EC90 SL ISA Seatpost EC90 SL ISA Seatpost

SP20EC90SL27.2X350X0MMBLK

In stock

$269.99

The newly redesigned EC90 SL ISA Seatpost takes our superlight unidirectional carbon and applies our patent pending Independent Saddle Adjustment, allowing for perfect fitment with independent seat angle and fore-aft movement. ISA allows you to refine your positioning without needing to undo your rail clamps for each minute tweak. Saddle angle is then locked in place so you have the confidence your saddle will stay put after you find your fit. Available in Zero and 20mm offset, and coming in at 195g, the new EC90 SL ensures a secure fit and a super light upgrade for your dream build.


Easton is also happy to introduce our 27.2 Di2 Battery Insert for use with all ISA 27.2 seatposts.

Lifetime Warranty

The newly redesigned EC90 SL ISA Seatpost takes our superlight unidirectional carbon and applies our patent pending Independent Saddle Adjustment, allowing for perfect fitment with independent seat angle and fore-aft movement. ISA allows you to refine your positioning without needing to undo your rail clamps for each minute tweak. Saddle angle is then locked in place so you have the confidence your saddle will stay put after you find your fit. Available in Zero and 20mm offset, and coming in at 195g, the new EC90 SL ensures a secure fit and a super light upgrade for your dream build.


Easton is also happy to introduce our 27.2 Di2 Battery Insert for use with all ISA 27.2 seatposts.

Lifetime Warranty



Shipping Policy

FREE SHIPPING ON ORDERS OVER $100
Nice and easy, you wont pay for shipping on any order over $100.

$15 FLAT RATE SHIPPING
For all orders under $100, you'll only pay $15 to ship anything on our site anywhere! Please note we cannot ship to P.O. Boxes or APO/FPO addresses. Typically orders will take 1-2 business days to prepare and another 3-7 days to arrive at your address. Of course we try to ship as fast as possible so you're on your bike faster!

Returns & Exchanges

30 Day Returns
Got the wrong size? don't like the colour? no problem, we accept returns up to 30 days from you receiving it. All product must be in new, uninstalled condition with the original packaging intact. To set up a return click here and fill out an RA request form and a customer service rep will reply with instructions to return it.



Shipping Policy

FREE SHIPPING ON ORDERS OVER $100
Nice and easy, you wont pay for shipping on any order over $100.

$15 FLAT RATE SHIPPING
For all orders under $100, you'll only pay $15 to ship anything on our site anywhere! Please note we cannot ship to P.O. Boxes or APO/FPO addresses. Typically orders will take 1-2 business days to prepare and another 3-7 days to arrive at your address. Of course we try to ship as fast as possible so you're on your bike faster!

Returns & Exchanges

30 Day Returns
Got the wrong size? don't like the colour? no problem, we accept returns up to 30 days from you receiving it. All product must be in new, uninstalled condition with the original packaging intact. To set up a return click here and fill out an RA request form and a customer service rep will reply with instructions to return it.

  • EC90 Carbon mast with full carbon head
  • ISA - Patent pending Independent Saddle Adjustment
  • Taperwall technology

  • EC90 Carbon mast with full carbon head
  • ISA - Patent pending Independent Saddle Adjustment
  • Taperwall technology

SEATPOST WEIGHT: ZERO - 195g, SETBACK - 200g
FINISH: MATTE BLACK UD CARBON
HEAD OFFSET: 0mm, 20mm
LENGTH: 350mm WITH 80mm MIN INSERT
QUILL SIZES: 27.2mm
MATERIAL: EC90 CARBON

SEATPOST WEIGHT: ZERO - 195g, SETBACK - 200g
FINISH: MATTE BLACK UD CARBON
HEAD OFFSET: 0mm, 20mm
LENGTH: 350mm WITH 80mm MIN INSERT
QUILL SIZES: 27.2mm
MATERIAL: EC90 CARBON

ISA Post Installation

ISA Post Installation