Seatylock Mason Bike U Lock
Patented Heavy Duty Anti Theft Diamond Secure ULock - Ultra Security Bicycle Safety Tool with Keys for City…
Price as of 2026-06-02. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$7–$19
- Mid-range:$19–$48
- Premium:$48+← You are here
Is This Right For You?
- •Buyers who prioritize quality over price in Bike Locks
- •Those who want a top-rated option — in the top 6% of Bike Locks by rating
- •You're on a tight budget — $40 above the category average of $40
- •NDakter Bike Locks Heavy Duty Anti Theft 18mm Thick — 59% cheaper at $33 (Score B)
📊 Based on data analysis of 54 products in this category.
Mubboo Score: B-
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other Bike Locks
Computed from live Amazon rating, review count, and price across 54 Bike Locks available to US consumers · last refreshed 2026-06-02.
How It Compares
This Product Seatylock Mason Bike U Lock | Most Popular Kryptonite Evolution Mini-7 Bike U-Lock | Best Rated Seatylock Viking Bike Chain Lock | Best Value NDakter Bike Locks Heavy Duty Anti Theft 18mm Thick | |
|---|---|---|---|---|
| Price | $79.98 | $102.59 | $64.98 | $32.99 |
| Rating | 4.7/5 | 4.5/5 | 4.7/5 | 4.7/5 |
| Reviews | 728 | 13,975 | 1,331 | 556 |
| Mubboo Score | B- | B | B | B |
Quick Specs
- Color
- Black Diamond
- Shape
- Oval
- Material
- Hardened Steel with Nylon 6 & Glass Fibers Cover
- Lock Type
- Patented Triangular Crossbars with Double Deadbolt
- Unit Count
- 1.0 Count
- Item Weight
- 1.07 Kilograms
- Finish Types
- Hardened Steel Encased in a Military Grade Polymer
- Manufacturer
- Seatylock
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Check lock dimensions and length to ensure it fits your bike and the object you plan to lock to; for higher risk areas, consider a heavier-duty lock with higher security ratings.
- Ease of Use / Simple Operation
- Sturdy Build / Solid Security
- Suitable for Low-Risk / Quick Stops
- Convenient Combo/Key Features
- Size Limitations / Too Small for Some Bikes
- Mounting/Operation Issues (Plastic Mount, Fiddly Locking)
- Fabric Cover Deterioration
Expert Picks in Bike Locks
- Kryptonite Evolution Mini-7 — Most riders / everyday use
- Kryptonite New York Fahgettaboudit Mini — High-theft areas / urban commuters
- Hiplok D1000 — Maximum security / expensive bikes
- Hiplok D1000 — Overall top security pick
- Kryptonite New York Lock Standard — Urban commuters
- Abus Granit Super Extreme 2500 — E-bike owners
- Hiplok DX1000 — E-bikes / motorcycles needing large locking area
Category recommendations from independent expert publications. Source links in References.
Related Video Reviews
- 📹 We Tested The 5 BEST Bike Locks Currently Available in 2025 — Cycling Weekly
- 📹 Best Bike Locks Tested: Which Survives A Grinder Attack? — Cycling UK
- 📹 Testing The World's Best Bike Locks — Francis Cade
Key Features
- ✦LIGHTEST DIAMOND SOLD SECURE U LOCK- Best Lightweight Portable & Solid Professional Lock. Security Level 19/20. No Code or Chain for Outdoor & Urban Cycling. Bolt Cutter Drill Pick…
- ✦3 YEAR PEACE OF MIND PATENT ULTRA STRENGTH HEAVY DUTY ANTI THEFT TECHNOLOGY - Anti Cut Durable Waterproof Weatherproof Bicycle Protector with Antitheft Triangle Shaped Crossbars. S…
- ✦RELIABLE HIGH PERFORMANCE PROTECTION - SeatyLock Pro Break Resistant Thief Deterrent. Compact & Easy Carry Bike Accessory. Rust Prevention Coating & Components for Dependable & Qua…
- ✦UNIQUE AUTOMATIC KEYHOLE SHUTTER - Super Specialized Dust Dirt Rain & Weather Proof Locking Gear for e-Bikes Roadbikes Electric Bikes Scooters & Motorcycles. Mounting bracket to Ho…
- ✦U-LOCK WITH DOUBLE THICKNESS PROTECTIVE PLATES - Smart Cutting Edge Design for Extreme Safety. Ultimate Combination of Light Weight & Maximum Security for Safe Cycles. Tough Anti-T…
Source: product listing on Amazon.
About Seatylock
- 5 products in our database
- Average rating: 4.7/5 across all products
- Price range: $64.98 – $109.98
- Categories: Bike Locks
If not the Mason Bike U Lock, consider these
Bottom Line
Seatylock Mason Bike U Lock earns Mubboo Score B-. Priced at $80 — a premium option, above the category average of $40. Rated 4.7/5 from 728+ reviews. Strong buy if: buyers who prioritize quality over price in bike locks, those who want a top-rated option. Skip if: you're on a tight budget — Kryptonite Evolution Mini-7 Bike U-Lock (Score B, $103) may fit better.
Frequently Asked Questions
Is the Seatylock Mason Bike U Lock worth buying in 2026?
It earns a Mubboo Score of B-, with a 4.7/5 rating from 728 reviews — better than 94% of Bike Locks we track.
How much does the Seatylock Mason Bike U Lock cost?
It is currently $79.98 — premium-tier pricing for Bike Locks.
How does the Mason Bike U Lock compare to other Bike Locks?
The category's most-reviewed alternative is the Kryptonite Evolution Mini-7 Bike U-Lock (4.5/5, 13,975 reviews, $102.59). The Mason Bike U Lock carries a Mubboo Score of B- vs B.
Sources & References
- View on Amazon →
- wirecutter review →
- tomsguide review →
- techradar review →
- Browse all Bike Locks on Mubboo →
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-02) and may change.