GR 65M

TrumpetIn Production

Precision Specifications

RIM DIAMETER16.5 mm

CUP DEPTHMedium

THROAT ∅3.66 mm

BACKBOREmedium

SHANKstandard

CUP SHAPEbowl

Rim Widthmedium

Rim Contourgr

Throat Drill #—

Materialbrass

Finishsilver-plate

Weightstandard

Recommended For

All Around

About This Mouthpiece

The GR Technologies 65M is a medium-cup Bb trumpet mouthpiece featuring a 16.5mm rim diameter and 3.66mm throat. It has a medium backbore, standard shank. Well-suited for all-around playing.

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The 2 Cents Forum

Share how this mouthpiece feels, responds, and works in different registers.

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Community Sentiment

Based on 1 rating

4.0Resistance

8.0Rim Comfort

3.0Rim Bite

5.0Brightness

5.0Tone Focus

7.0Articulation

7.0Flexibility

8.0Endurance

Rate This Piece

Your Name

Material You Played

Rate This Piece — 8 Dimensions

Physical Feel

Resistance— Back-pressure & support

1 — Free-blowingRestrictive — 10

Rim Comfort— How kind is it on your chops?

1 — UncomfortableVery comfortable — 10

Rim Bite— Sharpness of the rim edge

1 — Very round / forgivingVery sharp / precise — 10

Tonal Character

Brightness— Overall spectral colour

1 — Dark & warmBright & piercing — 10

Tone Focus— Core vs. spread sound

1 — Spread / diffuseCentred / laser — 10

Playability

Articulation— Clarity & crispness of attack

1 — Blurry / sluggishCrisp & immediate — 10

Flexibility— Ease of slurs & pitch bending

1 — Rigid / stiffFluid & flexible — 10

Stamina

Endurance— How long before fatigue sets in?

1 — Tires quicklyPlays all night — 10

Your Review0/5,000

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The 2 Cents Forum1 review

Iron DollSilverApr 5, 2026

True to it’s identity - an all around mouthpiece! I find the rim comfort & rim bite perfect for my chops. I’m constantly playing different styles of music and I’ve yet to feel disappointed with my sound output with the 65M, and that’s after 20 years of using the same mouthpiece. Thank you GR!!