The Ryobi RY40HPST01B is the tool-only version of the 40V HP brushless 16 in. string trimmer, built for users who want a step up in power and cut width over the 18V ONE+ platform. The 40V HP brushless motor delivers sustained high-torque output suited to thick overgrowth, tall grass, and demanding edging work, while the carbon fiber shaft keeps overall weight manageable at a higher voltage tier. The REEL EASY+ 3-in-1 bump feed head supports bump-feed, fixed-line, and bladed operation, and the trimmer is EXPAND-IT attachment capable for conversion to an edger, blower, cultivator, or other EXPAND-IT implements. This bare-tool listing is intended for owners who already have one or more 40V HP batteries in their outdoor tool lineup.
What battery does the RY40HPST01B require?
The RY40HPST01B requires a Ryobi 40V HP battery, which is not included with the tool-only model. It is compatible with all 40V HP batteries in the Ryobi lineup. For best performance on heavy trimming tasks, Ryobi recommends a 4.0 Ah or larger 40V HP pack.
Why does the RY40HPST01B use a carbon fiber shaft?
The carbon fiber shaft on the RY40HPST01B provides a high strength-to-weight ratio compared to traditional aluminum or fiberglass shafts. This keeps the overall tool weight lower while maintaining the rigidity needed for EXPAND-IT attachment use and extended trimming sessions.
Is the RY40HPST01B compatible with EXPAND-IT attachments?
Yes. The RY40HPST01B is EXPAND-IT attachment capable. You can remove the trimmer head and connect compatible EXPAND-IT implements such as the edger, blower, cultivator, or pole saw attachment — all sold separately — transforming the trimmer into a multi-function outdoor power tool.
What is the difference between the RY40HPST01B and the RY40HPST02B?
The RY40HPST01B has a 16 in. cut width, while the RY40HPST02B is the larger model with a 17 in. cut width and a rated weight of 9.25 lbs. The RY40HPST02B is positioned as a heavier-duty equivalent to a 32cc gas trimmer, making the RY40HPST01B the better choice for typical residential use and the RY40HPST02B better suited for larger or more demanding properties.
What line diameter does the RY40HPST01B use?
The RY40HPST01B uses 0.095 in. diameter trimmer line — a heavier gauge than the 0.080 in. line used on the 18V ONE+ trimmers, reflecting the higher power output of the 40V HP platform. Pre-wound REEL EASY+ replacement spools in 0.095 in. are the easiest way to reload the head.
# Ryobi 40V HP Brushless 16 in. String Trimmer (Tool Only) **Model:** `RY40HPST01B` **Brand:** Ryobi **Category:** String Trimmer > The Ryobi RY40HPST01B is the tool-only version of the 40V HP brushless 16 in. string trimmer, built for users who want a step up in power and cut width over the 18V ONE+ platform. The 40V HP brushless motor delivers sustained high-torque output suited to thick overgrowth, tall grass, and demanding edging work, while the carbon fiber shaft keeps overall weight manageable at a higher voltage tier. The REEL EASY+ 3-in-1 bump feed head supports bump-feed, fixed-line, and bladed operation, and the trimmer is EXPAND-IT attachment capable for conversion to an edger, blower, cultivator, or other EXPAND-IT implements. This bare-tool listing is intended for owners who already have one or more 40V HP batteries in their outdoor tool lineup. ## Specifications | Attribute | Value | |---|---| | Product Type | String Trimmer | | Voltage (V) | 40 | | Platform | 40V HP | | Cordless / Corded | Cordless | | Motor Type | Brushless | | Cut Width In | 16 | | Line Diameter In | 0.095 | | Feed Type | Bump Feed (REEL EASY+ 3-in-1) | | Attachment Capable | Yes | | Shaft Material | Carbon Fiber | | Tool Only | Yes | | Batteries Included | 0 | | Battery Included | No | | Charger Included | No | | Warranty | 5-year limited | ## What's Included - (1) RYOBI 40V HP Brushless 16 in. String Trimmer (RY40HPST01B) - (1) REEL EASY+ 3-in-1 Bump Feed Head Source: https://www.jaspecs.com/ryobi/string-trimmer/ry40hpst01b-ryobi-40v-hp-brushless-16-in-string-trimmer-tool-only/