Firstly, The Spyderco Urban Lightweight Rex 45 Sprint Run is a compact, non-locking folding knife that exemplifies Spyderco’s commitment to blending high-performance materials with user-focused design. Tailored for urban environments and places with restrictive knife laws, the Urban is part of Spyderco’s SLIPIT line—knives that operate with a slipjoint mechanism rather than a locking one.
🔩 Blade Steel: CPM-REX 45
Again, At the heart of this limited-editionSpyderco urban Rex is its CPM-REX 45 blade, a tool steel produced using Crucible’s particle metallurgy process. REX 45 is similar to HAP40 in composition, with a high level of tungsten, vanadium, and cobalt, which makes it:
- Extremely wear-resistant
- Capable of taking and holding a razor-sharp edge
- Tougher than most high-hardness steels, although somewhat prone to corrosion if not maintained
More so, This steel is not stainless and will develop a patina over time with use—a trait many knife enthusiasts appreciate for its character and history.
Furthermore, The blade itself is ground in Spyderco’s signature full-flat grind, which enhances slicing ability and reduces drag. The leaf-shaped profile offers a broad belly and a sharp tip, ideal for precision work. Finished with a black oxide (PVD) coating, the blade resists minor corrosion and adds a tactical aesthetic.
🖐️ Ergonomics & Handle
In addition, The handle is constructed from fiberglass-reinforced nylon (FRN)—lightweight, tough, and impervious to most chemicals. Spyderco’s bi-directional texturing on the scales ensures a solid grip in wet or dry conditions.
Despite its small size (overall length just under 6 inches), the ergonomic design includes:
- A finger choil and jimping that provide a secure forward grip
- An ambidextrous wire pocket clip that allows for deep carry and reversible positioning
- Lightweight build—just under 2 ounces, making it a near-invisible EDC option
📏 Specifications
- Overall Length: ~5.95” (151 mm)
- Blade Length: ~2.52” (64 mm)
- Closed Length: ~3.45” (88 mm)
- Blade Steel: CPM-REX 45
- Weight: ~1.98 oz (56 g)
- Grind: Full Flat
- Clip: Reversible wire clip
- Mechanism: Slipjoint (non-locking)
🔥 Sprint Run Details
- Collectors of Spyderco’s sprint runs and rare variants
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Tommie –
Write more, thats all I have to say. Literally, it seems as though you
Outstanding knife. Comfortable grip, perfect blade shape, and unbeatable corrosion resistance.
Antoinette –
The action is fast and the safety is very solid. Feels premium all around.
Gudrun –
“Razor sharp out of the box. Great auto for everyday carry or duty use.
Jermaine –
Super impressed with the overall performance.
The product looks great, works flawlessly, and feels well-made.
I’m extremely satisfied with my purchase.”
Georgina –
I’m amazed at how much control this knife gives you. The finger choil is a game changer and makes the urban Rex feel like a much bigger tool. The fit and finish are top-tier. Absolutely love carrying this every day.”