WhyToBuyThis
Kryptonite Keeper 5-S2 Disc Lock (Yellow)
For Him / Her / Kids

Kryptonite Keeper Disc Locka lock small enough to carry on every ride

Kryptonite Keeper 5-S2 Disc Lock (Yellow)

Reviewed by the WhyToBuyThis team · Updated September 2026 · How we choose

Perfect for

  • Street parking
  • Commuters
  • Pocket size
  • Under $50
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Price: $43.92

Price may change on Amazon. As an Amazon Associate we earn from qualifying purchases. This won't cost you anything extra.

  • Great gift ideaChosen for real-world gifting
  • Hand-pickedCurated, not scraped
  • Honest reviewThe catch, not just the hype

Why this gift works

The Kryptonite Keeper 5-S2 Disc Lock clamps through a vent hole in a motorcycle's brake rotor so the wheel cannot turn. It has a 5.5 mm pin, fits rotors up to 6 mm thick with up to 41.5 mm insertion depth, weighs 1.24 pounds and uses a dual-reinforced disc-style cylinder in a waterproof body. It comes with two keys and an orange reminder cable that runs to the handlebar, and Kryptonite gives it a lifetime warranty. This listing is yellow.

Big chains stay at home; a disc lock fits in a jacket pocket and gets used every time the bike is parked on the street or at work. The reminder cable solves the classic disc-lock mistake of riding off with it still on.

Who is this gift for?

Great for

  • A commuter who parks at work
  • A rider who parks on the street
  • Pairing with a cover at home

Think twice if

  • Their rotor holes are too small
  • They want an alarm

The catch

The 5.5 mm pin fits only rotors with holes at least that wide and rotors up to 6 mm thick; it has no alarm; and it stops the wheel turning but does not lock the bike to anything.

Skip if their rotor holes are smaller than 5.5 mm or the rotor is thicker than 6 mm - check before buying.

Key specs

Kryptonite Keeper 5-S2 Disc Lock (Yellow) specifications
BrandKryptonite
ModelKeeper 5-S2, yellow (000884)
Pin5.5 mm
Max rotor thickness6.0 mm
Max insertion depth41.5 mm
Weight1.24 lb
Included2 keys, reminder cable
WarrantyLifetime

Worth knowing before you buy

  • A black chrome version is a separate listing.
  • It weighs 1.24 pounds.

Why we like it

  • Fits in a pocket
  • Reminder cable prevents mistakes
  • Waterproof body
  • Lifetime warranty

What to look for in a motorcycle disc lock

  • Pin size. Check the pin fits their rotor holes - 5.5 mm here.
  • Reminder. A reminder cable prevents riding off with the lock on.
  • Carry size. A lock that fits a pocket gets used every time.

Questions people ask

It needs rotor vent holes of at least 5.5 mm, a rotor up to 6 mm thick and no more than 41.5 mm insertion depth.

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