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5Lug/3500# Universal Sport Kit


Model # 7771942 | Mfg # AT-35US
In stock online.
Keep corrosive water and contaminants off your bearings with an airtight hub chamber. Features an easy to install diaphragm that is pressurized with a hand pump to 5-10psi. Positive pressure keeps bearings in good working order, allows you to see at a glance if you have a positive seal and future bearing failures can be immediately detected. Universal kit comes with three different inner dimension size shims and eliminates the need to measure your spindle.
  • Includes a chrome air cap, stainless steel bushing, Super seal™, diaphragm, sport needle, bonding agent and shims
  • One kit per hub

5Lug/3500# Universal Sport Kit

Type Bearings

West Advisor

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by PowerReviews
Air Tight 5Lug/3500# Universal Sport Kit

(based on 1 review)

Ratings Distribution

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Reviewed by 1 customer

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(1 of 1 customers found this review helpful)


awesome product!

By Holiday Routine

from Virginia Beach, VA

About Me Experienced trailerboater, Family boater, Freshwater angler, Saltwater angler, Wakeboarder

Verified Buyer


  • Better than standard equipment
  • Durable, corrosion resistant
  • Reduces maintenance


    Best Uses

    • Inflatable boats
    • Jon boats, aluminum boats
    • Just for storage
    • Long distance towing
    • Ramp launching

    Comments about Air Tight 5Lug/3500# Universal Sport Kit:

    Best bearing protector on the market! Not sure why anybody would buy a bearing Buddy still.

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