Wheel Mate Muteki SR48 Open End Lug Nuts – Black | 12x1.25 | 48mm

Secure your aftermarket wheels with one of the most trusted lug nut sets in the JDM and import enthusiast community — the Wheel Mate Muteki SR48 Open End Lug Nuts. The SR48’s open-end design accommodates extended wheel studs and spacer applications where a closed-end nut would bottom out before achieving proper clamping force. In 12x1.25 thread pitch and 48mm length, these lug nuts are a go-to choice for a wide range of Japanese performance platforms. The black finish adds a clean, aggressive look that complements both polished and dark wheel finishes.

Key Features:

• Open-end design — accommodates extended wheel studs and wheel spacer applications where closed-end lug nuts would bottom out
• 12x1.25 thread pitch — correct thread for a wide range of Japanese performance vehicles including Subaru, Mitsubishi, Nissan, and others
• 48mm length — extended length for proper thread engagement on extended studs and spacer setups
• Black finish — durable coating for a clean, aggressive appearance behind the wheel
• Muteki SR48 design — one of the most popular and trusted lug nut sets in the JDM enthusiast community
• Set of 20 — sufficient for a complete 4 or 5-lug vehicle (20 lug nuts covers 4x5-lug or 5x4-lug configurations)
• Forged steel construction — high-strength material for reliable clamping force and long-term durability

Performance Benefits:

• Open-End Clearance: The open-end design allows the lug nut to thread fully onto extended studs without bottoming out — critical for wheel spacer applications and extended stud kits where a closed-end nut would not achieve proper clamping depth
• Proper Thread Engagement: 48mm length ensures adequate thread engagement on extended studs for safe, reliable wheel retention
• Correct Thread Pitch: 12x1.25 thread pitch matches the factory stud specification for common Japanese performance platforms — no adapters or modifications required
• Reliable Clamping Force: Forged steel construction maintains consistent clamping force under the thermal and mechanical stresses of performance driving
• Visual Upgrade: Black finish elevates the wheel well appearance with a clean, purposeful look that complements aftermarket wheels

Specifications:

• Brand: Wheel Mate (Muteki)
• Part Number: 32905B
• Model: SR48
• Thread Pitch: 12x1.25mm
• Length: 48mm
• End Type: Open end
• Finish: Black
• Material: Forged steel
• Quantity: 20 lug nuts per set
• Socket Size: Verify with product documentation — typically 19mm hex

Fitment Information:

• Universal fitment for vehicles with 12x1.25mm threaded wheel studs
• Common 12x1.25 applications include: Subaru (WRX/STI/BRZ/Forester), Mitsubishi (Evo/Eclipse/Galant), Nissan (240SX/350Z/370Z/GT-R/Skyline), Infiniti (G35/G37), and many others
• Note: Verify your vehicle’s stud thread pitch before ordering. Common thread pitches include 12x1.25, 12x1.5, 14x1.5, and 14x2.0 — these lug nuts are for 12x1.25 only
• Open-End Requirement: Recommended for use with extended wheel studs or wheel spacers where stud length exceeds the capacity of a closed-end lug nut
• Seat Type: Verify your wheel’s lug seat type (conical/tapered, ball/radius, or flat) matches the SR48’s seat before ordering

What’s Included:

• Wheel Mate Muteki SR48 open end lug nuts – black, 12x1.25, 48mm (32905B)
• 20 lug nuts per set
• Socket/key (verify with product documentation)

Installation Notes:

• Verify thread pitch (12x1.25) and seat type compatibility with your wheels before installation
• Hand-thread all lug nuts before applying torque to avoid cross-threading
• Torque to your vehicle manufacturer’s specification — typically 80–100 ft-lbs for most Japanese performance applications
• Re-torque after first 50–100 km of driving
• Do not use an impact wrench without a torque stick — overtightening can damage wheel seats and studs
• Inspect lug nuts for thread wear or damage at every wheel removal

Open-End vs. Closed-End Lug Nuts:

Standard closed-end lug nuts have a cap at the top that limits how far the stud can protrude through the nut. This works fine for factory-length studs, but creates a problem when extended studs or wheel spacers are used — the stud bottoms out inside the nut before the nut achieves proper clamping force against the wheel. Open-end lug nuts like the Muteki SR48 have no cap, allowing the stud to pass completely through the nut regardless of length. This makes them the correct choice for any application using extended studs or wheel spacers, ensuring full thread engagement and proper clamping force every time.

Why Muteki?

Muteki (meaning “invincible” in Japanese) is one of the most recognized lug nut brands in the JDM and import enthusiast community. Their SR48 open-end lug nut has been a staple of the aftermarket wheel and spacer scene for years — trusted for its thread quality, consistent finish, and reliable performance across a wide range of applications. Wheel Mate’s Muteki lineup is a go-to choice for enthusiasts who want a quality lug nut upgrade that looks as good as it performs.

Perfect For:

• Subaru WRX/STI/BRZ, Mitsubishi Evo, Nissan 240SX/350Z/370Z/GT-R, and other 12x1.25 applications
• Builds using extended wheel studs where closed-end lug nuts would bottom out
• Wheel spacer setups requiring open-end lug nuts for proper thread engagement
• Aftermarket wheel installations seeking a clean black lug nut finish to complement the wheel aesthetic
• Anyone upgrading from factory lug nuts to a quality aftermarket set with a more aggressive appearance

Pro Tip: Always verify your wheel’s lug seat type before purchasing lug nuts. Conical (tapered) seat wheels require conical seat lug nuts — using the wrong seat type will not clamp the wheel correctly and can cause wheel loosening or damage. Check your wheel manufacturer’s specifications before ordering.

Note: Open-end lug nuts expose the stud end when installed. Ensure your stud length is appropriate for your application — excessive stud protrusion beyond the lug nut can contact brake components or other hardware.