---
product_id: 654797756
title: "P6 Carbon HiFlex Seatpost"
brand: "syntace"
price: "$7.11"
currency: USD
in_stock: false
reviews_count: 8
url: https://www.desertcart.us/products/654797756-p6-carbon-hiflex-seatpost
store_origin: US
region: United States of America
---

# Diameter: 27.2-34.9mm Material: Carbon Fiber Weight: 220-238g P6 Carbon HiFlex Seatpost

**Brand:** syntace
**Price:** $7.11
**Availability:** ❌ Out of Stock

## Summary

> 🚴‍♂️ Elevate Your Ride with the P6 Carbon HiFlex Seatpost!

## Quick Answers

- **What is this?** P6 Carbon HiFlex Seatpost by syntace
- **How much does it cost?** $7.11 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/654797756-p6-carbon-hiflex-seatpost)

## Best For

- syntace enthusiasts

## Why This Product

- Trusted syntace brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Sizing:** Available in multiple diameters (27.2mm to 34.9mm) to fit your unique bike setup.
- • **Durable Carbon Fiber:** Crafted from high-quality carbon fiber for unmatched strength and flexibility.
- • **Optimal Length Options:** Choose from various lengths (300mm to 480mm) to customize your riding experience.
- • **Designed for All Riders:** Perfect for both road cycling and mountain biking enthusiasts.
- • **Lightweight Performance:** Experience the thrill of a feather-light ride with weights starting at just 220g!

## Overview

The P6 Carbon HiFlex Seatpost by Syntace is a high-performance cycling component designed for both road and mountain biking. Weighing between 220g and 238g, it offers a range of diameters (27.2mm to 34.9mm) and lengths (300mm to 480mm), ensuring a perfect fit for any bike. Made from durable carbon fiber, this seatpost combines lightweight design with exceptional strength, making it an essential upgrade for serious cyclists.

## Description

Syntace's P6 Carbon HiFlex is not a shock absorbing seatpost. It is a carbon seatpost that is designed to gently dampen the effects of rough roads or rutted trails, which, in turn, lets you focus on using your legs to put power to the pedals. For the P6, Syntace arranged carbon fibers in such a manner that the seatpost is able to flex backwards under load, which increases a rider's comfort without any sideways movement. The benefit is that the post takes the edge off of the bumps on your road bike. If you're on your mountain bike, conventional seatposts and saddles force you to lift your weight slightly from the perch to minimize bumps. This means you're hovering instead of standing or sitting, which is a tiring position to ride in. Using the P6 HiFlex, however, you're able to remain seated over ruts in the trail, letting your legs push the pedals rather than holding you off the saddle. The HiFlex also features an integrated carbon head. It uses cold-forged alloy (7075) lower rail plates and deep-head titanium bolts to give 30 degrees of saddle tilt, plus maximum rail support. The Syntace P6 Carbon HiFlex is available in the sizes 27. 2/400mm, 30. 9/300mm, 30. 9/400mm, 31. 6/300mm, 31. 6/400mm, and 34. 9/480mm.

## Features

- Claimed Weight: [27.2] 231 g, [30.9] 220 g, [31.6] 220 g, [34.9] 238 g
- Diameter: 27.2 mm, 30.9 mm, 31.6 mm, 34.9 mm
- Length: [27.2] 400 mm, [30.9] 300 mm, [30.9] 400 mm, [31.6] 300 mm, [31.6] 400 mm, [34.9] 480 mm
- Material: carbon fiber
- Recommended Use: road cycling, mountain biking

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Package Dimensions L x W x H | 19.3 x 2.6 x 2.2 inches |
| Package Weight | 7.2 ounces |
| Item Dimensions  LxWxH | 21 x 4 x 3 inches |
| Brand Name | Syntace |
| Manufacturer | Syntace |
| Part Number | 104082 |
| Model Year | 2015 |
| Size | 34.9/480mm |

## Images

![P6 Carbon HiFlex Seatpost - Image 1](https://m.media-amazon.com/images/I/61lepN2MclL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Great Seat Post!
  

*by J***T on Reviewed in the United States on February 22, 2013*

This is my second Syntace Full Carbon P6 Hi-Flex Seat Post.It is fairly light, but mostly 'tough' works well with carbon railed saddles (some seat posts do not), has a long andsupportive clamp design that has a lot of adjustment.The flex (combined with a light carbon-railed saddle) works well (as long as you have several inches of seat-postabove the seat tube clamp) work well and you can feel it. I use a version on my non-suspension 'fat-tired' bike, andmy high-end Moots RSL road bike.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Best Post I have ever owned
  

*by J***R on Reviewed in the United States on August 20, 2015*

I have been riding on this seatpost for 4 months now and it is exactly as advertised!  I ride a steel single speed hard tail so the flex the Syntace offers is welcomed on the trail.  Another plus was bolting my saddle to the seatpost, very simple.  Also the post has not slipped since it was installed, no matter the rocks or roots on the trail the seatpost stays put.

### ⭐⭐⭐ 3.0 out of 5 stars







  
  
    Keep your expectations in check!
  

*by P***D on Reviewed in the United States on December 3, 2017*

Some reviews make it sound like this thing will flex like a Thudbuster.  On the other hand, another reviewer said it is all a scam and it doesn't flex at all.  Well, the truth is in-between, its flex is subtle.  If you hold it in your hand, you wouldn't know it is supposed to be a flexing post.  It feels totally stiff and solid.  So, if you are looking for something like a Thudbuster, then you better look for a Thudbuster.  If you want a light carbon seatpost that takes some of the shock out of bumps, then this might be for you.It fit REALLY tight in my bike's tube, a Trek aluminum bike.  I used some Park Tool assembly compound.  I had to put my seat on the post so that I could then use the seat for leverage to twist and push to get the post inserted!  Someone I think said they had problems with their bike tube scratching the seatpost because it was so tight and recommended putting a chamfered edge on the tube.  But my bike already had that from the factory and I didn't have any scratching problems.  But it sure was tight!I like the seat angle adjustment mechanism.  Seems to work well.  It is a solid post.  It is light.  It works.  It doesn't do miracles though.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-21*