shim kit
Skip itSoft demand (-8.0% this quarter) — this niche doesn't clear our bar today.
Review moat
Great144.32avg incumbent reviews — the moat a new listing must climb
Avg price
Great$54.09avg listing price — sweet spot $15–$100
Returns
Good2.5%return rate — above 6% kills the launch gate
Conversion
Good4.5%search→purchase rate — share of searches ending in a sale
Competition
Good54%top-5 click share — leaders hold, buyers still browse
Price range
Okay$10.03–$228.97cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Market size
Okay$103K$103K/yr · 42K searches
Growth
Bad-8.0%90-day search growth — must beat 0% to launch
Competition
The top 5 products take 54% of clicks — established leaders, but buyers still shop beyond them.Brands
14 flat
Sellers
38
Top-5 brand share
83%
Open market
13%
- Hot Cams40%
- TACSHIM29%
- MUYIDP6%
- PROOTOM5%
- Easily4%
- GtohHavea3%
- Open — no brand owns it (8 brands, 13%)
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 28 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Hot Cams 7.48mm Complete Shim Kit HCSHIM01 for Honda CRF Kawasaki KX Suzuki RMZ Yamaha WR YZ Dirt Bikes
Hot Cams$86.104.7★917 rev
Hot Cams 9.48mm Complete Shim Kit HCSHIM02 for Arctic Cat DVX 400 ATV Honda TRX ATV Kawasaki KFX ATV Suzuki LT-R ATV Yamaha YFZ ATV Regular
Hot Cams$81.894.6★918 rev
TACSHIM Black 1/2x28 Barrel Shim Kit for .223 5.56 (14 Pack)
TACSHIM$14.014.7★185 rev
47Pcs 7.48mm Valve Shim Kit for Honda CRF 250R/X Kawasaki KX 250F Suzuki RMZ 250 Yamaha YZ 250F WR 250F Dirt Bikes
MUYIDP$27.954.6★92 rev
TACSHIM Black 5/8x24 Barrel Shim Kit for .308 7.62mm 300BLK .30 Cal (14 Pack)
TACSHIM$14.044.7★134 rev
Newest
by launch date
100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box
Shark Tears$87.7831 rev
304 Stainless Steel Shim Kit 100 PCS 2 x 2 Slotted Shims Assortment 10 Thicknesses for Machine Leveling Motor Alignment & Equipment Adjustment Laser-Marked Sizes with Storage Case
GtohHavea$86.6255 rev
304 Stainless Steel Shim Kit 60 PCS 2 x 2 Slotted Shims Assortment 6 Thicknesses for Machine Leveling Motor Alignment & Equipment Adjustment Laser-Marked Sizes with Storage Case
GtohHavea$45.0355 rev
156 Pcs Size A 2 x 2 Stainless Steel Slotted Shims Kit Metal Shim Stock for Leveling Precision Shims Assortment with Feeler Gauge and Storage Box Shim Kit for Furniture Machinist Motor Shop
Nalwort$139.577 rev
Shimeyao 80 Pcs Size A 2 x 2 Stainless Steel Slotted Shims Kit Composite Precision Metal Shims Stock for Leveling Assortment with Storage Box 8 or 13 Thicknesses for Machinist Motor Shop Wood Door
Shimeyao$89.0523 rev
Trending
90-day click momentum156 Pcs Size A 2 x 2 Stainless Steel Slotted Shims Kit Metal Shim Stock for Leveling Precision Shims Assortment with Feeler Gauge and Storage Box Shim Kit for Furniture Machinist Motor Shop
Nalwort$139.574.0★
304 Stainless Steel Shim Kit 100 PCS 2 x 2 Slotted Shims Assortment 10 Thicknesses for Machine Leveling Motor Alignment & Equipment Adjustment Laser-Marked Sizes with Storage Case
GtohHavea$86.624.5★
304 Stainless Steel Shim Kit 60 PCS 2 x 2 Slotted Shims Assortment 6 Thicknesses for Machine Leveling Motor Alignment & Equipment Adjustment Laser-Marked Sizes with Storage Case
GtohHavea$45.034.5★
AWSZH Adjustable Valve Shim Kit 7.48mm Compatible with Honda CRF250X 2004-2017 Kawasaki KLX250 1979-1980 Suzuki TL1000S 1997-2001 Yamaha FZS600 FZ6 2004-2007 Yamaha YZF-R6 1999-2009 Dirt Bikes(47Pcs)
AWSZH$33.224.3★
100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box
Shark Tears$87.784.4★
Demand & seasonality
Weekly Amazon search volume, last 62 weeks — -8.0% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.4×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Well manufactured kit”
“Fits perfectly”
“Works as advertised”
“Good Value”
“There are other uses for these”
“which is convenient”
“Perfect for timing AR muzzle devices”
“Thickness accurate”
“Shims work just as they should”
“Works perfect for AR”
What buyers complain about
“Thickness variations are noticeable”
“Do not believe the description”
“Does not fit all barrels”
“I was extremely disappointed with the quality control”
“There is no way to adjust the shims because there is no way to make a”
“They are, however, a bit finnicky to use”
“WON'T WORK ON ITEMAS”
“It bent easily during installation”