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"This is a solid post"
"Also new are travel reduction spacers available in 10 or 30 mm sizes… an easy fix to tune fit without swapping posts. Installing is very easy.” [Issue 208]
"I haven't tried anything that's better than the Line."
"If you hate side-to-side saddle slop you will be thoroughly impressed by the Line post."
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"No hesitation on cold days and it's easy to service"
"I absolutely LOVE the way the cable end attaches at the post instead of having the metal cable stop that you have to adjust and will lose someday" - Jcooch from Manchester, CT
5/5 stars
"Awesome. It is so much more solid going down hills" - DMc from St. Paul, MN
All your favorites, all in one place
Get all your favorite apparel from over 80 of the world's best cycling brands delivered right to your doorstep or local Trek retailer when you shop our curated online collection. If you're not 100% satisfied, you can return your purchase within 30 days for a full refund.
Shop all gearBorn in a barn
Get an inside look at how the company got its' name, why it decided to start it's life in a barn, and more!
Read moreGo By Bike
Planet Earth is our home and our responsibility —we must do our part to preserve it. Learn how you can join the #GoByBike movement and help make a difference in the future of our planet and all who call it home.
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Wondering how to properly fit that new helmet you just got? Need some tips on how to ride with your kids? How about ways to be more visible to cars? We've got that and a whole bunch more!
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Trek culture is who we are, what matters to us, and what we do as a brand. Take a look behind the scenes at Trek’s global headquarters.
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There's a lot more to Trek than making the world's best bikes and cycling gear. Learn more about everything Trek is doing to make the cycling space safer, more inclusive, plus a whole lot more fun.
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Sizing and fit
Click “Learn More” to dive into the details and ensure you get the right size seatpost that will work with your frame and fit needs.
30-Day Unconditional Guarantee
If for any reason you're not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.
Learn more| Size | 31.6mm x 350mm x 100mm | 31.6mm x 395mm x 125mm | 31.6mm x 445mm x 150mm |
|---|---|---|---|
| Diameter | 31.6mm | 31.6mm | 31.6mm |
| Length | 350mm | 395mm | 445mm |
| Travel | 100mm | 125mm | 150mm |
| Seatpost type | Dropper posts | Dropper posts | Dropper posts |
| Offset | 0mm | 0mm | 0mm |
| Rail compatibility | Universal | Universal | Universal |
| Material | Aluminum | Aluminum | Aluminum |
| Weight | 540g | 565g | 590g |