OTTOLOCK Cinch Lock 18 in - Lightweight Pocketable Bike Lock

In this review of the OTTOLOCK Cinch Lock 18 in, the bottom line is simple: this is a purposeful, ultra-light theft deterrent for quick stops and mid-ride errands. Riders who value minimal weight and compact carry will appreciate that the 18 Original weighs just 145 grams and coils to about 3 in diameter, so it can live in a pocket or saddle bag without adding bulk. The Cinch is not a replacement for heavy duty security but it excels as a convenient secondary lock for short stops and on-the-go security.

Key Features

• Ultra Lightweight: At roughly 145 grams the Cinch is significantly lighter than a U-lock and stays out of the way during long rides or commutes.
• Compact Carry: The band coils to about a 3 in diameter so it fits easily in a pocket, saddle bag, or clipped to your frame for mid-ride convenience.
• Patented, Made in USA Design: Hand-built in the United States with three layers of stainless steel and an aramid fiber jacket to resist basic cutting and sawing tools.
• Frame Protection: The Santoprene plastic coating helps prevent scratches to paint while still allowing the lock to cinch tightly around objects.
• Resettable Combination: The built-in 3-dial combination is resettable, removing the need to carry a key and simplifying shared use among riders.
• Versatile Use: The Cinch works well on bicycles, e-scooters, e-bikes, and for gear like paddleboards or helmets when you need temporary security.

Who It's For

The Cinch Lock is ideal for cyclists and scooter riders who make frequent short stops and want a negligible weight penalty; bikepackers and touring riders who need something pocketable will find its low mass and compact size especially useful. It is also a good fit for commuters who combine public transit with short rides and need a quick way to deter opportunistic theft.

This is not intended as a primary theft solution for long duration parking or high-risk urban areas; riders who need maximum resistance to dedicated theft tools should look for a heavy U-lock or a redundant locking strategy as recommended by the maker.

Pros & Cons

Pros

• Exceptionally light and pocketable, making it easy to carry on years of varied rides.
• Well-built with layered stainless steel and aramid fiber jacket for basic cut resistance.
• Coated band protects bike finish while providing a snug cinch when locking to objects.
• Resettable 3-dial combination removes the need for keys and simplifies sharing.

Cons

• Not a replacement for a U-lock; it is intended to deter opportunistic thieves but can be defeated with time and proper tools.
• Some customers report occasional functionality issues with the unlock mechanism, so inspect and test before relying on it in critical situations.

Specifications

Brand	OTTOLOCK
Model	Cinch Lock 18 Original
Length	18 in
Weight	145 grams (0.3 lbs)
Construction	Three layers stainless steel with aramid fiber jacket
Coating	Santoprene anti-scratch plastic
Lock Type	Resettable 3-dial combination

Our Verdict

The OTTOLOCK Cinch Lock 18 in is a smart, lightweight companion lock for riders who prioritize portability and quick-stop security. It offers solid construction and convenient carryability at a modest price; buy it if you need a secondary deterrent for short stops, but combine it with a heavy U-lock for long parking or high-theft areas for best protection.

Frequently Asked Questions

Is the Cinch Lock a full replacement for a U-lock?
The Cinch is designed as a convenient deterrent for short stops and is not a full replacement for a U-lock; use it as a secondary or quick-stop solution.

How does it carry on a ride?
The Cinch coils to about 3 in diameter and is light enough to carry in a pocket, saddle bag, backpack, or attached to a bike frame without noticeable weight.

Can the combination be changed?
Yes, the lock uses a resettable 3-dial combination so you can set and change the code without keys.