---
title: "shim kit — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/shim-kit"
last_updated: "2026-07-13T20:02:51.049Z"
locale: en
meta:
  description: "soft demand (-8.0% this quarter) — shim kit doesn't clear our bar today."
  "og:description": "soft demand (-8.0% this quarter) — shim kit doesn't clear our bar today."
  "og:title": "shim kit — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **shim kit**

**Skip it**

Soft demand (-8.0% this quarter) — this niche doesn't clear our bar today.

Market size 25Growth 21Conversion 54Competition 52Returns 62Price range 39Avg price 92Brand share 36Review moat 93Quality gap 27

**Review moat**

**Great****144.32**

avg incumbent reviews — the moat a new listing must climb

**Avg price**

**Great****$54.09**

avg listing price — sweet spot $15–$100

**Returns**

**Good****2.5%**

return rate — above 6% kills the launch gate

**Conversion**

**Good****4.5%**

search→purchase rate — share of searches ending in a sale

**Competition**

**Good****54%**

top-5 click share — leaders hold, buyers still browse

**Price range**

**Okay****$10.03–$228.97**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Brand share**

**Okay****83%**

top-5 brand share — brands hold most of the demand

**Quality gap**

**Okay****4.6★**

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.

0%5%$5K10%$10K15%$15K20%$21K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 28 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Hot Cams 7.48mm Complete Shim Kit HCSHIM01 for Honda CRF Kawasaki KX Suzuki RMZ Yamaha WR YZ Dirt Bikes](https://m.media-amazon.com/images/I/41H+SX9sqnL.jpg)**Hot Cams 7.48mm Complete Shim Kit HCSHIM01 for Honda CRF Kawasaki KX Suzuki RMZ Yamaha WR YZ Dirt Bikes**Hot Cams**$86.10**4.7★917 rev](https://www.amazon.com/dp/B000UKM6LG) [2![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](https://m.media-amazon.com/images/I/411whuw3E5L.jpg)**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**$81.89**4.6★918 rev](https://www.amazon.com/dp/B000UKHCM4) [3![TACSHIM Black 1/2x28 Barrel Shim Kit for .223 5.56 (14 Pack)](https://m.media-amazon.com/images/I/412v1GIBGdL.jpg)**TACSHIM Black 1/2x28 Barrel Shim Kit for .223 5.56 (14 Pack)**TACSHIM**$14.01**4.7★185 rev](https://www.amazon.com/dp/B0CY56H259) [4![47Pcs 7.48mm Valve Shim Kit for Honda CRF 250R/X Kawasaki KX 250F Suzuki RMZ 250 Yamaha YZ 250F WR 250F Dirt Bikes](https://m.media-amazon.com/images/I/51qoIAxTW+L.jpg)**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**$27.95**4.6★92 rev](https://www.amazon.com/dp/B09NCS421T) [5![TACSHIM Black 5/8x24 Barrel Shim Kit for .308 7.62mm 300BLK .30 Cal (14 Pack)](https://m.media-amazon.com/images/I/41jgOFUCkcL.jpg)**TACSHIM Black 5/8x24 Barrel Shim Kit for .308 7.62mm 300BLK .30 Cal (14 Pack)**TACSHIM**$14.04**4.7★134 rev](https://www.amazon.com/dp/B0CY5GKKM9)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box](https://m.media-amazon.com/images/I/410nEBGfXTL.jpg)**100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box**Shark Tears**$87.78**31 rev1w ago](https://www.amazon.com/dp/B0G64MYG3F) [![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](https://m.media-amazon.com/images/I/418gR+wvv0L.jpg)**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**$86.62**55 rev6mo ago](https://www.amazon.com/dp/B0GCDMH768) [![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](https://m.media-amazon.com/images/I/41+oYOnocYL.jpg)**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**$45.03**55 rev6mo ago](https://www.amazon.com/dp/B0GCCDTK7B) [![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](https://m.media-amazon.com/images/I/41x+qxXxPVL.jpg)**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**$139.57**7 rev6mo ago](https://www.amazon.com/dp/B0GBWVJ8W4) [![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](https://m.media-amazon.com/images/I/01RmK+J4pJL.gif)**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**$89.05**23 rev1y ago](https://www.amazon.com/dp/B0F93TJR43)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![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](https://m.media-amazon.com/images/I/41x+qxXxPVL.jpg)**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**$139.57**4.0★**▲ 256%**](https://www.amazon.com/dp/B0GBWVJ8W4) [![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](https://m.media-amazon.com/images/I/418gR+wvv0L.jpg)**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**$86.62**4.5★**▲ 249%**](https://www.amazon.com/dp/B0GCDMH768) [![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](https://m.media-amazon.com/images/I/41+oYOnocYL.jpg)**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**$45.03**4.5★**▲ 241%**](https://www.amazon.com/dp/B0GCCDTK7B) [![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)](https://m.media-amazon.com/images/I/41N12dx6WZL.jpg)**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**$33.22**4.3★**▲ 172%**](https://www.amazon.com/dp/B0D95G8GPL) [![100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box](https://m.media-amazon.com/images/I/410nEBGfXTL.jpg)**100PCS 304 Stainless Steel Shim Kit 2 x 2 Slotted Assortment Box**Shark Tears**$87.78**4.4★**▲ 150%**](https://www.amazon.com/dp/B0G64MYG3F)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 62 weeks — -8.0% search growth over the last 90 days.

800600Spike '25Spike '26 seasonMayJunJulAugSepOctNovDecJanFebMarAprMayJun

No pronounced peak months · busiest ÷ quietest = 1.4×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Quality-Overall**21%

*“Well manufactured kit”*

**Size-Overall**18%

*“Fits perfectly”*

**Advertised Vs Actual Product**15%

*“Works as advertised”*

**Value For Money**11%

*“Good Value”*

**Efficiency**5%

*“There are other uses for these”*

**Ease Of Use**5%

*“which is convenient”*

**Functionality-Overall**4%

*“Perfect for timing AR muzzle devices”*

**Thickness**3%

*“Thickness accurate”*

**Stiffness**2%

*“Shims work just as they should”*

**Compatibility-Overall**2%

*“Works perfect for AR”*

### **What buyers complain about **

**Thickness**21%

*“Thickness variations are noticeable”*

**Advertised Vs Actual Product**12%

*“Do not believe the description”*

**Size-Overall**12%

*“Does not fit all barrels”*

**Quality-Overall**10%

*“I was extremely disappointed with the quality control”*

**Adjustability/Rotatability/Reclining**8%

*“There is no way to adjust the shims because there is no way to make a”*

**Ease Of Use**4%

*“They are, however, a bit finnicky to use”*

**Compatibility-Overall**4%

*“WON'T WORK ON ITEMAS”*

**Assembly/Installation**3%

*“It bent easily during installation”*

### **Top return reasons **

**Size-Overall**53%

**Advertised Vs Actual Product**9%

**Defective Material/Parts**8%

**Compatibility-Overall**7%

**Value For Money**6%

**Functionality-Overall**3%

**Thin**3%

**Thickness**3%

**Ease Of Use**2%

**Quality-Overall**1%