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GasXcel 21" Self-Propelled Lawn Mower Gas, 170CC vs RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah

Updated July 2026 — GasXcel 21" Self-Propelled Lawn Mower Gas, 170CC wins on cutting width and bag capacity, RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah wins on weight and storage space.

The GasXcel mower is ideal for larger lawns with its powerful engine and versatile features, while the RB mower is a budget-friendly option for small spaces.

Why GasXcel 21" Self-Propelled Lawn Mower Gas, 170CC is better

Power

GasXcel has a 170cc engine compared to RB's battery.

Cutting Width

GasXcel has a 21-inch cutting width versus RB's 9 inches.

Grass Bag

GasXcel includes a large 65L grass bag, while RB does not.

Why RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah is better

Price

RB is significantly cheaper at $169.99.

Weight

RB is ultra-light at 11.5 lbs, making it easier to maneuver.

Storage

RB offers space-saving upright storage.

Overall score

GasXcel 21" Self-Propelled Lawn Mower Gas, 170CC
85
RB 9" Small Lawn Mower for Small Spaces, 40V 2Ah
70

Specifications

SpecGasXcel 21" Self-Propelled Lawn Mower Gas, 170CCRB 9" Small Lawn Mower for Small Spaces, 40V 2Ah
Engine Type170cc Gas40V Battery
Cutting Heights7 Positions3 Positions
Drive TypeSelf-PropelledManual
Mowing System4-in-1Mulching Only
Safety FeaturesStandardAdvanced

Dimension comparison

GasXcel 21" Self-Propelled Lawn Mower Gas, 170CCRB 9" Small Lawn Mower for Small Spaces, 40V 2Ah

Price Comparison

The GasXcel 21" Self-Propelled Lawn Mower is priced at $389.99, while the RB 9" Small Lawn Mower for Small Spaces is significantly cheaper at $169.99. This makes the RB mower about 56% less expensive than the GasXcel model. If budget is a primary concern, the RB mower is the clear winner, offering a more accessible option for homeowners with smaller lawns or limited resources. However, the price difference reflects the capabilities and features of each mower, which will be explored further in this comparison.

Engine Power and Performance

The GasXcel mower features a powerful 170cc OHV engine, designed to deliver smooth and reliable power for larger lawns. In contrast, the RB mower operates on a 40V 2Ah battery and is intended for small lawns up to 540 sq. ft. This battery-powered model has a brushless motor that operates at 6000 RPM, providing efficient cutting for its size. While the GasXcel is suited for extensive mowing tasks, the RB offers ease of use and maintenance-free operation, making it ideal for beginners or those with minimal mowing needs.

Mowing Capability

The GasXcel mower boasts a 4-in-1 cutting system that includes mulching, rear bagging, side discharge, and rear discharge, allowing for versatile lawn care. Its 21-inch cutting width permits a broader cutting area, making it suitable for larger residential yards. On the other hand, the RB mower features a more compact 9-inch cutting width, which limits its use to smaller spaces. It offers three adjustable cutting heights from 1.2" to 2", providing some flexibility but not to the same extent as the GasXcel's seven height adjustments ranging from 1" to 3".

Ease of Use

The RB mower is designed with user-friendliness in mind, weighing only 11.5 lbs without the battery. Its ultra-lightweight nature and one-hand steering capability make it highly maneuverable, especially in tight corners and smaller yards. The GasXcel mower, while self-propelled and easier to handle on slopes, is heavier and requires more effort to maneuver. Both models offer quick assembly, but the RB mower's compact design and upright storage save up to 70% more space, making it more convenient for those with limited storage options.

Grass Collection and Bag Capacity

The GasXcel mower is equipped with a large 65L (17.5-gallon) grass bag, minimizing the frequency of stops for bag emptying. This feature enhances productivity, especially when mowing larger lawns. In contrast, the RB mower's smaller size means it does not have a grass bag, relying instead on its mulching capabilities for grass disposal. While this may be suitable for small areas, it could be a disadvantage for users who prefer to collect clippings for composting or disposal.

Safety Features

The RB mower includes advanced safety designs, automatically stopping if tilted beyond 20°–70°, adhering to US safety standards. This is particularly beneficial for beginners or those unfamiliar with lawn care equipment. The GasXcel mower does not specify unique safety features in the provided data, though its robust construction and self-propelled mechanism generally contribute to user safety. Therefore, while both mowers are safe to use, the RB mower has a clear advantage in terms of built-in safety mechanisms.

Brand Reputation and Sales Rank

The GasXcel mower currently holds a sales rank of 31,962, while the RB mower ranks higher at 20,912. This suggests that the RB mower is more popular among consumers, potentially indicating higher customer satisfaction or better market positioning for smaller lawn care solutions. Brand reputation can influence purchasing decisions, and the RB mower's higher sales rank may give buyers more confidence in its performance and reliability.

Which should you buy?

Choosing between the GasXcel 21" Self-Propelled Lawn Mower and the RB 9" Small Lawn Mower ultimately depends on your specific needs. If you have a larger lawn and require a powerful, versatile mower, the GasXcel is worth the investment at $389.99. However, for those with smaller spaces or limited budgets, the RB mower at $169.99 offers excellent value with its lightweight design and ease of use. Ultimately, your decision should align with your lawn care needs and budget considerations.