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Compare two products
Pick any two products from our reviews and see specifications, price, buyer ratings and our scores in one table.
Recorded evidence
What separates these listings
- Price snapshot
- $35.15 price gap
- Product B has the lower captured price. This excludes delivery and ongoing costs.
- Editorial assessment
- 0.2-point score gap
- Product B has the higher research score, not a measured performance advantage.
- Specification coverage
- 13 of 15 fields shared
- Shared labels have recorded values on both sides; matching labels do not guarantee matching units or test conditions.
Product A
Kryptonite Keeper 785 Bike Chain Lock, 2.8 ft Heavy Duty Anti-Theft Lock
- Potential fit
- Securing mid-value bikes in moderate-risk areas
- Trade-off to resolve
- Short reach limits locking to wider posts
Product B
Master Lock 5' Resettable Combination Bike Lock, Metal Cable Lock, 8370D
- Potential fit
- Short campus stops with entry-level commuter bikes
- Trade-off to resolve
- Not sufficient for overnight or high-theft urban parking
Side-by-side evidence
15 of 15 recorded specification fields shown
| Side by side |  |  |
|---|---|---|
| Buyer rating | 4.6 | 4.6 |
| Price | $51.94 | $16.79 |
| Our score | 7.0/10 | 7.2/10 |
| Ratings count | 11,599 ratings | 7,320 ratings |
| Brand | Kryptonite | Master Lock |
| Best for | Securing mid-value bikes in moderate-risk areas | Short campus stops with entry-level commuter bikes |
| Build quality | 7.6/10 | — |
| Security level | 5.2/10 | — |
| Portability | 6.8/10 | 8.2/10 |
| Lock cylinder design | 7.4/10 | — |
| Frame protection | 8.0/10 | — |
| Physical security | — | 3.8/10 |
| Ease of use | — | 8.6/10 |
| Finish protection | — | 8.0/10 |
| Value | — | 7.4/10 |
| Included Components | Bicycle Lock | Resettable Bike Lock Cable |
| Recommended Uses For Product | Security | outdoor |
| Number of Pieces | 1 | 1 |
| Model Number | 720018000853 | 8370D |
| Model Name | Kryptonite Keeper 785 Integrated Chain | 8370D |
| Number of Packs | 1 | 1 |
| Item Type Name | Kryptonite Keeper 785 Integrated Bicycle Lock Chain Bike Lock, 33.5-Inch, Black | Bike Lock Cable |
| Additional Features | Portable | Durable. |
| Brand Name | Kryptonite | Master Lock |
| Manufacturer Warranty Description | No information | Not recorded |
| Number of Items | 1 | 1 |
| Manufacturer | Kryptonite | Master Lock |
| Unit Count | 1 Count | 1 Count |
| Manufacturer Part Number | 000853 | 5569944 |
| Lock Type | Not recorded | Combination Lock |
| Our verdict | The 7mm manganese steel links provide a tangible upgrade in physical security over hardware-store chains. The 2.8-foot length is somewhat restrictive, requiring careful positioning against bike racks and street anchors. It strikes a pragmatic balance between portability and daytime deterrence for mid-value bicycles. | This five-foot cable features a user-resettable combination dial and moderate reach for casual campus or utility lockups. While more convenient than fixed-code cables, its security ceiling remains strictly low-to-medium. Prospective buyers with high-value bikes or e-bikes should budget for a rated U-lock instead. |
| Pros and cons |
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Prices and buyer ratings are captured snapshots. A dash means the detail was not recorded, not that a feature is absent. Editorial scores are research assessments, not laboratory measurements.
Sources and limits
This page summarizes our research reviews of Amazon listings, listed specifications and captured buyer ratings. It is not a hands-on test. Scores are editorial assessments, not measured performance; prices are recorded snapshots and may change. A category can include both main products and accessories, so its overall price range is not the cost of a complete setup.
Most recent product record update: September 22, 2026. Individual records may be older; this is not a verification date for every claim. Prices on this page were read from the listings Nov 10, 2026 – Nov 12, 2026.
- Amazon listing: Kryptonite Keeper 785 Bike Chain Lock, 2.8 ft Heavy
- Amazon listing: Master Lock 5' Resettable Combination Bike Lock, Metal
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