Kryptonite Keeper 5s Disc Lock, black chrome vs SIGTUNA Folding Bike Lock - Hardened Steel 8mm Fold-Up

Overall winner: SIGTUNA Folding Bike Lock - Hardened Steel 8mm Fold-Up

Key Differences

Kryptonite Keeper 5s (A) is a compact, weatherproof disc lock with a higher average rating (4.60 from 3,801 reviews) and a more affordable listed price tier. SIGTUNA Folding Lock (B) uses hardened high-tenacity steel with a double deadbolt and an installable mount, offering greater physical robustness but with lower average rating (4.30 from 1,484 reviews) and some reports of locks becoming unusable

Kryptonite Keeper 5s Disc Lock, black chrome

Kryptonite Keeper 5s Disc Lock, black chrome

Kryptonite • ★ 4.3/5 • Budget

Compact, weatherproof disc lock with 5mm pin diameter for smaller vent holes. Includes reminder cable to prevent riding away while engaged, and immobilizes vehicle to deter theft. Customers note easy use and solid security

Pros

  • compact and lightweight
  • weatherproof design
  • easy to use
  • includes reminder cable

Cons

  • key can get stuck sometimes
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SIGTUNA Folding Bike Lock - Hardened Steel 8mm Fold-Up

SIGTUNA Folding Bike Lock - Hardened Steel 8mm Fold-Up

SIGTUNA • ★ 3.7/5 • Mid-Range

Compact foldable bike lock with high-strength steel and secure double deadbolt mechanism. Customers note sturdy build and ease of use, though some report occasional usability issues

Pros

  • high-tenacity steel construction
  • high-security double deadbolt
  • easy-to-install mount
  • compact design for portability

Cons

  • some users report lock becoming unusable
  • mixed feedback on weight
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Head-to-Head

CriteriaWinner
Price Kryptonite
Durability SIGTUNA
Versatility SIGTUNA
User Reviews Kryptonite