Suspension Seatpost for 30.9mm Frames, 350mm 27.2mm Alloy Post with Shim, 42mm Travel
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More Ride Comfort for Bikes with 30.9 mm Seat Tubes
This suspension seatpost for 30.9 mm bike frames combines a 27.2 mm suspension post with an included shim adaptor. The shim increases the effective fitting diameter to 30.9 mm, making the combination suitable for compatible commuter, hybrid, gravel and recreational bikes.
The coil-spring system provides 42 mm of travel to help absorb impacts from rough roads, gravel and uneven cycle paths. You can also adjust the spring tension through the hex bolt at the bottom of the post to suit the rider and riding conditions.
Key Features
- Includes a 27.2 mm suspension seatpost and a 27.2-to-30.9 mm shim adaptor.
- Fits compatible bike frames with a 30.9 mm internal seat tube diameter when used with the included shim.
- Provides 42 mm of coil-spring suspension travel.
- Features adjustable spring tension through the hex bolt at the base.
- Uses a 6061 aluminium alloy post to keep the construction strong without excessive weight.
- Suitable for commuting, gravel riding and light recreational trail use.
- Includes a protective cover around the suspension mechanism.
Suspension Seatpost Product Specifications
- Seatpost diameter: 27.2 mm.
- Diameter with included shim: 30.9 mm.
- Total seatpost length: 350 mm.
- Suspension travel: 42 mm.
- Damping method: Coil spring.
- Seatpost material: 6061 aluminium alloy.
- Seatpost weight: 388 g ±5%.
- Minimum insertion depth: 100 mm.
- Maximum insertion depth: 260 mm.
- Saddle mount area diameter: 22 mm.
- Seatpost model: PENGBO-272-350.
- Shim size: 27.2 mm to 30.9 mm.
- Shim material: Alloy.
- Shim length: 59 mm.
- Shim weight: 25 g.
- Saddle rail clamp: Not included.
Benefits of this Suspension Seatpost
- The suspension mechanism softens impacts from potholes, gravel and uneven paths.
- The included shim allows a 27.2 mm post to fit a compatible 30.9 mm bike frame.
- Adjustable spring tension lets you change the suspension response for the rider and route.
- The 350 mm length provides a practical replacement option for many commuter, hybrid and recreational bikes.
- The replaceable shim gives you more flexibility than a seatpost made only for one frame diameter.
Common Questions
- Q: Is the seatpost itself 30.9 mm?
A: No. The suspension post has a 27.2 mm diameter. The included shim increases the fitting diameter so it can be installed in a compatible 30.9 mm seat tube. - Q: How do I check whether it will fit my bike?
A: Remove your existing seatpost and check its engraved diameter or measure it accurately with a vernier caliper. Your bike must use a 30.9 mm internal seat tube diameter for this post-and-shim combination. - Q: Does it include the saddle rail clamp?
A: No. The post has a 22 mm saddle mount area, but you will need a separate compatible clamp for attaching standard saddle rails. - Q: Can I adjust the suspension?
A: Yes. Use the hex adjustment point at the bottom of the seatpost to alter the coil-spring tension. - Q: How much of the post must go inside the frame?
A: Insert at least 100 mm of the post into the bike frame. The maximum stated insertion depth is 260 mm. - Q: Is it suitable for mountain biking?
A: It is suitable for commuting, gravel riding and light recreational trails. Check that the post, shim and saddle mounting system are secure before riding.
Summary
This suspension seatpost 30.9 mm fit combination offers a practical way to add spring suspension to a bike with a compatible 30.9 mm seat tube. It includes a 350 mm long 27.2 mm alloy post, a correctly sized shim and 42 mm of adjustable coil-spring travel. It is a useful option for riders who want extra comfort on everyday New Zealand roads, gravel routes and cycle paths.
