OTTOLOCK Sidekick Compact U-Lock and Cable Bundle - Lightweight

Our review of the OTTOLOCK Sidekick finds it best suited to commuters and casual riders who need a practical, portable deterrent rather than a fortress-class lock. The Sidekick's single biggest selling point is its combination of a compact, lightweight U-lock and an optional 5ft cable that together make it easy to carry and versatile enough to secure a wheel or a bike to a post without adding bulk. For anyone prioritizing convenience, frame protection and reliable day-to-day theft deterrence, this bundle hits the mark.

Key Features

• Compact design: The small U-lock profile and light 750 gram weight make it simple to carry in a backpack or pocket for everyday use.
• Silicone-coated body: A soft silicone cover protects paint and prevents the lock from scratching a bike frame while still providing a durable exterior.
• Hardened steel construction: Double-shackle 12mm hardened steel and an anti-rotation deadbolt offer dependable resistance to casual attacks.
• Includes keys: Each lock ships with three keys so riders can keep spares for home, work, or a daily carry option.
• Versatile cable option: The included 5ft x 8mm stainless-steel cable expands the lock's use to cover wheels, accessories, or larger locking points.

Who It's For

The Sidekick bundle is aimed at urban cyclists, students and anyone who rides light e-bikes or commuter bikes and values portability. It is especially useful for riders who want a lock that is easy to stow when on the move but still provides a visible deterrent when parked for short to moderate stops.

Riders who need maximum security for long unattended parking sessions or who frequently lock up in high-risk areas should consider a heavier-duty chain or larger U-lock instead, as the Sidekick prioritizes weight and convenience over heavyweight resistance to targeted attacks.

Pros & Cons

Pros

• Lightweight at about 750 grams, making it easy to carry and hang on the bike.
• Silicone coating prevents frame scratches while remaining resilient to daily use.
• Comes with three keys and an optional 5ft stainless-steel cable for added versatility.
• Compact opening size is effective for locking a single tube to posts and poles.

Cons

• The compact opening measures 2.75 in x 5.75 in and can feel small for some locking situations, limiting how and where it fits.
• Designed as a light to medium deterrent rather than a heavy-duty, long-term security solution.

Specifications

Weight	750 grams (1.65 lbs)
Opening size	2.75 in x 5.75 in (7 cm x 14.5 cm)
Shackle	Double-shackle 12 mm hardened steel
Coating	Silicone-coated body to protect frame
Cable	5 ft x 8 mm stainless-steel cable included
Keys	Three keys included

Our Verdict

The OTTOLOCK Sidekick bundle is a practical, well-balanced choice for everyday riders who want a lightweight, non-damaging lock that is easy to carry and deploy. It offers good value for commuters and casual cyclists thanks to its silicone protection, hardened steel shackle and the useful cable, but those requiring maximum security for long-term parking should opt for a heavier unit.

Frequently Asked Questions

Can the Sidekick scratch my bike frame?
The silicone-coated body is designed to protect the frame and prevent scratching during normal use.

How many keys are included?
The lock ships with three keys so you can keep spares for home or work.

Is the cable suitable for securing both wheels?
The 5 ft x 8 mm cable adds versatility for wheels and accessories, but it is best used with the U-lock for adequate deterrence.