We researched and compared the top auto feed string trimmers designed for trimming around wheel rims. Our evaluation is based on manufacturer specifications, industry safety standards, and aggregated owner feedback. We focused on bump-feed and automatic line advancement systems, cutting width, line thickness, and overall reliability. Below are our findings, including critical weaknesses and who should skip each model.
| Photo | Product | Score | Buy |
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DEWALT DCST970X1 60V MAX String Trimmer Best Overall 60V battery, 0.080-inch line, 15-inch cutting width |
9.0 | 🛒 Check Price |
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EGO Power+ ST1521S 15-Inch String Trimmer Runner Up 56V battery, 0.095-inch line, 15-inch cutting width |
8.7 | 🛒 Check Price |
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BLACK+DECKER LSTE525 40V MAX String Trimmer Best Value 40V battery, 0.065-inch line, 13-inch cutting width |
8.4 | 🛒 Check Price |
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WORX WG163 GT 2.0 20V String Trimmer Lightweight Champion 20V battery, 0.065-inch line, 12-inch cutting width |
8.1 | 🛒 Check Price |
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Makita XRU15PT1 36V (18V X2) Brushless String Trimmer Professional Grade 36V (two 18V batteries), 0.080-inch line, 15-inch cutting width |
8.8 | 🛒 Check Price |
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Greenworks 21362 40V 16-Inch String Trimmer Wide Cut 40V battery, 0.080-inch line, 16-inch cutting width |
7.8 | 🛒 Check Price |
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Ryobi RY40440 40V HP Brushless String Trimmer Budget Friendly 40V battery, 0.080-inch line, 15-inch cutting width |
7.3 | 🛒 Check Price |
1. DEWALT DCST970X1 60V MAX String Trimmer: Best Overall
The DEWALT DCST970X1 is a powerful 60V string trimmer that excels in cutting thick grass and weeds around wheel rims. Its bump-feed head reliably advances line with a simple tap, and the variable speed trigger allows precise control. Owner feedback highlights strong performance and durability, though the battery and charger are not included, increasing upfront investment.
However, the trimmer is heavier than some cordless models, which may fatigue users during extended use. Skip this if you prefer a lightweight trimmer for small yards or have limited budget for batteries. It is best for those with larger properties who need sustained power.
- Brushless motor delivers high torque and runtime
- Bump-feed head with automatic line advancement
- Variable speed trigger for precise control
Pros: Excellent power for heavy weeds; Long battery life with 60V system
Cons: Battery and charger sold separately
2. EGO Power+ ST1521S 15-Inch String Trimmer: Runner Up
The EGO Power+ ST1521S is a lightweight, weather-resistant trimmer ideal for trimming around wheel rims without strain. Its bump head reloads quickly, and the telescoping shaft accommodates different users. Owner feedback praises its ease of use and battery life, though some report occasional line feeding hiccups in dense vegetation.
We noted that the line may not advance automatically if the head is not tapped firmly. Skip this trimmer if you need a heavy-duty machine for commercial use or very thick brush. It is a solid choice for homeowners with medium-sized lawns.
- Weather-resistant construction with IPX4 rating
- Rapid reload bump head for easy line changes
- Adjustable telescoping shaft for user height
Pros: Lightweight and well-balanced; Quick-charge battery option available
Cons: Line advance can be inconsistent on thick weeds
3. BLACK+DECKER LSTE525 40V MAX String Trimmer: Best Value
The BLACK+DECKER LSTE525 offers excellent value with its automatic feed system that requires no bumping, making it easy to use around wheel rims. The power drive transmission helps maintain torque, and the edger mode adds versatility. Owner feedback highlights the low price and convenience, but the thin line is prone to snapping on thicker growth.
We found that the automatic feed can sometimes jam if the line is not spooled evenly. Skip this if you have heavy weeds or large areas to trim. It is best for light maintenance and small yards.
- Automatic feed spool eliminates bumping
- Power drive transmission increases torque
- Edge switch converts to edger mode
Pros: Very affordable for the performance; Automatic feed is convenient
Cons: Line is thin and breaks easily on tough weeds
4. WORX WG163 GT 2.0 20V String Trimmer: Lightweight Champion
The WORX WG163 GT 2.0 is one of the lightest auto feed trimmers, perfect for trimming around wheel rims with minimal fatigue. Its command feed system advances line automatically without bumping. Owner feedback appreciates its ease of use and compact size, but it struggles with dense or tall weeds.
We observed that the battery life is limited, and the thin line can wear quickly on rough surfaces. Skip this if you need a trimmer for heavy-duty tasks or large properties. It is ideal for small gardens and light touch-ups.
- Command feed technology automatically advances line
- Adjustable auxiliary handle for comfort
- Compact design for tight spaces
Pros: Extremely lightweight at under 5 pounds; Easy to maneuver around obstacles
Cons: Underpowered for thick weeds
5. Makita XRU15PT1 36V (18V X2) Brushless String Trimmer: Professional Grade
The Makita XRU15PT1 is a professional-grade trimmer with a brushless motor and dual battery system that delivers consistent power for trimming around wheel rims. Its bump-feed head works reliably, and the variable speed allows fine control. Owner feedback praises its durability and performance, but it is one of the heaviest models.
We noted that the price is high, and the weight may be an issue for some users. Skip this if you want a lightweight trimmer or have a limited budget. It is best for professionals or homeowners with large, demanding yards.
- Dual battery system for extended runtime
- Brushless motor with variable speed
- Rapid charger included
Pros: Exceptional build quality and power; Long runtime with two batteries
Cons: Heavy and expensive
6. Greenworks 21362 40V 16-Inch String Trimmer: Wide Cut
The Greenworks 21362 offers a wide 16-inch cutting width, reducing time trimming around wheel rims. Its bump-feed head works adequately, and the telescoping shaft fits different users. Owner feedback notes that the trimmer is decent for the price but lacks power for thick weeds.
We found that the battery drains faster when using the full cutting width. Skip this if you need a trimmer for heavy-duty work or prefer a longer runtime. It is suitable for medium-sized yards with regular grass.
- Wide 16-inch cutting path for efficiency
- Bump-feed head with automatic line advance
- Adjustable telescoping shaft
Pros: Covers more ground per pass; Good value for the price
Cons: Battery life is average
7. Ryobi RY40440 40V HP Brushless String Trimmer: Budget Friendly
The Ryobi RY40440 is an affordable brushless trimmer that performs well for light trimming around wheel rims. Its bump-feed head is simple to use, and the brushless motor improves efficiency. Owner feedback indicates that it is a good value but some parts feel flimsy.
We observed that the line advance can be inconsistent, and the trimmer may struggle with thick weeds. Skip this if you need a robust machine for frequent heavy use. It is best for budget-conscious users with small lawns.
- Brushless motor for efficiency
- Bump-feed head with easy reload
- Compatible with Ryobi 40V system
Pros: Low price point; Good for light to medium trimming
Cons: Plastic components feel less durable
Frequently Asked Questions
What is an auto feed string trimmer?
An auto feed string trimmer automatically advances the cutting line without manually bumping the head. Some models use a bump-feed mechanism (tap the head on the ground) while others have a fully automatic system that senses line wear. This feature is convenient for trimming around wheel rims because it reduces interruptions.
What line thickness is best for trimming around wheel rims?
For trimming around wheel rims, a line thickness of 0.065 to 0.080 inches is generally recommended. Thinner lines are more flexible and less likely to damage rims, but they break more easily on tough weeds. Thicker lines (0.095 inches) are more durable but can scuff rims if used carelessly. We suggest matching the line to the trimmer’s specifications and your vegetation type.
Can I use a battery-powered auto feed trimmer for heavy weeds?
Battery-powered auto feed trimmers vary in power. Models with higher voltage (60V, 36V) and brushless motors can handle heavy weeds, but they may drain batteries quickly. For heavy weeds around wheel rims, we recommend a trimmer with at least 40V and a brushless motor. However, for very thick brush, a gas-powered trimmer might be more effective.
How do I maintain an auto feed string trimmer?
Regular maintenance includes cleaning the cutting head after each use to remove debris, checking the line for wear, and lubricating the bump-feed mechanism if recommended. For battery models, store batteries indoors and avoid extreme temperatures. Always follow the manufacturer’s maintenance schedule to extend the trimmer’s life.
Is it safe to trim around wheel rims with a string trimmer?
Yes, but caution is needed. Use a trimmer with a guard to deflect debris away from the rim. Keep the line speed moderate and avoid holding the trimmer at an angle that could cause the line to strike the rim directly. We recommend wearing safety glasses and long pants to protect against flying debris.
Our Verdict
After researching and comparing, our top pick is the DEWALT DCST970X1 for its powerful 60V system, reliable bump-feed, and overall durability. The runner up is the EGO Power+ ST1521S, offering a lighter weight and excellent ease of use for homeowners. Both are well-suited for trimming around wheel rims, but your choice should depend on your power needs and budget.
Last reviewed and spec-checked: June 24, 2026. We re-check our picks and listings periodically.
