Teravail

Stratum Alloy Seatpost - 18mm Offset

Teravail Stratum Alloy Seatpost in 18mm offset is a clean, durable fit solution for road, gravel, and mountain builds where saddle setback and repeatable adjustability matter. Built from 6066 aluminum with a forged alloy head, it delivers dependable strength with a straightforward two-bolt clamp that makes it easy to fine-tune saddle angle and fore-aft position without drama.

• 18mm offset (setback) - Helps riders achieve proper fit and weight balance when a zero-offset post won’t place the saddle far enough back
• Two-bolt adjustable head - Enables precise angle adjustment and more consistent clamping than single-bolt designs, especially when dialing in tilt
• 6066 aluminum alloy post with forged head - Prioritizes long-term durability for high-mileage road and gravel use, plus trail-capable strength for MTB applications
• 400mm length - Provides broad insertion range for modern frames and rider fit needs
• Common diameters - Available in 27.2mm, 30.9mm, and 31.6mm to match many road, gravel, and mountain bike frames
• ASTM 3 / ISO MTN tested - Verified to meet mountain-category testing standards for confidence across mixed-surface riding