Upanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)
Upanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)
Hero image 0 of Upanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm), 0 of 3

Upanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)

4.7 stars out of 27 reviews
(4.7)|
27 ratings

Key item features

  • Frame Compatibility: To fit frame seatpost hole: 30.4mm.
  • Material & Weight: Made from 6061 T6 Aluminum alloy, weighing approximately 380g.
  • Extra Length: Extra-long 17.7 inches (450mm) helps tall riders avoid bending too much forward.
  • Adjustable Clamp: Clamp is adjustable for the saddle tilt angle.
  • Diameter Options: Available in diameters 25.4/27.2/28.6/30.4/30.9/31.6mm.
  • Installation Tip: Insert the post into the bike frame hole and lock the seatpost clamp before turning the fixing bolt with a hexagon screwdriver.
  • Weight Limit: Not recommended to exceed 220 lbs (100kg) on this seatpost.
  • Measurement Guide: Measure the exact post diameter needed for your bike to ensure proper fit.
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Current price is $16.99
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4.32015306122449 stars out of 5, based on 784 seller reviews(4.3)
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Upanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)
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Comparison Chart:
Bicycle seatpost typeBicycle SeatpostUpanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)Bicycle Seatpost25.4x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat Post-UPANBIKE Aluminum Alloy Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost(?25.4mm)Bicycle Seatpost28.6x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat PostBicycle SeatpostKALLORY Black Aluminum Alloy Adjustable Dropper Seat Post for Mountain Bikes Cycling AccessoriesBicycle SeatpostYSNOOWE Road Bike Seatpost 1Pcs Black Aluminum Alloy for 30.8mm-Bicycle Seatpost 300mm Mountain Bike Seat Tube Aluminum Alloy Integrate Seatpost 25.4 27.2 28.6 30.4 30.8 31.6mm MTB Saddle PostBicycle SeatpostKCAHPAN Bicycles Seatpost Steel 25.4mm Extender Length for Seats Post Great Performances
MaterialAluminum alloyUpanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)Aluminum Alloy25.4x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat PostAluminum alloyUPANBIKE Aluminum Alloy Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost(?25.4mm)Aluminum Alloy28.6x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat Postaluminum alloyKALLORY Black Aluminum Alloy Adjustable Dropper Seat Post for Mountain Bikes Cycling Accessoriescarbon fiberYSNOOWE Road Bike Seatpost 1Pcs Black Aluminum Alloy for 30.8mmPlastic, metalBicycle Seatpost 300mm Mountain Bike Seat Tube Aluminum Alloy Integrate Seatpost 25.4 27.2 28.6 30.4 30.8 31.6mm MTB Saddle PostKCAHPAN Bicycles Seatpost Steel 25.4mm Extender Length for Seats Post Great Performances
ColorBlackUpanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)Black25.4x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat PostBlack 25.4 x 350mmUPANBIKE Aluminum Alloy Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost(?25.4mm)Black28.6x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat PostBlackKALLORY Black Aluminum Alloy Adjustable Dropper Seat Post for Mountain Bikes Cycling AccessoriesBlackYSNOOWE Road Bike Seatpost 1Pcs Black Aluminum Alloy for 30.8mm25.4*300Bicycle Seatpost 300mm Mountain Bike Seat Tube Aluminum Alloy Integrate Seatpost 25.4 27.2 28.6 30.4 30.8 31.6mm MTB Saddle PostBlackKCAHPAN Bicycles Seatpost Steel 25.4mm Extender Length for Seats Post Great Performances
Weight1 lbUpanbike Bike Seat Post Diameter 25.4/27.2/28.6/30.4/30.9/31.6mm Extra Long 17.7inch Aluminum Alloy Bicycle Seatpost (Φ30.4mm)0.52 lb25.4x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat Post200 gUPANBIKE Aluminum Alloy Bike Seat Post Length 350mm Black for Mountain Bike Fixed Gear Bike Seatpost(?25.4mm)-28.6x300mm Seatposts Aluminum Alloy Lengthened Tube Rod Road Bike Accessories Bicycle Seat Post0.76 lbKALLORY Black Aluminum Alloy Adjustable Dropper Seat Post for Mountain Bikes Cycling Accessories0.71 lbYSNOOWE Road Bike Seatpost 1Pcs Black Aluminum Alloy for 30.8mm0.59 lbBicycle Seatpost 300mm Mountain Bike Seat Tube Aluminum Alloy Integrate Seatpost 25.4 27.2 28.6 30.4 30.8 31.6mm MTB Saddle Post-KCAHPAN Bicycles Seatpost Steel 25.4mm Extender Length for Seats Post Great Performances
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4.7 out of 5 stars
stars27 ratings10 reviews
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Showing 1-3 of 10 reviews

Aug 8, 2025
anonymous
Item details
Size: 450*30.8mm
Sold byAbuyamoyDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Good post for MTB

Make sure you order the correct size, that's the most important. Quality was very good for the price, maybe it wasn't the quality of the original post, but I'm sure that one cost a lot more. This product was well worth the price, it fit perfect and installing the seat on this new post was easy (make sure it's tight) and works perfectly. Totally replaced the original but much longer like I needed.

Helpful?3TTMG51TB4DY886448899
Apr 12, 2025
CMM
Top Reviewer
Item details
Size: 450*27.2mm
Sold byAbuyamoyDelivered byWalmart
5 out of 5 stars review

Verified Purchase

It fit my bike

be sure to measure your diameter of your old one because I end up with the wrong one and had to order this one

Helpful?3TTMG51TB4DY886448899
Oct 15, 2024
rita
Item details
Size: 450*25.4mm
Sold byAbuyamoyDelivered byWalmart
5 out of 5 stars review

Verified Purchase

quality post

this is a solid seatpost. i really don't have any negatives. bought a second for another bike. factory posts too short and heavy

Incentivized Review
Helpful?3TTMG51TB4DY886448899