Bob Reeves 43XS (ES)
TrumpetIn Production
Precision Specifications
RIM DIAMETER17.07 mm
CUP DEPTHExtra Shallow
THROAT ∅3.57 mm
BACKBORE#2
SHANKstandard
CUP SHAPEbowl
Rim Widthmedium-narrow
Rim Contoursemi-round
Throat Drill #—
Materialbrass
Finishsilver-plate
Weightstandard
Recommended For
Lead
About This Mouthpiece
The Bob Reeves 43XS (ES) is a extra-shallow-cup Bb trumpet mouthpiece featuring a 17.07mm rim diameter and 3.57mm throat. It has a #2 backbore, standard shank. Well-suited for lead playing.
Brand Deep Dive
Bob Reeves · BrassFit Science
Bob Reeves Guide
Screw-rim system, Reeves Sleeves gap adapter, and cup numbering decoded.
Source Posture
BrassFit treats Bob Reeves pages as neutral reference pages. Exact dimensions above are the structured listing data for this model. If you spot a spec mismatch, missing variant, or outdated source page, send a correction before outreach so the cluster stays manufacturer-safe.
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