds of choices can distract you. Knowing whats bad and whats good can be something of a minefield. In this article, weve done the hard work for you.

Product	Features	Editor's score	Go to site
	UPANBIKE Bike Bicycle Seatpost MTB Replacement Extra Long 17.7inch (450mm) Seat Post 25.4mm		Go to amazon.com
	CYSKY 25.4 SeatPost 350mm Bike Seat Post Suitable for Most Bicycle Mountain Bike Road Bike MTB MTN BMX (Aluminum Alloy, Adjustable, Black)		Go to amazon.com
	Jili Online Extra Long 450mm Seatpin Seatpost 25.4/27.2/28.6/30.4/30.8/31.6x450mm for MTB Road Mountain Bike - Black, B		Go to amazon.com
	Sunlite Alloy Pilar Seat Post, 27.2 x 350mm, Black		Go to amazon.com
	Cane Creek Thudbuster LT 27,2 mm black (Length: 450 mm) suspension seat posts		Go to amazon.com
	Whool 31.6 450mm 580mm MTB Mountain Bikes Road Bicycles Ultra Long Seat Post Sit Tube Parts (31.6580mm)		Go to amazon.com
	FCFB FW red 0 mm seatpost carbon fibre bike seatpost bike parts 27.2/30.8/31.6*350/400/450mm road bike mountain bike seat post (27.2*450mm)		Go to amazon.com
	FOMTOR Bicycle Seat Post 30.8 x 450mm Alumium Long Seatpost for MTB Road Bike BMX (Adjustable, Black)		Go to amazon.com
	MagiDeal Bicycle Seatpost Frosted 25.4/27.2/28.6/30.4/30.8/31.6x450mm Mountain Road Aluminium Alloy Bicycle Seatpost MTB Bike Parts - Black, A		Go to amazon.com
	OneUp Components Dropper Post Black, 30.9x450mm/170mm		Go to amazon.com

Related posts:

Reviews

1. UPANBIKE Bike Bicycle Seatpost MTB Replacement Extra Long 17.7inch (450mm) Seat Post 25.4mm

Feature

To fit frame seatpost hole: 25.4mm, 27.2mm,28.6mm,30.4mm,30.8mm,31.6mm
Important note: real measure of the seatpost diameter is a little smaller than the number marks on it. e.g.:25.4mm one may measures about 25.0~25.2mm only
Extra long: 17.7" (45cm); Help to raise height of saddle, so that tall rider don't have to bent much forward
Replacement seatpost for most bike, mountain bike, road bike, universal bikes
Clamp is adjustable for the saddle tilt angle

Description

Note: The diameter number is for frame seatpost hole, the seatpost measures a little smaller than the diameter number marked on the seatpost. e.g.: a 25.4mm seatpost measures about 25.0mm~25.2mm only, not exactly 25.4mm.
Replacement Seatpost, extended extra long length.
Material : 6061 T6 Aluminum
Length: 450mm
Tube Outter diameter: 25.4mm, 27.2mm,28.6mm,30.4mm,30.8mm,31.6mm
Package includes: 1 seatpost

2. CYSKY 25.4 SeatPost 350mm Bike Seat Post Suitable for Most Bicycle Mountain Bike Road Bike MTB MTN BMX (Aluminum Alloy, Adjustable, Black)

Feature

Size: 25.4 350mm (apx 305g/pc), Total length: 350mm, Tube Length: 325mm, Head Length: 25mm.Strength: 4.9 levels ultra high strength, maxium of 580lbs ; Setback: 20mm. Adjust tube length of 0 to 320mm
How to Choose the Size:1.Check the diameter of the original seatpost,choose the same size as the original diameter.2.Measure the inside diameter of the frame tube.
Constructed of ultra light and strong 6061 T6 aluminum alloy. Light weight, never rust
Suitable for most road bike, fixed gear bicycle, mountain bikes, downhill bike, track bike, MTB, BMX, DH, etc
With adjustable head, Easy to install. Frosting finish, exquisite workmanship, nice touch feeling

Description

Note: Pls choose the right size
Note: Pls choose the right size

Q: How to determine which seat post will fit my bike?
Note: Pls choose the right size

Q: How to determine which seat post will fit my bike?
A: Measure your post with calipers for diameter, Measure your old seat post length, select your new seat post length. If you don't have measure tool, you could measure the outside diameter of the seat tube with a ruler, and caculate the diameter of your old post.

Specification:
Size: 25.4 350mm (apx 305g/pc)
Diameter: 25.4mm (apx 1 inch)
Total length: 350mm (13.7inch), Tube Length: 325mm (12.8inch), Head Length: 25mm (0.9inch)
Strength: 4.9 levels ultra high strength, maxium of 580lbs
Setback: 20mm
Adjust tube length: 0-320mm
Use: mountain bike, track bike, fixed gear, road bike and so on

Package Include:
1 * Bike Seatpost

FAQ:
Q: what is diameter of this seat post?
A: 25.4mm

Q: How much is the setback of this seat post?
A: 20mm

Q: Does this come with the seat clamp?
A: Yes

Q: Is it possible to adjust the seat angle with this seatpost?
A: Yes. The top bracket is adjustable so you can slide the seat trails forward and backward as well as adjust the tilt of the seat.

ADD The Bike Seat Post to Your Cart, Enjoy The Rides

3. Jili Online Extra Long 450mm Seatpin Seatpost 25.4/27.2/28.6/30.4/30.8/31.6x450mm for MTB Road Mountain Bike - Black, B

Feature

Constructed of ultra light and strong 6061 aluminum alloy.
Thickened pipe wall.
Frosted surface, exquisite workmanship, nice touch feeling.
With adjustable head, convenient to install.
Suitable for road and mountain bike.

Description

Description:

- Constructed of ultra light and strong 6061 aluminum alloy.

- Thickened pipe wall.

- Frosted surface, exquisite workmanship, nice touch feeling.

- With adjustable head, convenient to install.

- Suitable for road and mountain bike.

Specification:

- Material: 6061 Aluminum Alloy

- Color: Black

Size Chart:

A: Approx. 25.4 x 450mm/1 x 17.7inch

B: Approx. 27.2 x 450mm/1.07 x 17.7inch

C: Approx. 28.6 x 450mm/1.13 x 17.7inch

D: Approx. 30.4 x 450mm/1.20 x 17.7inch

E: Approx. 30.8 x 450mm/1.21 x 17.7inch

F: Approx. 31.6 x 450mm/1.24 x 17.7inch

Package Includes:

1 Piece Bicycle Seatpost

4. Sunlite Alloy Pilar Seat Post, 27.2 x 350mm, Black

Feature

Forged alloy construction
Pillar style design
Sunlite Alloy Pillar Seat Post 27.2x350 Bike
Weight lb. (0 kg)
Model Number 52092

Description

Pillar style design

5. Cane Creek Thudbuster LT 27,2 mm black (Length: 450 mm) suspension seat posts

Feature

Saddle pin-System: saddlepost with spring
Material: Aluminium
Size-Suspension: 76mm - 76mm

Description

• Saddle pin:
• System: saddlepost with spring

• Material: Aluminium

• Size:
• Diameter: 27.2 mm
• Suspension: 76 mm

6. Whool 31.6 450mm 580mm MTB Mountain Bikes Road Bicycles Ultra Long Seat Post Sit Tube Parts (31.6580mm)

Feature

Weight : 450mm 415g 580mm 491g
Material: Aluminum Alloy

Description

Size : 31.6*450mm 31.6*580mm Weight : 450mm 415g 580mm 491g Material : Aluminum alloy

7. FCFB FW red 0 mm seatpost carbon fibre bike seatpost bike parts 27.2/30.8/31.6*350/400/450mm road bike mountain bike seat post (27.2*450mm)

Feature

diameter 27.2/30.8/31.6mm
lenght 350/400/450mm
3K full carbon road bike mountain bike seatpost
Ultra light, high-strong, non-deformable, corrosion resistant etc
weight 27.2*450mm 250g

8. FOMTOR Bicycle Seat Post 30.8 x 450mm Alumium Long Seatpost for MTB Road Bike BMX (Adjustable, Black)

Feature

Made of High quality 6061 aluminium alloy.Light weight,never rust.Strength: 4.9 levels ultra high strength, maxium of 580lbs.
Diameter:30.8mm.Length:450mm.Setback: 20mm. Adjust tube length of 0 to 420mm.
How to Choose the Size:1.Check the diameter of the original seatpost,choose the same size as the original diameter.2.Measure the inside diameter of the frame tube.
With adjustable head, convenient to install.
Suitable for most mountain bikes, road bike, fixed gear bicycle, downhill bike, track bike, MTB, BMX, DH, etc

Description

Specification:

Diameter:30.8 mm
Length:450mm
Weight:390g
Strength: 4.9 levels ultra high strength, maxium of 580lbs
Adjust tube length: 0-320mm
Use: MTB, BMX, mountain bike, track bike, fixed gear, road bike and so on

How to choose the seatpost size:

1.Check the diameter of the original seatpost,choose the same size as the original diameter.
2.Measure the inside diameter of the frame tube.choose the same size as the inside diameter of the frame tube.

Package Include:

1 x 30.8 Bicycle Seat Post(Length:450mm)

9. MagiDeal Bicycle Seatpost Frosted 25.4/27.2/28.6/30.4/30.8/31.6x450mm Mountain Road Aluminium Alloy Bicycle Seatpost MTB Bike Parts - Black, A

Feature

Constructed of ultra light and strong 6061 aluminum alloy.
Thickened pipe wall.
Frosted surface, exquisite workmanship, nice touch feeling.
With adjustable head, convenient to install.
Suitable for road and mountain bike.

Description

Description:

- Constructed of ultra light and strong 6061 aluminum alloy.

- Thickened pipe wall.

- Frosted surface, exquisite workmanship, nice touch feeling.

- With adjustable head, convenient to install.

- Suitable for road and mountain bike.

Specification:

- Material: 6061 Aluminum Alloy

- Color: Black

Size Chart:

A: Approx. 25.4 x 450mm/1 x 17.7inch

B: Approx. 27.2 x 450mm/1.07 x 17.7inch

C: Approx. 28.6 x 450mm/1.13 x 17.7inch

D: Approx. 30.4 x 450mm/1.20 x 17.7inch

E: Approx. 30.8 x 450mm/1.21 x 17.7inch

F: Approx. 31.6 x 450mm/1.24 x 17.7inch

Package Includes:

1 Piece Bicycle Seatpost

10. OneUp Components Dropper Post Black, 30.9x450mm/170mm

Feature

Diameter: 30.9mm, 31.6mm
Length: [150mm travel] 410mm, [170mm travel] 450mm
Travel: 150 mm, 170 mm
Dropper: yes, infinitely adjustable
Claimed Weight: [30.9mm, 150mm travel] 509g, [30.9mm, 170mm travel] 545g, [31.6mm, 150mm travel] 530g, [31.6mm, 170mm travel] 565g, [housing and cable] 53g

Description

OneUp Components realizes that it's difficult to get the most drop from a traditional dropper post, due to wasted space inherent to popular droppers on the market, as well as things like interrupted seat tubes found on many frame designs. That's why OneUp Components created their Dropper Post to offer the absolute shortest stack height of any dropper on the market, period. OneUp's shorter dropper allows you to size up to their 150-millimeter option if you're currently using a 125-millimeter dropper or a lengthy 170-millimeter option if you're currently running a 150-millimeter dropper on your bike. This way, you can get in a lower, more aggressive position while descending without any undropped post sticking above your seat tube, preventing you from going lower off the rear end of your bike. Not only is it the absolute shortest dropper post on the market, but OneUp offers a unique, travel-adjust shim that's 50 millimeters in length and trims down to your personalized needs, so you don't have to size down in dropper length if you're between sizes. This means you can achieve that 143. 5 millimeters of drop with the 150-millimeter option or achieve 158 millimeters of drop with the 170-millimeter option by OneUp, making it a truly personalized dropper, seeing your physiology doesn't usually conform to rounded numbers. For the dropper's operation, the OneUp Dropper Post uses a reliable cable-actuated that doesn't require bleeding to deliver smooth drops and speedy returns--though do note that the lever isn't included. Since the cable clamps at the lever, trimming it down for cable routing is a breeze. And since it's not a hydraulic dropper like some of the competition, it won't slow down or stick in those colder temperatures regularly experienced at higher elevations.

Conclusion

All above are our suggestions for 450mm seat post. This might not suit you, so we prefer that you read all detail information also customer reviews to choose yours. Please also help to share your experience when using 450mm seat post with us by comment in this post. Thank you!