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Master Lock

Master Lock Bike Cable Lock 4'x 5/16" 4-Digit Combination,

Based on 41,373 reviews
Condition: New
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$8.99
Holiday Deal · 53% off was $18.98

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Nov 14
Order within 7 hours and 33 minutes

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At a glance

Condition
New
Color
Assorted
Number of Items
1
Model
8143D
Dimensions
48 x 0.31 x 0.31 in
Weight
4.8 oz
Material
braided steel, vinyl coating
In the box
One combination bike lock

Features 5

  • VERSATILE BIKE LOCK: Master Lock 8143D cable bike lock helps secure bicycles, e-bikes, scooters, strollers, grills, kayaks, outdoor gear and more; Ideal for everyday bike security and basic theft deterrence
  • PRESET COMBINATION LOCK: Bicycle lock features a preset four-digit combination for keyless convenience; Combination bike lock provides quick, easy security without carrying keys
  • BRAIDED STEEL CABLE: Bike cable lock is made with braided steel for strength and flexibility; Protective vinyl coating helps prevent scratches on bikes, scooters and gear
  • COMPACT SECURITY CABLE: Bike lock cable measures 4 ft. (1.2 m) long with a 5/16 in. (8 mm) diameter, offering flexible reach for locking bicycles, scooters and outdoor equipment to fixed objects

Description

Keep your bicycle secure with the Master Lock 8143D combination bike lock cable, a simple keyless solution for everyday bike security. This 4 ft. (1.2 m) cable bike lock features a 5/16 in. (8 mm) braided steel cable that offers strength and flexibility for securing bikes to racks, fence posts and other fixed objects. The protective vinyl coating helps prevent scratches on your bike frame and finish, while the preset four-digit combination lock eliminates the need to carry keys. Ideal for bicycles, e-bikes, scooters, strollers, kayaks, grills and outdoor gear, this versatile bicycle lock cable provides basic theft deterrence for commuting, recreation and everyday use. Backed by a Master Lock Lifetime Guarantee, this durable anti-theft bike lock is a practical security cable for cyclists and outdoor equipment.

Specs 30

Brand Master Lock
Special Feature Weather Resistant
Lock Type Combination Lock
Item dimensions L x W x H 48 x 0.31 x 0.31 inches
Material braided steel, vinyl coating
Brand Name Master Lock
Recommended Uses For Product Bike Lock, Cycling, Scooter lock, bicycles, ATVs, grills, and lawn mowers, eBike Lock
Number of Pieces 1

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 14

Yes, absolutely! This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2027.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Simple, Reliable Cable Lock for Quick Everyday Security
Size: 4' x 5/16" Number of Items: 1
Simple, Reliable Cable Lock for Quick Everyday Security This is a nice, straightforward cable lock that does exactly what I needed it to do. It is lightweight, flexible, and easy to loop through a bike frame, scooter, gate, or other outdoor item without being bulky or awkward. The vinyl coating is a good touch because it helps keep it from scratching the surface of whatever you are locking up. The preset combination is convenient if you do not want to deal with keys, and the dials are easy enough to use. Just keep in mind that this version has a preset code, so you cannot choose your own combination. That is not a problem for me, but it is worth knowing before ordering. This is best for basic everyday security, quick stops, kids’ bikes, scooters, or as a simple theft deterrent. I would not consider it a heavy-duty lock for leaving an expensive bike unattended for long periods in a high-risk area, but for the price and intended use, it works very well. Bottom line: A simple, affordable, easy-to-use cable lock that is great for basic everyday security and quick lockups. ... show more
Reviewed in the United States on May 19, 2026 by Everyday Reviews
Good lock
Size: 4' x 5/16" Number of Items: 1
Reliable lock , bought this for my son , it comes with the code on a keychain
Reviewed in the United States on October 1, 2026 by yaislin
Not bad, not awesome.
Size: 4' x 5/16" Number of Items: 2
I suppose these are pretty good for the money. They are master so that's a decent brand. They are a little thin and a little short, but they will at least keep somebody from walking off with your bike if you have to run into a store or something quickly.
Reviewed in the United States on August 21, 2026 by I'm just a guy
Good small bike lock
Size: 4' x 5/16" Number of Items: 1
Perfect bike lock just for a rack at the apartment when you don’t need to be too extra but you don’t want other random people riding your bike. Instructions were easy, it’s a smaller fit but it works. Sturdiness is good. And it’s a great price when you just need something to make sure people aren’t taking your bike. ... show more
Reviewed in the United States on August 22, 2026 by Brookelyn
Opens every time
Size: 4' x 5/16" Number of Items: 1
I have had this lock attached to the bed of my truck for five years. Rain, snow or sleet it opens every time and allows me the convenience of leaving a tool or two over night in the bed.
Reviewed in the United States on August 21, 2026 by MadPage
Comes preset. Can’t set your own combination.
Size: 4' x 5/16" Number of Items: 1
Did not realize it came preset. Locked it and lost the tiny little red combination tag. Now we have to cut it off. Would not buy another one
Reviewed in the United States on September 13, 2026 by Marcy Anderson-Brown
Nice cable lock
Size: 4' x 5/16" Number of Items: 1
This is great! I use it as a second lock for my bike. Takes a little bit to uncoil but I've been using it for a couple weeks now and it stretches much easier.
Reviewed in the United States on August 25, 2026 by Anya
Works good
Size: 4' x 5/16" Number of Items: 1
Nice lock, works as it should.
Reviewed in the United States on September 15, 2026 by Amazon Customer
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