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2.80-4 Innertube. This tube is marked 2.8-4 and is the most popular size used on stand-up gas scooters with 4 inch rims.
- 2.80-4 innertube
- Fits 9x3.5-4 tire but can work with many other tires with 4 inch rims.
- Has a bent angle valve stem
Various unlisted makes/models
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