Interlock™ Seatpost
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Interlock™ Seatpost
The lock that hides inside your bike

Made by Interlock
Free Lock Promo: Use Code "FREELOCK" to score a Kryptonite Keeper 512 when you order any bike today!+ Free Shipping on all US Orders over $50!
Customize your build

The InterLock™ hides inside of your bike frame through the seat post. It's universal and can be installed on virtually any bike. 

Specs: Cables are 90cm total length, or 36 inches if you’re imperially inclined. Will fit all State Bicycles (except city bikes) as well as many other bicycles. Choose size 27.2 mm for all our standard bikes, or 31.6 mm for 6061 Black Label models. Please check the required measurements of any non-State Bicycle with the owner's manual or a professional bicycle mechanic to ensure proper fit.

  • Product weight: 620 Grams including lock and seatpost
  • Seatpost is 3D Forged, 6061 Aluminium
  • 27.2 mm diameter

SHIPPING:  Most in-stock items ship within 1 business day! Tracking information is provided upon shipment. Learn more about our Shipping Policy

ASSEMBLY:  Ships 90% assembled. We strongly encourage having your bike professionally assembled.

WARRANTY:  Warranty activated when you submit proof of professional assembly. 

  • 5-year Warranty on all bicycle frames
  • 1-year Warranty non-consumable parts
  • 2-year Warranty on Essor USA products

Learn more about our Warranty Policy.


RETURNS: If you wish to return your purchased item, you may do so within 7 days of delivery. Learn more about our Return Policy.

We pride ourselves on having a friendly and knowledgeable staff. Contact us and we'd be happy to help you out in any way we can.