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At A Glance
- Neck Type
- Wizard III / Maple neck
- Top/Back/Body
- Poplar Burl top / Meranti body
- Fretboard
- Jatoba fretboard / White dot inlay
- Fret
- Jumbo frets
- Number of Frets
- 24
- Bridge
- F106 bridge
- String Space
- 10.5mm
- Neck Pickup
- Quantum (H) neck pickup (Passive/Ceramic)
- Bridge Pickup
- Quantum (H) bridge pickup (Passive/Ceramic)
- Factory Tuning
- 1E,2B,3G,4D,5A,6E
- Strings
- D'Addario EXL110
- String Gauge
- .010/.013/.017/.026/.036/.046
- Hardware Color
- Cosmo black
- Scale
- 648mm/25.5"
- A : Width
- 43mm at NUT
- B : Width
- 58mm at 24F
- C : Thickness
- 19mm at 1F
- D : Thickness
- 21mm at 12F
- Radius
- 400mmR
- Finish
- Sapphire Blue Flat
Ibanez built the RG421PBSBF as part of the RG Series, positioning it as a fixed-bridge, high-output solid-body electric guitar. The model carried a Poplar Burl top over a Meranti body, paired with a Wizard III Maple neck — a profile Ibanez developed for fast, low-action playing. The Jatoba fretboard featured white dot inlays and 24 jumbo frets across a 648 mm (25.5") scale length.
Hardware was finished in Cosmo black throughout. The F106 fixed bridge offered a 10.5 mm string spacing, and the guitar was strung from the factory in standard E tuning with D'Addario EXL110s (.010–.046). Pickup duties fell to a pair of passive, ceramic-magnet Quantum humbuckers — one at the neck, one at the bridge. Neck dimensions measured 43 mm at the nut, widening to 58 mm at the 24th fret, with a thickness of 19 mm at the first fret and 21 mm at the twelfth; the fretboard radius was 400 mm. The finish on this variant was Sapphire Blue Flat.
Owners requiring setup work, fret service, or sourcing of compatible replacement parts such as a standard F106-pattern fixed bridge or Cosmo black hardware should consult a qualified guitar technician or luthier familiar with Ibanez RG-series instruments.
STRAIGHT TALK
What Stands Out
Keep In Mind
From the people who own them
Nothing in The Vault is for sale. These records exist so the instruments stay documented after the manufacturer moves on — and the most useful part of that record is what owners add to it.
Owner photos
Put yours on the record.
The catalog shot showed one finish, under one light, a long time ago. Yours has been played. Photos from owners are what the next person finds when they are trying to identify a part, match a finish, or work out whether the one they just bought is really what the seller said it was.
What do you know about this one?
Specs only go so far. What actually fits, what breaks first, what the factory got right and what everyone ends up changing — that lives with the people who own them, not in a datasheet. Post what you know and it stays on this page for whoever comes looking next.
Build Your Complete System
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Gear Help, Handled
From spec questions to full builds — players who have lived this gear since 2007.
Since 2007
Fit & Compatibility
- Bridge, tuner, and nut fit confirmed for your guitar
- Pickup and electronics compatibility checks
- Pedal power and amp/cab impedance matching
Mods & Upgrades
- Upgrade paths for the guitars you already own
- Wiring, routing, and hardware swap guidance
- Advice from people who actually do the mods
The Vault
- Discontinued and EOL guitars kept on record
- Specs, history, and known part compatibility
- Share your builds and mods with the community
