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At A Glance
- Neck Type
- GSRM4 / Maple neck
- Top/Back/Body
- Poplar body
- Fretboard
- Jatoba / White dot inlay
- Fret
- Medium frets
- Bridge
- B10 bridge
- String Space
- 19mm
- Neck Pickup
- Dynamix P neck pickup (Passive)
- Bridge Pickup
- Dynamix J bridge pickup (Passive)
- Hardware Color
- Black
- Scale
- 726mm/28.6"
- A : Width
- 38mm at NUT
- B : Width
- 58.5mm at 22F
- C : Thickness
- 21mm at 1F
- D : Thickness
- 22mm at 12F
- Radius
- 305mmR
- Finish
- Walnut Flat
Ibanez built the GSRM20BWNF as part of the miKro Series electric bass line, a range designed around a reduced scale length of 726mm (28.6"). The instrument carried a Poplar body paired with a Maple neck and Jatoba fretboard with white dot inlays, and was finished in Walnut Flat.
The GSRM20BWNF featured medium frets on the Jatoba board, with a nut width of 38mm and a string spacing of 19mm at the B10 bridge. The neck profile measured 21mm thick at the first fret and 22mm at the twelfth, tapering to 58.5mm width at the 22nd fret, with a 305mm radius fretboard. Pickups consisted of a passive Dynamix P at the neck position and a passive Dynamix J at the bridge, with all hardware finished in black.
Owners sourcing replacement parts should note the B10 bridge configuration and the 19mm string spacing when identifying compatible saddles or bridge assemblies. For setup work, intonation adjustments, or fret maintenance, a qualified guitar technician or luthier familiar with short-scale bass instruments will be best placed to advise on this instrument's specific geometry.
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.
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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
