RPM80842 Rear suspension arms
RPM Rear A-Arms
Compatible with: ARRMA Big Rock 3S V3 (ARA4312V3)
What it replaces
OEM part ARA330540 · Durability upgrade
Why it fits
RPM replaces ARA330540 and cautions Big Rock owners to verify the installed arm. Source also lists: Typhon 3S.
Confidence: High
Source explicitly names this model or the replaced part.
Important fitment notes
Older Big Rock variants may use Granite arms. Supporting parts: Verify installed OEM arm number.
Vehicle scope in source
ARRMA Big Rock 4X4 V3 3S BLX (ARA4312V3) only. V3 evidence; not V4/223S.
Only models named here by the source are covered. We don't extend fitment to other models or revisions.
Where to buy
Last seen: $12.49
Price and availability may have changed.
Verification source
gshobby.comLast verified Sep 28, 2026 · Seed verified
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