trailer hub cap
Worth a lookShows searches that convert (11.2% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Conversion
Great11.2%search→purchase rate — share of searches ending in a sale
Growth
Great+73.8%90-day search growth — must beat 0% to launch
Price range
Good$5.18–$42.35cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good756.43avg incumbent reviews — the moat a new listing must climb
Returns
Good2.6%return rate — above 5% kills the launch gate
Competition
Good52%top-5 click share — leaders hold, buyers still browse
Avg price
Good$12.50avg listing price — sweet spot $15–$100
Market size
Good$331K$331K/yr · 235K searches
Brand share
Good74%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, trailer hub cap is a $331K/yr Amazon United States market (235K searches/yr). The top 5 brands hold 74% of demand. Demand peaks in May–Jun–Aug. Verdict: Worth a look — 61/100.
Data updated Jul 8, 2026 · scored weekly · How we score niches
trailer hub cap market data
- Units sold / yr
- 25K–30K
- avg 750–1,000/product
- Revenue / yr
- $313K–$375K
- units × avg price
- Conversion rate
- 11.2%
- Avg BSR
- #32
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 93%
- Out of stock
- 0.0%
- Avg brand age
- 43 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.Brands
17 falling
Sellers
41
Top-5 brand share
74%
Top 20: 100%
Top-5 click share
52%
Top 20: 90%
Open market
20%
- Bearing Buddy29%
- GREPSPUD12%
- iBroPrat12%
- SUNCARACCL12%
- JDMSPEED8%
- FDXGYH6%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +73.8% search growth over the last 90 days.Peak months: May, Jun, Aug · busiest ÷ quietest = 3.3×
Top trailer hub cap search terms
- bearing buddy caps50K/yr
- trailer bearing dust cap20K/yr
- trailer hub cap21K/yr
- trailer hub grease cap16K/yr
- trailer grease cap11K/yr
- bearing buddy rubber caps7K/yr
- trailer axle grease cap12K/yr
- trailer dust cap12K/yr
- trailer axle dust cap12K/yr
- buddy bearing caps9K/yr
Top trailer hub cap products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bearing Buddy Bra 19B - 1 Pair USA-Made Black Vinyl Covers - Protects and Keeps Grease Off the Trailer Wheels - Fits Models: 1980 1980A 1938 1968 2047 2080 & 2080T
Bearing Buddy$8.474.7★3,827 rev
SUNCARACCL 4 Pack Trailer Hub Cap Rubber Plugs Fits 1.98 Inch Trailer Hub Dust Caps Rubber Grease Plug for Most 2000 to 3500 Pound Dexter EZ Lube Trailer Camper Axle
SUNCARACCL$5.444.6★623 rev
iBroPrat 2pcs Trailer Axle Dust Cap Cup Grease Cover 1.98 Hub with Extra 2 Rubber Plugs Trailer Axle Wheel Hub and Bearing Dust Cap for Most 2000 to 3500 Pound Axles Dexter
iBroPrat$7.974.4★904 rev
GREPSPUD 4pcs 1.98 Trailer Hub Dust Caps Trailer Spindle Bearing Dust Cap Cup Grease Cover Caps & Extra Rubber Plugs for 2000 to 3500 lb Boat Trailer Dexter EZ Lube Trailer Camper RV Axle
GREPSPUD$9.914.6★1,428 rev
FDXGYH 4 Pcs 1.98-Inch Bearing Bars Cover Bearing Rubber Caps Trailer Wheel Hub Dust Covers Replacement Bearing Protector (Black)
FDXGYH$8.954.5★275 rev
Newest
by launch date
AIUWIZO 1.98 Trailer Axle Dust Cap Cup 4PCS Grease Caps with 4 Extra Rubber Plugs Trailer Hub Bearing Dust Cap for 2000-3500 lb Trailers Axle Wheel Hub
AIUWIZO$7.3137 rev
OZISENS 2pcs 1.98 Trailer Hub Dust Caps Bearing Center Replacement Trailer Cup Trailer Hub Grease Cap for Most 2000 to 3500 Ib Boat Trailer Dexter EZ Lube
OZISENS$7.0442 rev
Trailer Hub Cap Plugs Grease Rubber Plugs for 1.98/2.44/2.72 Trailer Axle Cap Trailer Dust Bearing Cap Cup for Most 2000 to 3500 Pound Trailer RV Camper Wheel Cover Axle 4 Pcs
RXALASKA$5.18199 rev
MorningRo 2 Pcs 1.98 Axle Grease Cap Trailer Hub Dust Caps Grease Fitting Caps for Most Standard 2000 to 3500 Pound Axles
MorningRo$14.02109 rev
COMVERIX 1.98 Trailer Hub Caps (4PCS) with Rubber Plugs & Installation Tool Snug-Fit Rust-Resistant Bearing Dust Caps for 2000-3500 lb Axles Protects Trailer Hubs from Dirt and Moisture
COMVERIX$10.77144 rev
Trending
90-day click momentum
Bearing Buddy Caps - Trailer Hub Cap Protector for Trailers Stainless Steel Buddy Bearing Caps of 1.980 Diameter -Bearing Buddies for Trailers to Keep Water Dirt out of Hub and Bearings
Bearing Buddy$42.354.7★
AIUWIZO 1.98 Trailer Axle Dust Cap Cup 4PCS Grease Caps with 4 Extra Rubber Plugs Trailer Hub Bearing Dust Cap for 2000-3500 lb Trailers Axle Wheel Hub
AIUWIZO$7.314.8★
Bearing Buddy Bra 17B - 1 Pair USA-Made Black Vinyl Covers - Protects and Keeps Grease Off the Trailer Wheels - Fits Models: 1781 1810
Bearing Buddy$8.654.7★
OZISENS 2pcs 1.98 Trailer Hub Dust Caps Bearing Center Replacement Trailer Cup Trailer Hub Grease Cap for Most 2000 to 3500 Ib Boat Trailer Dexter EZ Lube
OZISENS$7.044.6★
Bearing Buddy 1980A-SS - USA-Made Stainless Steel Bearing Protector w/ 19B Bra & Blue Grease Indicator - Trailer Hub Grease Cap Replacement for Boats RVs & More - Fits Hubs w/ 1.980 Inside Diameter
Bearing Buddy$38.544.8★
What buyers say about trailer hub cap
What buyers praise and complain about, mined from review topics.What buyers love
“Correct fit”
“GREAT QUALITY”
“As advertised”
“Great value”
“Easy install”
“works well”
“Easy to use”
“Keeps grease off wheels”
“Durability is good”
“Solid build”
What buyers complain about
“Too big”
“Pure junk”
“After a half an hour of screwing around trying to get these installed”
“Sometimes they can be kind of hard to get in”
“the cover popped off”
“Go on hard”
“Little pricey i couldn't find anywhere in my area”
“Dont waste your money bass pro has some for 20”
“Does not fit Dexter 3500lb ez lube hub 008-248-05”
“Would not go into the hub”
Top return reasons
Common questions
- Is trailer hub cap profitable to sell on Amazon United States?
- The niche generates $331K/yr across 28 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +73.8%. Flapen's verdict: Worth a look (61/100).
- How competitive is the trailer hub cap niche?
- 17 brands and 41 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 74% of demand.
- What do buyers complain about in trailer hub cap?
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Assembly/Installation. The return rate is 2.6%.
- When does demand for trailer hub cap peak?
- Demand peaks in May–Jun–Aug; the busiest month runs 3.3× the quietest.
- What does it cost to enter the trailer hub cap niche?
- Listings span $5.18–$42.35; the average listing price is $12.50 (sweet spot $15–$100). The average incumbent carries 756 reviews — the moat a new listing must climb.