18x8.50-8 Tube
MaybeBuyers convert on 16.8% of searches. But shoppers spend an estimated $44K a year here, so 18x8.50-8 Tube is a Maybe.
- Flapen Score
- 60 / 100Top 9% of 7,287 Automotive niches · +11 vs the category median of 4960
- Market size
- $44K/yr13K searches / yr
- 90-day growth
- +107.9%search demand this quarter
- Competition
- 64%top-5 click share · 13 brands · 15 sellers
Flapen Score
18x8.50-8 Tube against its category
The dotted line is the Automotive average. Past it, 18x8.50-8 Tube is stronger. Inside it, weaker.
Market
The 18x8.50-8 Tube market on Amazon at a glance
Shoppers on Amazon United States searched for 18x8.50-8 Tube 13K times last year and spent an estimated $44K. The top 5 brands take 72% of clicks. Demand peaks in Apr–May–Jun–Jul–Aug. Flapen scores it 60 out of 100, a Maybe.
01 · Demand
An estimated 16.8% of those searches ended in a purchase.
Shoppers searched for this 13K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 16.8% of those searches ended in a purchase. Searches in the last 90 days moved +107.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated $44K a year.
- Searches, last 12 months
- 13K
- Growth, 90 days vs prior 90
- +107.9%
- Conversion, latest week
- 16.8%
- Market size, estimated
- $44Ka year
- Peak month
- April4.8× the quietest month
- Top search term
- 18x8.50-8 tube8K searches a year
02 · Price
A sale here is worth $20.68.
Listings sell for $20.68 on average, from $14.25 to $24.12. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 100 to 250 of them. At $20.68 that is $2K to $5K a year per listing.
- Average price
- $20.68inside the $15 to $100 sweet spot
- Price range
- $14.25–$24.12
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–2K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $2K–$5K
- Returns
- 2.3%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
93% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 10.1% of listings are out of stock. The average listing ranks #177 within Parts. It carries 1,806 reviews at 4.42 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 93%
- Prime listings
- 100%
- Out of stock, average day
- 10.1%
- Average rank
- #177in Parts
- Average rating
- 4.42 starsAmazon United States average 4.42 stars
- Average reviews
- 1,806per listing
- Listings tracked
- 14
04 · Newcomers
0 of last year's 5 launches cleared the first-year sales bar.
5 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 50 months on average, so the names here are settling in.
- Launched, last 12 months
- 5
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 50 months
Products
Top 18x8.50-8 Tube products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
18x8.50/9.50-8 Replacement Inner Tube with TR-13 Valve Stem (2-Pack) - For Golf Cart/Tractor/Lawn Mower and More
- Price
- $24.12
- Rating
- 4.3/5
- Reviews
- 20,285
- Age
- 6y ago

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)
- Price
- $22.99
- Rating
- 4.6/5
- Reviews
- 230
- Age
- 3y ago

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
- Price
- $23.32
- Rating
- 4.5/5
- Reviews
- 605
- Age
- 5y ago

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
- Price
- $22.19
- Rating
- 4.4/5
- Reviews
- 1,260
- Age
- 2y ago

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
- Price
- $22.47
- Rating
- 4.4/5
- Reviews
- 1,174
- Age
- 1y ago
Trending
estimated 90-day click momentum
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
- Price
- $22.47
- Rating
- 4.7/5
- Reviews
- 47
- Age
- 11mo ago

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
- Price
- $19.20
- Rating
- 4.1/5
- Reviews
- 18
- Age
- 8mo ago

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
- Price
- $20.79
- Rating
- 4.4/5
- Reviews
- 486
- Age
- 10mo ago

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
- Price
- $14.25
- Rating
- 4.4/5
- Reviews
- 30
- Age
- 1y ago

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)
- Price
- $22.99
- Rating
- 4.6/5
- Reviews
- 230
- Age
- 3y ago
Newest
by launch date
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)
- Price
- $18.36
- Rating
- 4.4/5
- Reviews
- 29
- Age
- 7mo ago

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
- Price
- $19.20
- Rating
- 4.1/5
- Reviews
- 18
- Age
- 8mo ago

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
- Price
- $20.79
- Rating
- 4.4/5
- Reviews
- 486
- Age
- 10mo ago

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
- Price
- $22.47
- Rating
- 4.7/5
- Reviews
- 47
- Age
- 11mo ago

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)
- Price
- $18.94
- Rating
- 4.4/5
- Reviews
- 155
- Age
- 12mo ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 64% of clicks. Leaders hold, but buyers still shop past them.
Brands
13 rising
Sellers
15
Est. top-5 brand share
72%
Top 20: 100%
Est. top-5 click share
64%
Top 20: 100%
Open market
22%
- AR-PRO33%
- CALU LUKY15%
- FVRITO8%
- SPORTYOUTH8%
- GICOOL8%
- weyleity7%
Demand
18x8.50-8 Tube search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Apr, May, Jun, Jul, Aug · busiest ÷ quietest = 4.8×
Reviews and returns
What reviews say buyers love and hate about 18x8.50-8 Tube
We read the reviews and the return reasons for every product selling here.
“Tubes are pure garbage”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
15 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 18x8.50-8 Tube questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









