Alpine Chain Co. LT43-S chainsaw chain.

Equivalent chain size

3/8" LP PITCH | 0.043" GAUGE

• Oregon 90PX / R33
• Stihl 61PMM3
• Husqvarna H38

Exact Fitment Specifications

To ensure compatibility with your Ryobi R18PPSA20, verify your current guide bar matches these exact metrics:

CHECK YOUR BAR STAMPS, and send us a photo of your bar stamp in the chat bubble for a Guaranteed Fit!

Fits Saw Model: Ryobi | R18PPSA20 ONE+ Oil-Free Pole Pruner Attachment (18V)

Bar Length: 8" / 203mm (33DL)

Chain Pitch: 3/8" LP

Chain Gauge: 0.043"

Cutter Profile: Semi-chisel

Sharpening File Size: 4.0mm round

Performance

• Durability: The semi-chisel tooth geometry is designed to withstand dry and dirty Australian hardwoods for sustained cutting.

• Specific use: For overhead pruning, limbing and branch work on Australian native hardwoods and soft timbers.

• Oil-Free Compatible: The R18PPSA20 runs without a bar oiler, so chain quality matters more than usual — our hardened semi-chisel profile is built to hold an edge under higher friction.

Need It Fast?

Orders over $100 ship free by express; over $50 free standard. Orders are dispatched within 24 hours of processing.

Ryobi R18PPSA20 Chain Questions

What size chain does a Ryobi R18PPSA20 take?

3/8" LP pitch, .043" (1.1mm) gauge, 33 drive links on the 8" (203mm) bar.

Does the oil-free design need a special chain?

No — it uses the standard 8" Ryobi specification. But because there's no bar oiler, running a chain that holds its edge matters more; a dull chain generates far more heat without lubrication.

What file do I use on this chain?

A 4.0mm (5/32") round file suits this 3/8" LP chain.

Is this a genuine Ryobi chain?

No — it's an Alpine Chain Co. chain manufactured to the same specification, matching the Oregon 90PX / R33. Same pitch, gauge and drive link count, with a semi-chisel profile chosen for Australian hardwood. Every fit is backed by our Guaranteed Fit system.

How to Verify Your Chain Size

If you are unsure if this is the correct chain for your Ryobi R18PPSA20, check the side of your current guide bar. The Pitch, Gauge, and Drive Link (DL) count are typically stamped directly into the bar near the mounting bolts.

Require technical verification? Chat with our specialist team using the chat bubble on screen, or ask our community on the Alpine Chain Co. Forum.