---
title: "18x8.50-8 tube — Niche Verdict: Skip it (45/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/18x8-50-8-tube"
last_updated: "2026-07-10T02:46:30.012Z"
locale: en
meta:
  description: "a small market ($44K/yr) — 18x8.50-8 tube doesn't clear our bar today."
  "og:description": "a small market ($44K/yr) — 18x8.50-8 tube doesn't clear our bar today."
  "og:title": "18x8.50-8 tube — Niche Verdict: Skip it (45/100) | Amazon United States - Flapen"
---

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# **18x8.50-8 tube**

**Skip it****45/100 **

a small market ($44K/yr) — 18x8.50-8 tube doesn't clear our bar today.

**Market/yr**

**$44K**

**Growth (1y)**

**+208.0%**

**Products**

**14**

**Brands**

**13**

was 12 a year ago

**Sellers**

**15**

**Price range**

**$14.25–$24.12**

**Returns**

**2.3%**

**Rating**

**4.4★**

**Skip it**

Scored 45/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**2**

 ×0.30

Growth

**78**

 ×0.30

Competition

**39**

 ×0.20

Quality gap

**48**

 ×0.10

Returns

**82**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 102 weeks — +208.0% year over year.

588294Spike '25Prime Day '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

Peak months: Apr, May, Jun, Jul, Aug · busiest ÷ quietest = 4.8×

## **Competition**

- AR-PRO33% - CALU LUKY15% - FVRITO8% - SPORTYOUTH8% - GICOOL8% - weyleity7% - Other (7 brands)22%

The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them. 13 brands and 15 sellers compete here.

**Brands**

**13 **▲rising

was 12 a year ago

**Sellers**

**15**

**Top 5 brand share**

**72%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![18x8.50/9.50-8 Replacement Inner Tube with TR-13 Valve Stem (2-Pack) - For Golf Cart/Tractor/Lawn Mower and More](https://m.media-amazon.com/images/I/41X+6Zk8OEL.jpg) [**18x8.50/9.50-8 Replacement Inner Tube with TR-13 Valve Stem (2-Pack) - For Golf Cart/Tractor/Lawn Mower and More**](https://www.amazon.com/dp/B082B6R3VB)

AR-PRO$24.124.3★20,28525%▼falling

2
![18x8.50-8/18x9.50-8 Inner Tube with TR-13 Valve Stem - 18x8.50/9.50-8 Replacement Inner Tube For Golf Cart Tractor Lawn Mower Hand Trucks Wheelbarrows and More (2-Pack)](https://m.media-amazon.com/images/I/41HE0XRW3LL.jpg) [**18x8.50-8/18x9.50-8 Inner Tube with TR-13 Valve Stem - 18x8.50/9.50-8 Replacement Inner Tube For Golf Cart Tractor Lawn Mower Hand Trucks Wheelbarrows and More (2-Pack)**](https://www.amazon.com/dp/B0BDD2DVGR)

CALU LUKY$22.994.6★23015%▲rising

3
![FVRITO 18x8.50-8 18x9.50-8 Inner Tube for ATV Quad 4 Wheeler Go Kart Lawn Tractor Snow Blower Golf Cart Garden Trailer Heavy Duty Lawn Mower Turf With TR-13 Straight Valve Stem 2 Pack](https://m.media-amazon.com/images/I/41IjQP-15mL.jpg) [**FVRITO 18x8.50-8 18x9.50-8 Inner Tube for ATV Quad 4 Wheeler Go Kart Lawn Tractor Snow Blower Golf Cart Garden Trailer Heavy Duty Lawn Mower Turf With TR-13 Straight Valve Stem 2 Pack**](https://www.amazon.com/dp/B094QXRHSR)

FVRITO$23.324.5★6058%▼falling

4
![18x8.50-8 18x9.50-8 Inner Tubes 2 Pack Heavy Duty Replacement Tire Inner Tubes with Straight Valve Stem for Lawn Mowers Wheelbarrows ATVs Go Karts Tractors Snow Blowers Golf Carts Trailers](https://m.media-amazon.com/images/I/41+EVQ353bL.jpg) [**18x8.50-8 18x9.50-8 Inner Tubes 2 Pack Heavy Duty Replacement Tire Inner Tubes with Straight Valve Stem for Lawn Mowers Wheelbarrows ATVs Go Karts Tractors Snow Blowers Golf Carts Trailers**](https://www.amazon.com/dp/B0CH9PD9MR)

SPORTYOUTH$22.194.4★1,2608%▼falling

5
![GICOOL 18x8.50/9.50-8 Inner Tubes 2 Pack with TR13 Valve Stem Heavy-Duty Replacement Tubes for Lawn Mowers Tractors Golf Carts Scooters Go Karts Wagons Trailers ATVs Snow Blowers](https://m.media-amazon.com/images/I/4165GJTchbL.jpg) [**GICOOL 18x8.50/9.50-8 Inner Tubes 2 Pack with TR13 Valve Stem Heavy-Duty Replacement Tubes for Lawn Mowers Tractors Golf Carts Scooters Go Karts Wagons Trailers ATVs Snow Blowers**](https://www.amazon.com/dp/B0DMSGVYZH)

GICOOL$22.474.4★1,1748%▲rising

6
![AR-PRO Replacement 18x8.50-8 18x9.50-8 Inner Tubes for Golf Cart ATV UTV Lawn Tractor Garden Trailer Snow Blowers and More - with TR-13 Straight Valve Stems - Made from Durable Butyl Rubber](https://m.media-amazon.com/images/I/41OiaCzj+eL.jpg) [**AR-PRO Replacement 18x8.50-8 18x9.50-8 Inner Tubes for Golf Cart ATV UTV Lawn Tractor Garden Trailer Snow Blowers and More - with TR-13 Straight Valve Stems - Made from Durable Butyl Rubber**](https://www.amazon.com/dp/B0F4883CTN)

AR-PRO$16.044.4★3317%▲rising

7
![weyleity 2 Pack 18x8.50-8 18x9.50-8 Inner Tube | Heavy Duty Replacement Tire Tubes with TR13 Straight Valve Stem for Go Karts ATVs (18x8.5/9.5-8 TR13)](https://m.media-amazon.com/images/I/41My6sMkuVL.jpg) [**weyleity 2 Pack 18x8.50-8 18x9.50-8 Inner Tube | Heavy Duty Replacement Tire Tubes with TR13 Straight Valve Stem for Go Karts ATVs (18x8.5/9.5-8 TR13)**](https://www.amazon.com/dp/B0FH9FB1YH)

weyleity$18.944.4★1557%▲rising

8
![FLKQC 2 Pack 18X8.50/9.50-8 Inner Tubes with TR-13 Valve Stem Replacement Lawn Mower Tire Tubes for Tractors Wheelbarrows ATVs Go Karts & More (Fits 8.5 to 9.5 Wide)](https://m.media-amazon.com/images/I/41jEhCstj7L.jpg) [**FLKQC 2 Pack 18X8.50/9.50-8 Inner Tubes with TR-13 Valve Stem Replacement Lawn Mower Tire Tubes for Tractors Wheelbarrows ATVs Go Karts & More (Fits 8.5 to 9.5 Wide)**](https://www.amazon.com/dp/B0G5NFZ2NN)

FLKQC$18.364.4★296%▲rising

9
![18x8.50-8/18x9.50-8 Inner tube replacement parts equipped with TR-13 valve stem suitable for lawn mowers Wheelbarrows Hand Trucks Carts lawn and garden inner tubes (pack of 2)](https://m.media-amazon.com/images/I/41bunbGyukS.jpg) [**18x8.50-8/18x9.50-8 Inner tube replacement parts equipped with TR-13 valve stem suitable for lawn mowers Wheelbarrows Hand Trucks Carts lawn and garden inner tubes (pack of 2)**](https://www.amazon.com/dp/B0981Q5NRP)

mycheng$21.154.6★895%▼falling

10

![AMGSH 1 Pack 18x8.50/9.50-8 Inner Tubes High Duty 18x6.50-8 18x7.50-8 18x8.50-8 18x9.50-8 20x8-8 20x10-8 Universal Fit Tire Tube with TR13 Straight Valve Stem](https://m.media-amazon.com/images/I/4131eW4VrVL.jpg) [**AMGSH 1 Pack 18x8.50/9.50-8 Inner Tubes High Duty 18x6.50-8 18x7.50-8 18x8.50-8 18x9.50-8 20x8-8 20x10-8 Universal Fit Tire Tube with TR13 Straight Valve Stem**](https://www.amazon.com/dp/B0FH232LJM)

AMGSH$14.254.4★304%▲rising

11

![NATGAI 2 Pack 18x8.50-8 18x9.50-8 Inner Tubes Replacement Tire Tube with TR-13 Straight Valve Stem Fits Lawn Mowers Yard Tractors Go Karts Golf Carts ATVs Wheelbarrows Hand Trucks](https://m.media-amazon.com/images/I/41dLLDTUYpL.jpg) [**NATGAI 2 Pack 18x8.50-8 18x9.50-8 Inner Tubes Replacement Tire Tube with TR-13 Straight Valve Stem Fits Lawn Mowers Yard Tractors Go Karts Golf Carts ATVs Wheelbarrows Hand Trucks**](https://www.amazon.com/dp/B0FX9BXN5R)

NATGAI$19.204.1★182%▲rising

12

![18x8.50-8 18x9.50-8 Lawn Mowers Tubes with TR13 Straight Valve Stem Heavy Duty Replacement Inner Tubes for Garden Trailer Tractor Golf Cart](https://m.media-amazon.com/images/I/41RlK9+XraL.jpg) [**18x8.50-8 18x9.50-8 Lawn Mowers Tubes with TR13 Straight Valve Stem Heavy Duty Replacement Inner Tubes for Garden Trailer Tractor Golf Cart**](https://www.amazon.com/dp/B0FMK5399R)

SIMEIQI$20.794.4★4862%▲rising

13

![18x8.50-8/18x9.50-8 Inner Tube Replacement for Mowers Hand Trucks Wheelbarrows Carts Premium Lawn and Garden Inner Tube (2-Pack)](https://m.media-amazon.com/images/I/41Jdpesx6KL.jpg) [**18x8.50-8/18x9.50-8 Inner Tube Replacement for Mowers Hand Trucks Wheelbarrows Carts Premium Lawn and Garden Inner Tube (2-Pack)**](https://www.amazon.com/dp/B088FLLBWC)

KAKO$23.304.3★5391%▼falling

14

![RONPOW 18x8.50-8 & 18x9.50-8 Inner Tube TR-13 Straight Valve Stem Heavy-Duty 18x8.50-8 & 18x9.50-8 Lawn Mower Tires Tubes Fits Riding Mowers Yard Trailers Garden Tractors ATVs 2 Pack](https://m.media-amazon.com/images/I/51IsVkTZMiL.jpg) [**RONPOW 18x8.50-8 & 18x9.50-8 Inner Tube TR-13 Straight Valve Stem Heavy-Duty 18x8.50-8 & 18x9.50-8 Lawn Mower Tires Tubes Fits Riding Mowers Yard Trailers Garden Tractors ATVs 2 Pack**](https://www.amazon.com/dp/B0FKGKPLVG)

RONPOW$22.474.7★471%▲rising

## **Product shelf**

All 14 tracked products in this niche.

Top sellersNewestTrending

[![18x8.50/9.50-8 Replacement Inner Tube with TR-13 Valve Stem (2-Pack) - For Golf Cart/Tractor/Lawn Mower and More](https://m.media-amazon.com/images/I/41X+6Zk8OEL.jpg)**18x8.50/9.50-8 Replacement Inner Tube with TR-13 Valve Stem (2-Pack) - For Golf Cart/Tractor/Lawn Mower and More** AR-PRO**$24.12**4.3★20,285 reviews](https://www.amazon.com/dp/B082B6R3VB) [![18x8.50-8/18x9.50-8 Inner Tube with TR-13 Valve Stem - 18x8.50/9.50-8 Replacement Inner Tube For Golf Cart Tractor Lawn Mower Hand Trucks Wheelbarrows and More (2-Pack)](https://m.media-amazon.com/images/I/41HE0XRW3LL.jpg)**18x8.50-8/18x9.50-8 Inner Tube with TR-13 Valve Stem - 18x8.50/9.50-8 Replacement Inner Tube For Golf Cart Tractor Lawn Mower Hand Trucks Wheelbarrows and More (2-Pack)** CALU LUKY**$22.99**4.6★230 reviews](https://www.amazon.com/dp/B0BDD2DVGR) [![FVRITO 18x8.50-8 18x9.50-8 Inner Tube for ATV Quad 4 Wheeler Go Kart Lawn Tractor Snow Blower Golf Cart Garden Trailer Heavy Duty Lawn Mower Turf With TR-13 Straight Valve Stem 2 Pack](https://m.media-amazon.com/images/I/41IjQP-15mL.jpg)**FVRITO 18x8.50-8 18x9.50-8 Inner Tube for ATV Quad 4 Wheeler Go Kart Lawn Tractor Snow Blower Golf Cart Garden Trailer Heavy Duty Lawn Mower Turf With TR-13 Straight Valve Stem 2 Pack** FVRITO**$23.32**4.5★605 reviews](https://www.amazon.com/dp/B094QXRHSR) [![18x8.50-8 18x9.50-8 Inner Tubes 2 Pack Heavy Duty Replacement Tire Inner Tubes with Straight Valve Stem for Lawn Mowers Wheelbarrows ATVs Go Karts Tractors Snow Blowers Golf Carts Trailers](https://m.media-amazon.com/images/I/41+EVQ353bL.jpg)**18x8.50-8 18x9.50-8 Inner Tubes 2 Pack Heavy Duty Replacement Tire Inner Tubes with Straight Valve Stem for Lawn Mowers Wheelbarrows ATVs Go Karts Tractors Snow Blowers Golf Carts Trailers** SPORTYOUTH**$22.19**4.4★1,260 reviews](https://www.amazon.com/dp/B0CH9PD9MR) [![GICOOL 18x8.50/9.50-8 Inner Tubes 2 Pack with TR13 Valve Stem Heavy-Duty Replacement Tubes for Lawn Mowers Tractors Golf Carts Scooters Go Karts Wagons Trailers ATVs Snow Blowers](https://m.media-amazon.com/images/I/4165GJTchbL.jpg)**GICOOL 18x8.50/9.50-8 Inner Tubes 2 Pack with TR13 Valve Stem Heavy-Duty Replacement Tubes for Lawn Mowers Tractors Golf Carts Scooters Go Karts Wagons Trailers ATVs Snow Blowers** GICOOL**$22.47**4.4★1,174 reviews](https://www.amazon.com/dp/B0DMSGVYZH) [![AR-PRO Replacement 18x8.50-8 18x9.50-8 Inner Tubes for Golf Cart ATV UTV Lawn Tractor Garden Trailer Snow Blowers and More - with TR-13 Straight Valve Stems - Made from Durable Butyl Rubber](https://m.media-amazon.com/images/I/41OiaCzj+eL.jpg)**AR-PRO Replacement 18x8.50-8 18x9.50-8 Inner Tubes for Golf Cart ATV UTV Lawn Tractor Garden Trailer Snow Blowers and More - with TR-13 Straight Valve Stems - Made from Durable Butyl Rubber** AR-PRO**$16.04**4.4★331 reviews](https://www.amazon.com/dp/B0F4883CTN) [![weyleity 2 Pack 18x8.50-8 18x9.50-8 Inner Tube | Heavy Duty Replacement Tire Tubes with TR13 Straight Valve Stem for Go Karts ATVs (18x8.5/9.5-8 TR13)](https://m.media-amazon.com/images/I/41My6sMkuVL.jpg)**weyleity 2 Pack 18x8.50-8 18x9.50-8 Inner Tube | Heavy Duty Replacement Tire Tubes with TR13 Straight Valve Stem for Go Karts ATVs (18x8.5/9.5-8 TR13)** weyleity**$18.94**4.4★155 reviews](https://www.amazon.com/dp/B0FH9FB1YH) [![FLKQC 2 Pack 18X8.50/9.50-8 Inner Tubes with TR-13 Valve Stem Replacement Lawn Mower Tire Tubes for Tractors Wheelbarrows ATVs Go Karts & More (Fits 8.5 to 9.5 Wide)](https://m.media-amazon.com/images/I/41jEhCstj7L.jpg)**FLKQC 2 Pack 18X8.50/9.50-8 Inner Tubes with TR-13 Valve Stem Replacement Lawn Mower Tire Tubes for Tractors Wheelbarrows ATVs Go Karts & More (Fits 8.5 to 9.5 Wide)** FLKQC**$18.36**4.4★29 reviews](https://www.amazon.com/dp/B0G5NFZ2NN)

## **Reviews**

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

### **What buyers love **

**Value For Money**24%

*“Good value”*

**Quality-Overall**22%

*“Good Quality”*

**Size-Overall**18%

*“Great fit”*

**Advertised Vs Actual Product**13%

*“Works as should”*

**Weight Heavy**7%

*“These are definitely heavy duty”*

**Durability**4%

*“Durable & Fit Great”*

**Assembly/Installation**3%

*“were easy to install”*

**Thickness**3%

*“The material feels thick”*

**Design-Overall**2%

*“Works as designed”*

**Tread Pattern Pitch**2%

*“beats buying new tires when the tread is still good”*

### **What buyers complain about **

**Quality-Overall**51%

*“Tubes are pure garbage”*

**Durability**15%

*“the valve stem broke off near the base when I was inserting it through the hole in the rim”*

**Functionality-Overall**11%

*“DID NOT HOLD AIR”*

**Size-Overall**7%

*“Does not fit as stated”*

**Thickness**7%

*“They are a bit more challenging because of the thickness when installing”*

**Strength**5%

*“brittle or something or very low quality”*

**Assembly/Installation**4%

*“Valve stem broke when trying to install”*

#### **Top return reasons**- Size-Overall70% - Functionality-Overall5% - Value For Money5% - Compatibility-Overall5% - Assembly/Installation4% - Advertised Vs Actual Product2% - Maintenance And Repair1% - Pressure1% - Quality-Overall1% - Strength1%