Vintage Sugino Crank Arm Caps– 2 Hole Threaded Dust Covers Square

Crank Arm Caps Black Plastic Dust Covers for Square Taper Bicycle Crankset (Pair).

This is a Sugino-branded slotted crank arm dust cap pair, a premium and collectible style often found on vintage Japanese bicycles from the 1970s–1990s, including road, track, and touring models. These feature a black gloss finish with silver “SUGINO” logos and diamond graphics, giving them an authentic, high-end appearance. The single-slot center allows for removal with a flat screwdriver or coin. These Sugino Black Slotted Crank Arm Caps are authentic, high-quality threaded dust covers designed for square taper bicycle cranksets. With a classic slotted center and white Sugino logo detailing, they provide a perfect restoration finish for vintage and retro bicycles.

• Product Name: Crank Caps Black

• Function: Threaded dust caps for crank arms

• Material: Durable plastic (lightweight and corrosion-resistant)

• Color: Black (matte finish for a clean, OEM-style look)

• Thread Type: Standard crank arm thread (fits most square-taper or cotterless cranksets)

• Diameter (approx.): 22–23 mm outer diameter (varies slightly depending on model)

• Depth (approx.): 5–6 mm

• Compatibility:

  • Suitable for most 3-piece square-taper cranksets

  • Works with vintage, cruiser, BMX, road, and mountain bikes that use standard crank threads

• Weight: Lightweight – approximately 2–3 grams per cap

• Quantity: 1 Pair (2 pieces – left and right side)

• ✅ Protective Design: Keeps crank threads free from dust, dirt, and rust.

• ✅ Lightweight & Durable: High-quality plastic construction offers reliable performance without adding weight.

• ✅ Universal Fit: Works with most standard bicycle crank arms.

• ✅ OEM Replacement: Ideal for replacing missing or worn-out crank arm caps.

These crank caps are used on many Schwinn, Huffy, Mongoose, Kent, and Lowrider-style bicycles, as well as custom builds and vintage restorations. They offer both protection and a clean, finished look to your crank area.

• Make sure threads on crank arms are clean before installation.

• Lightly hand-thread the caps to avoid cross-threading.

• Not compatible with non-threaded crank arms or self-extracting crank bolts.

These Black Plastic Crank Caps are an affordable yet essential accessory to protect your bike’s crank arms. They maintain the polished appearance of your build while preventing unnecessary wear caused by dirt and exposure. Perfect for both classic restorations and modern bikes alike.