MRT Center Cap for Tail Gunner Gen 2 & Machine Gunner Wheels

Great wheels deserve a finished center. A missing center cap leaves the hub exposed and makes a sharp setup look incomplete. The MRT Center Cap for Tail Gunner Gen 2 & Machine Gunner Wheels (part TG4156-CAP) comes from MRT, a maker of UTV wheels and wheel accessories.

Shop more in our UTV and ATV wheels collection.

Why Choose the MRT Center Cap for Tail Gunner Gen 2 & Machine Gunner Wheels

Key Features

• Covers the center hub area for a clean, finished look
• Sold individually; order one per wheel
• Variants for Tail Gunner 4x156, 4x137 and 5x114.3, and Machine Gunner 5x114.3
• Center cap only; wheel not included

Great For

• MRT wheel owners finishing a build
• Replacing lost or damaged parts
• A clean, matched look

Specifications

• Brand: MRT
• Part number(s): TG4156-CAP, TG4137-CAP, TG5114-CAP, MG5114-CAP
• Fits: Tail Gunner Gen 2 wheels with predrilled cap mounting holes; Machine Gunner 5x114.3 wheels
• Sold as: Each

Fitment

Tail Gunner Gen 2 wheels with predrilled cap mounting holes, and Machine Gunner wheels in 5x114.3, per MRT. Inspect your wheels for the predrilled holes before you order. Not sure? Contact us with your year, make and model, and we’ll confirm.

How to Choose UTV Wheels

• Bolt pattern: Match it exactly (for example 4x156, 4x137 or 5x114.3).
• Offset and backspacing: More backspacing tucks the wheel in; less pushes it out for a wider stance.
• Load rating: Pick a rating above your machine’s weight per corner, plus passengers and cargo.
• Beadlock vs. standard: Beadlocks hold the bead at very low pressure; they need regular ring-bolt checks.
• Accessories: Add center caps and matching lug nuts to finish the build.

Installation Tips

1. Confirm your wheel has the predrilled cap holes.
2. Line up the cap with the mounting holes.
3. Install and tighten the hardware evenly; don’t overtighten.

Care and Maintenance

• Wash wheels with mild soap; avoid harsh acids on machined finishes.
• Check lug nuts and caps for tightness regularly.
• Inspect for bends or cracks after hard hits.
• Run the tire pressure recommended for your terrain.

Related MRT Products

• MRT Tail Gunner 15x7 UTV Beadlock Wheel, Black/Machined
• MRT Machine Gunner 15x7 UTV Beadlock Wheel, Black/Machined (5x114.3)
• MRT Muscle Wheel Splined Lug Nut Kit, 12x1.50, Black (20 with Key)
• MRT Muscle Max UTV Beadlock Wheel, 15x7 & 15x10 (5x114.3)

Shop More

• UTV, Side by Side & ATV Wheels & Beadlock Wheels
• UTV Wheel Caps, Spacers & Studs
• UTV & ATV Tire Changing & Wheel Tools

Helpful Guides From the Witchdoctors Blog

• The Ultimate Buyer’s Guide to UTV & ATV Tires, Wheels & Valve Stems
• Polaris Tech Tip: The Benefits of Carrying a Spare Tire

Frequently Asked Questions

Will it fit my wheel?

Check the fit notes above.

How many do I need?

One per wheel; caps are sold individually.

Can I return it?

Unused items in original packaging can usually be returned. Contact our customer service team, and we’ll help.

Where to Ride

Air down and hit one of these off-road parks:

• Turkey Bay OHV Area at Land Between the Lakes (Golden Pond, Kentucky): about 100 miles of trails
• Paiute ATV Trail (central Utah): 250 miles of marked trail linking to 2,000+ more

Order the MRT Center Cap for Tail Gunner Gen 2 & Machine Gunner Wheels Today

Add it to your cart, and Witchdoctors will get it moving. Questions about fitment? Contact our team, and we’ll help.

Shipping

Qualifying Retail orders $159.99 or more will receive free ground shipping. Free Shipping Terms and conditions.

All orders over $500 will require a signature.

Please see International Shipping page for orders shipping outside the US.

See our full Shipping Policy page for further details.

Product Availability

We show real time product availability. These products normally ship the same business day but may ship from one of our warehouses across the country. If an item requires additional processing time you will be notified.

Returns

If your order arrives and it is not right, we will we'll fix it. We promise!

Doesn't fit or just not happy with it? You can return any new, unopened, unused or unaltered item within 30 days of delivery receipt of your item. We will issue a refund to your original payment method.

See our full Return Policy for all of the pertinent details.