u joint
Skip itBrand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.
Avg price
Incredible$22.85avg listing price — sweet spot $15–$100
Price range
Great$8.58–$65.84cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great400.98avg incumbent reviews — the moat a new listing must climb
Competition
Great38%top-5 click share — an open shelf
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$177K$177K/yr · 343K searches
Conversion
Okay2.3%search→purchase rate — share of searches ending in a sale
Growth
Bad-1.1%90-day search growth — must beat 0% to launch
Returns
Bad7.2%return rate — above 6% kills the launch gate
Brand share
Bad99%top-5 brand share — brand-locked demand
Competition
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.Brands
7 falling
Sellers
125
Top-5 brand share
99%
Open market
1%
- Spicer56%
- MOOG30%
- Champion6%
- GMB6%
- ACDelco1%
- boen1%
- Open — no brand owns it (1 brand, 1%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 43 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Spicer 5-153X U-Joint Kit 1310 Series (OSR)
Spicer$18.714.7★1,533 rev
MOOG 235 Greaseable Super Strength Universal Joint for Chevrolet Silverado 1500
MOOG$17.694.5★764 rev
Spicer 15-153X U-Joint Kit 1310 Series (OSR)
Spicer$12.864.4★250 rev
Spicer 5-178X U-Joint Kit 1350 Series (OSR)
Spicer$23.504.4★688 rev
MOOG 354 Greaseable Premium Universal Joint for Ford F-150
Champion$14.014.5★823 rev
Newest
by launch date
ACDelco Gold 45U0123 (19473228) Drive Shaft Universal Joint Kit
ACDelco$28.6126 rev
BOEN Universal Joint Socket Adapter Set | 3-Piece Ball Spring Design 1/2 3/8 and 1/4 U-Joint Drive | Chrome Vanadium Steel Universal Joint Set
boen$8.89392 rev
Front Prop Shaft U-Joint 2SET for Polaris RZR Ranger Sportsman General 1000 900 800 700 570 500 OEM# 2202015 2203703 3235500 3235616 3260104
JAVIK$13.74311 rev
Spicer 5-1350X U-Joint Kits - Pair of Two
Spicer$65.8461 rev
Spicer 25-178X U-Joint Kit 1350 Series (OSR)
Spicer$21.0826 rev
Trending
90-day click momentum
Spicer 5-3147X U-Joint Kit S44 Series (ISR)
Spicer$21.204.5★
MOOG 234 Non-Greaseable Super Strength Universal Joint for Chevrolet Silverado 1500
MOOG$17.744.3★
Spicer 5-1410-1X U-Joint Kit 1410/SPL36 Series (OSR)
Spicer$40.704.5★
GMB 210-0153 Universal Joint
GMB$8.584.3★
Spicer 15-153X U-Joint Kit 1310 Series (OSR)
Spicer$12.864.4★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -1.1% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fit great”
“The part seems well made, fit and finish are good”
“As advertised”
“Great deal”
“With a zerk you can grease I should be good for a long time”
“Works well”
“Very useful”
“Good durable parts”
“Heavy duty and well made”
“install isnt bad”
What buyers complain about
“they were just a little to wide to fit in between the yokes”
“Wrong description”
“Does not Fit i bought 3 non fit”
“Garbage”
“break when he tried to install them”
“and lo and behold, not even 4 oil changes in, I noticed that one of these is not getting grease purging out of all four caps”
“I got a used unit although I paid for a new one”
“will NOT work”
“Ordered two, one was missing a seal, the other showed up with the bearing cap already off and a little bit of rust inside that bearing cap”
“Nickel holding up a dollar”