Ryobi’s newest 40V outdoor tool is now on shelves at Home Depot, arriving just as homeowners start thinking about spring yard work.
The RYOBI 40V 15″ Attachment-Capable String Trimmer (model RY40ST01K with battery and charger, or RY40ST01B bare tool) was announced as a Q1 2026 launch — and it’s available now. At $159 bare tool, it’s positioned as a direct gas replacement with battery convenience.
The Case for a 15-Inch Cordless Trimmer
Most homeowner-grade cordless trimmers run 13″ cutting widths. Ryobi’s new 15″ model closes the gap to the 16″–17″ cutting paths common on commercial gas trimmers, meaning fewer passes per yard and less time trimming. Ryobi says it delivers more power than a 25cc gas string trimmer and runs 89% quieter — two claims worth checking against your local dealer demo if you’re on the fence.
The EXPAND-IT Compatibility Is the Real Story
This trimmer accepts RYOBI EXPAND-IT attachments, meaning the same powerhead can run a pole saw, edger, blower, or cultivator attachment. If you’re paying $159 for a trimmer, being able to add a $50–$80 attachment instead of buying a second dedicated tool changes the math considerably.
EXPAND-IT also accepts many universal gas-attachment brands, so if you already own compatible attachments from other manufacturers, they’ll likely work here too.
What’s in the Box
- RY40ST01K kit: trimmer + 4.0Ah 40V battery + charger
- RY40ST01B: bare tool only (battery sold separately)
- 15″ cutting width, auto-feed bump head
- Compatible with all RYOBI 40V batteries
Where to Buy
Ryobi is sold exclusively through Home Depot. The RY40ST01K kit is available now at Home Depot. Pricing is around $159 for the bare tool at time of writing — check current pricing before you buy.
With the official spring tool savings events now in full swing at Home Depot, this is also a good time to look for bundle deals — Ryobi Days promotions have historically included free battery or tool offers with qualifying purchase thresholds.
The Bottom Line
For a Ryobi 40V user who wants to consolidate gas attachments onto a battery platform, the 15″ EXPAND-IT trimmer is a sensible pick. The cutting width bump over standard 13″ models is real, and attachment compatibility gives it long-term value beyond trimming alone.
For the full cordless trimmer picture, see our Best Cordless String Trimmers 2026 guide. If you’re also thinking about battery-powered hedging, our Best Cordless Hedge Trimmers 2026 covers top picks there. And if you’re evaluating whether 40V is the right Ryobi platform for your yard setup, our Battery Platforms Compared 2026 walks through where each platform makes sense.
Sources: Home Depot listing | HowToGeek Ryobi 2026 roundup
