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GR Trumpet Mouthpiece


Item Details

 I don't currently represent GR mouthpieces, but I have a few in stock.

For Bb trumpet:

  • e62M - wide rim, less bite, 0.62" diameter, medium cup
  • 3HC** - flatter rim, soft bite, C cup, open throat


For piccolo trumpet, varying diameters, cornet shank:

  • 62P 0.62"
  • 63P 0.63"
  • 65P 0.65"
  • 66P 0.66"




Standard GR Rim
  • The Standard GR Rim is composed of medium characteristics.  
  • This rim is comfortable and is generally easy for most players to adapt to quickly. 
  • The width may feel a bit more generous than traditional rims and will aid endurance.  
  •  Flexibility is good and articulations will be cleanly defined. 
  • This is our most popular rim choice and ""blind"" tests have proven that it is favoured over many conventional rims. 
  • Standard Rims have no designation on the mouthpiece itself.
e Rim
  • The GR e - Rim is made for those that require a wider feel and less bite. 
  •  This rim is ideal for players that require good endurance; furthermore, it is great for downsizing giving the player the same OD yet smaller ID.  
  • The bite is medium soft and contour is semi-flat. 
  • E Rims have an ""e"" designation on the mouthpiece.  
  • This rim is standard on the e62 and e65 Series Mouthpieces and is available on other models as a special order.  
  • Note * If a rim is too flat or too wide it will impinge lip vibration and cause a thin sound on certain players.  On the other hand many players can benefit from added support with this type of rim.
G Rim
  • The GR G Rim was originally designed by Gary Radtke for his own use but with it's popularity, we decided to add it to our line.  
  • The G Rim has the same bite contour as our Standard rim but the rim is slightly wider and outside radius is slightly larger.
  • This gives the player more effective rim area on the chops as mouthpiece pressure is applied.  
  • It aids in the distribution of pressure over a larger lip surface which will give support and aid endurance.  
  • This rim does not feel overly wide and flexibilities will not be compromised.  
  • The G Rim will have a ""G"" designation on the mouthpiece.  
  • This rim is standard on the G66 Series Mouthpieces as well as some G67 models, and is available on other models as a special order.
3 Series Rim
  • The GR 3 Series Rim has a slightly flatter feel than the GR Standard rim.   
  • It may have a familiar feel to conventional 3 players but with GR improvements in comfort and articulations. 
  • All 3 Series Mouthpieces have the same alpha angle.   
  • The bite is softer than the Standard GR Rim and GR E-Rim.  
  • The larger bite radius may make the rim feel larger. 
  • The outside diameter is slightly narrower than the  Standard GR Rim.  
  • This is a generous rim with excellent grip and support.
Z* Rim
  • This popular rim is flatter than the GR E-Rim and will feel more cushioned than the Standard GR Rim, yet with increased grip. 
  • The Z* rim offers secure comfort, endurance and distribution of pressure.   
  • The bite is medium and the alpha is high.  
  • This is a very popular choice for players using conventional ""4"" rims who need increased endurance with improved articulations.
Z** Rim
  • Same as the Z* Series rim with a softer bite.  
  • This allows for slightly more chop in the cup and is an excellent choice for commercial players who are accustomed to a softer bite. 
  • The Z** rim offers secure comfort, endurance and an even distribution of pressure.
  • This is an ideal rim for players used to the Schilke 4 rim feel.
64.7 Series Rim
  • This rim is slightly wider than the GR Standard Rim and features a comfortable semi - flat contour. 
  • It has a slightly more cushioned feel than the Standard GR rim but with a bite that allows for precise articulations. 
  • This rim is an excellent alternative to 13A4a players who need a more secure grip with cleaner attacks.
  • Standard on the 64.7 Series.
65.6 Series Rims
Paul Butcher 65.6 Rim
  • Similar to the GR Standard rim but with the highpoint slightly closer to the bite and a slightly sharper bite. 
  • This popular rim features a secure comfortable grip and crisp articulations.  
  • Ideal for players who like to feel the secure grip of the rim which aids their attacks, flexibilities, and endurance.
  • Standard on the B65.6S, 65.6MS, 65.6M, 65.6*M2+, 65.6C
M65.6 Rim
  • With a flatter contour than the GR Standard rim, this rim has a very comfortable feel. 
  • Coupled with the medium alpha angle and medium sharp bite this rim also allows for very quick attacks. 
  • The medium alpha also allows for more lip room.  
  • An ideal rim for the commercial player who wants more chop room cleaner attacks, and a fatter sound than most ""conventional commercial"" mouthpieces allow.
  • Standard on the 65.6S
66.5 Series Rims
  • This rim has a rounded contour and a softer bite than the Standard GR Rim. 
  • Using digital analysis this rim has some profile similarities to the 1 1/4C and Stork 2, with GR improvements. 
  • This rim is excellent for a player that doesn't get a vibrant sound on a flatter rim or with a sharp bite. 
  • The rounded contour and soft bite makes this rim feel larger with added support.  
  •  Flexibility is excellent, articulations snap.
Q Series Rims
  • The Q rim is slightly flat, outside diameter follows is tradition in width and contour, highpoint is further out than the standard GR Rim. 
  • The bite is medium sharp with the traditional feel and grip, and the alpha is medium for lip freedom, support, and articulation. 
  • The bite grip holds the lips from penetrating too far into the cup.
  • Standard on the 66Q Series Trumpet Mouthpieces.
Cornet Rims
  • GR Cornet Rims match those of the corresponding GR Trumpet Mouthpieces. 
  • When ordering, please specify the rim, cup diameter, and cornet cup.
Flugelhorn Rims
  • GR Flugelhorn Rims match those of the corresponding GR Trumpet Mouthpieces. 
  • When ordering, please specify the rim, cup diameter, and whether you require the FL or FD Model.
Piccolo Trumpet Rims
  • GR Piccolo Trumpet Mouthpiece Rims feature contours very similar to our Standard Rims.  
  • This rim is comfortable and is easy for most players to adapt to quickly. 
  • The width will feel generous and will aid endurance. 
  • The bite radius has been increased to give the feel of a larger mouthpiece while keeping the buzz ring smaller.   
  • They are slightly wider than our Standard Rims for support in high piccolo trumpet playing.  
  • Flexibility is good yet attacks will not suffer. 
  • The 64.4P and 66PM-T have a sharper bite than standard.



Z Cup

The Z Cup has a small cup volume that features a brilliant fat and powerful sound throughout the horn and an astonishingly easy upper register.  

  • While most ""conventional commercial"" cups tend to shut off vibrations and have a thin tone, the Z Cups have the chop room to allow for free lip vibrations which produce  clean articulations, and a full commanding sound from low F# to above Double C!
  • The Z Cup features a higher alpha angle than the S Cup and longer L1 to achieve optimum lip room for vibrating freedom, support for compression and crisp articulation.  
  • The Z* rim has a medium bite and the Z** rim has a softer bite, although, the cup parameters are basically the same.   
  • This is an excellent choice for commercial playing, big band, lead-work, marching band, drum corps, and recording.  
  • This mouthpiece will really Zing from top to bottom! (Get it?)

ES Cup

  • The ES cup has a higher alpha angle than our standard S cup.  
  • It has a smaller first cup radius and an increased beta angle to enhance articulation and sizzle in the extreme upper register.  
  • This cup has a very small volume and is shallower in depth to maximize compression.
  • The ES cup has a huge sound in the upper register like all other GR Mouthpieces.  
  • The throat and backbore were not compromised because the compression is achieved from the cup design. 
  • The ES cup is standard in the 64 and 65 diameters.
  • Standard GR Rim and #1 Backbore.

E-5 Cup

  • 64 E - 5 The rim has semi-flat characteristics and the highpoint is further from the bite than most mouthpieces in this diameter.  
  • The bite is medium sharp and the alpha angle is medium allowing for more lip freedom in the upper cup.  
  • This allows for improved articulations, flexibilities, range, and sound. 
  • This cup is shallow with a small cup volume and a unique throat entrance created by the GR Mouthpiece Design Program.  
  • The unique throat allows for good compression and articulation in the upper register as well as a big fat sound.  
  • This mouthpiece has the GR #1 backbore.   
  • The 64 E - 5 mouthpiece works well for upper register players that need more lip room.  
  • This rim has similarities to the Wick 5E and Schilke A4a rims.


Try this mouthpiece  if you are playing a GR 64Z* and you bottom out or feel like you shut off.  Also, if you play a Wick 5E and want improved articulation, sound, projection, and intonation with a similar feel, look at the 64E-5.  If you play a Schilke 10A4a and you bottom out or feel like you shut off, this piece may be an ideal alternative.

SZ Cup

  • The SZ Cups  feature the standard GR-Rim and alpha of the Standard GR Compu-Balanced S cup.  
  • The SZ cup basically has the rim and alpha of the S cup and the bottom of the Z with the GR #1 Backbore. 
  • The GR Mouthpiece Design Program makes a mathematically perfect design that features less volume than the S cup but more than the Z cup, this design allows for the lip room of the S cup with the edge and compression of the Z cup. 
  • The SZ has a powerful big sound and a full sound spectrum, good endurance and added compression for a strong upper register with superb articulation.  
  • The SZ cup is outstanding for lead work, marching band/drum corps, Latin, jazz, and studio work, great for microphone work and records well. 
  • Recommended for players who feel the Z cup impinges the lips, not enough lip room, has an alpha angle that it too high, or the rim is too flat, as well as, a great choice if the S cup doesn’t provide enough compression for range requirements and articulation or enough edge to the sound. 
  • SZ Cups are available in the 62, 63, 64, 65, 66, and 67 diameters as a standard order.  Other diameters and rims available as a special order.

S Cup

  • This versatile commercial  GR S cup can be used in varied musical situations.   
  • The sound is big and brilliant. Projection is excellent.  
  • The backbore is the GR #1 Backbore  with good core to the brilliant sound.  
  • The S Cup volume is  small, although, it has ample lip room for most players.  
  • This is an ideal solution to those who bottom out on ""conventional commercial"" cups.
  • The alpha angle is not too high and does not impinge the lips, furthermore, it has the ability to lightly grip and keeps the lips held into place for great endurance.  
  • This cup is great for lead, show work, studio work, and all-around playing.

MS Cup

  • The MS Cup has a slightly lower alpha angle, greater cup volume, a slight increase in cup depth, as well as, a larger backbore  than the S Cup.  
  • The MS has the GR #2 backbore as standard.  This is a great all around cup with a huge brilliant sound.  
  • The Paul Butcher 65.6MS features the #1 Backbore. 
  • The added volume and a slightly lower alpha angle than the S Cup gives the player more lip room.  
  • An ideal solution for players who find that the GR S cup is a bit tight for them.  
  • The sound is big and full with an excellent core.  
  • It has less edge than the S Cup and works well in all playing situations. 

S-B and M-B Cups

The Ultimate High Compression Mouthpiece For Players Who Can't Play Shallow Cups!

  • In an effort to please players who have a tough time with the standard GR high compression Z cups, and for those who have a tendency to bottom out on the GR S cups, Gary Radtke has developed the S-B Series Trumpet Mouthpieces.

S-B Cup

  • For those of you who can not tolerate a shallower cup and higher alpha angle, these are the ultimate lead and commercial mouthpieces.  
  • The GR S-B Series Trumpet Mouthpieces are designed using the GR design program so each model will feature that fat GR sound.  
  • Crisp articulations, full low register, amazingly easy upper register are some of the benefits of the S-B design.
  • The S-B Series is specifically designed for players who require the additional chop room to prevent ""bottoming out.""

S-B Model Features:

  • GR Standard rim, #1 Backbore, GR Classic Blank.
  • Standard GR Cup Diameters - 62, 63, 64, 65, 66, 67
  • Medium alpha angle for added chop room. ""High Compression"" throat entrance.
  • Balanced throat length and diameter.

M-B Cup

  • Makes a perfect ""matched set"" to the S-B cup.
  • The M-B was designed for those who want an all around mouthpiece with more chop room than the GR M cup, plus a slightly brighter sound and faster response than the M. 
  • M-B has more upper cup volume than the M but it is tighter in the bottom of the cup and throat entrance.  
  • Even though the M-B and M cups have virtually the same volume, the M-B is not as deep as the M cup.
  • #2 Backbore is standard.

M Cup

  • The M Cup has the same backbore as the MS Cup, the GR #2 backbore.  
  • The M Cup has a slightly lower alpha angle, more volume and more depth than the MS Cup, although, the playing characteristics are similar.  
  • The alpha angle is slightly lower and this is an option when more lip room is needed.  
  • Works very well in a variety of playing situations from commercial to concert work.  
  • An ideal all around mouthpiece with a compact core, vibrant feel, and full of overtones.  This is the most popular GR Cup.

M2 Cup

  • The M2 Cup has a slightly lower alpha angle (same as the MX Cup), slightly more volume, although, the depth and throat entrance are the same as the M Cup.  

 Playing characteristics are similar to the M Cup.  

  • The alpha angle is slightly lower than the M Cup and this is an option when more lip room is needed.  
  • Works very well in a variety of playing situations from commercial to concert work.  
  • The M2 Cup is often used by players that play larger volume cups for most of their work but occasionally require more compression and sizzle without sacrificing lip room.  
  • Think of this as an M cup with more chop room. 
  • M2 features the GR #2 backbore.

MX Cup

  • The MX Cup has many of the same characteristics as the MS, M, and M2 Cups.  
  • It has more volume and more cup depth, lower alpha angle than the M Cup, and the larger GR #3 Backbore.  
  • This mouthpiece is excellent on Bb and C trumpet.  
  • MX is one of the more popular mouthpieces of choice for C trumpet.  
  • It is particularly well suited to students, part time C trumpet players, and top studio musicians that want an efficient C trumpet mouthpiece.  
  • The MX cup offers more blow resistance than the VC or CX cups.  
  • This cup is popular for larger less resistant horns and also for lighter chamber work.   
  • The MX Cup projects well throughout the Concert Hall.   
  • The tone is brilliant and very even throughout all registers.  
  • The upper register speaks very easily with precise intonation.   
  • Light articulation is also very easy with the MX Cup.  
  • If you are looking for a cup that is fat, precise, and brilliant, the MX cup is an ideal choice.

L Cup

  • The L Cup has a lower alpha angle, increased depth, slightly more volume than the  MX Cup, and a  #3 Backbore.  
  • Although this mouthpiece is excellent on the C trumpet, many players prefer the vibrant feel of it on the Bb trumpet.  
  • The sound presence is around you where the MX cup projects with a sound that is more direct.  
  • This cup plays very evenly throughout the registers and the sound is rich with resonant overtones.  
  • Preferred for Concert Band, Wind Ensemble, Brass Quintet, Chamber Work, Orchestral Work, Solo Work, and Jazz.

LX Cup

  • The LX Cup has a very large cup volume, increased depth, an alpha angle much lower than the L Cup, and a #3 Backbore. 
  • This allows for a lot of lip engagement into the mouthpiece.  
  • A strong embouchure is required to control this mouthpiece and maintain endurance, but the pay off is  a huge sound, a full spectrum of overtones, and an evenness and brilliance throughout the horn unmatched with ""conventional"" mouthpieces of a similar volume. 
  • Projection is excellent.  Works well on the C and Bb trumpet. 
  • An outstanding orchestral and solo mouthpiece, used by top orchestral players the world over.

VC Cup

  • This is a special mouthpiece designed specifically for use on the C trumpet.
  • The rim is a standard GR with the same alpha angle as the L cup.  
  •  The upper cup has a little larger radius as does the lower cup and a lower beta angle. 
  • This formula makes more of a V shaped cup but articulation and  brilliance are outstanding.  
  • The VC Cup was designed to project in the orchestra.
  • The throat entrance is a shape that is excellent on the C trumpet.  
  • The sound is big and projects in a rich brilliant manner, furthermore, it is very easy to shade and color.  
  • The upper register is efficient and strong while the lower is warm and rich.
  • The throat entrance, throat, and bore are a little more open than the standard MX, L, and LX.  
  • This mouthpiece can be played on Bb with good results, although, requires a very strong player. 
  • Many players use the 66L or 67L on Bb trumpet and the 66VC or 67VC on C trumpet.  
  • This is an excellent choice for symphonic applications and use in other large ensembles. 
  •  It offers the serious C trumpet player a huge symphonic sound that really projects.

VB Cup

  • The VB cup has the same parameters as the VC for the rim and upper cup. 
  • The throat entrance and bore are tighter and this mouthpiece doesn't require as much work. 
  • This works well on the Bb for concert band to jazz work. It is also good the C trumpet.  
  • This mouthpiece was designed for players that find the VC too open.

C Series Cups

C* Cups

  •  Feature the GR Classic Blank, GR Standard Rim, and GR #3 Backbore. 
  • The C* was designed for all-around Bb use featuring a higher alpha angle (similar to M cup) and a larger cup volume.  
  • This design allows for added lip support and efficient playing characteristics throughout the range of the trumpet. 
  • The C* has an improved throat entrance over older ""conventional"" C cup designs which allows improved articulation, accuracy, and efficiency, along with a pure core of sound not found on most traditional mouthpieces.
  • The C* has a beautiful full sound with excellent projection, as well as, the ability to blend in any situation.  
  • The C* will be a great choice for the student, amateur, and professional.  
  • The C* has been use successfully on the D/Eb trumpet as well as the C trumpet. 
  • If you play a very open set up and require more resistance an excellent option is the C* cup with the GR #2 Backbore.

All the C Series (C*, C**, and C) have the same rim, alpha angle, L1, and 1st cup radius (R1) to provide easy accommodation when switching between Bb, C, and D/Eb, as well as, accommodating other playing requirements.

C** Cups

  • Feature the GR Symphonic Blank, GR Standard Rims, and GR #3 Backbore. 
  • The C** was designed to have a similar blow and feel to older traditional C cup designs, although, improving intonation, slotting, articulation and efficiency.  
  • It is an excellent choice for the Bb and C trumpet featuring a higher alpha angle (similar to M cup) and a larger cup volume. 
  • The design allows for added lip support and efficient playing characteristics throughout the range of the trumpet. 
  • The C** has a more open throat entrance than the C* requiring more strength.  
  • The C** is a powerful mouthpiece that has a great volume of sound, good articulation, and excellent projection. 
  • The C** will be a good choice for the orchestra, concert band, solo work, or quintet. 

C Cups

  • Feature the GR Symphonic Blank, GR Standard Rims, and GR #3 Backbore.
  • The C has a more open throat entrance than the C* and C**, furthermore, it requires a strong player. 
  • The C design features a higher alpha angle (similar to M cup), a larger cup volume, very open throat entrance, and huge orchestral sound.  
  • The design allows for added lip support and efficient playing characteristics. 
  • The C is a very powerful mouthpiece that has a great volume of sound, good articulation, and excellent projection.  
  • The C is the preferred choice for the orchestra, as well as, for very powerful players requiring a more efficient alpha angle.

CX Cup

  • The CX Cup has a very large cup volume, increased throat entrance, and an alpha angle that is the same as the LX Cup. 
  • This allows for a lot of lip engagement into the mouthpiece.  
  • A strong embouchure is required to control this mouthpiece and maintain endurance.  
  • Sound is large with a full spectrum of overtones, even, and brilliant throughout the horn.  
  • The larger throat entrance and throat bore is a good match for the C trumpet and it has a #3 Backbore.  
  • Projection is good, although, it has a strong presence of sound near and around the player.  
  • Designed for C trumpet players who use the LX Cup on the Bb trumpet.  
  • An outstanding orchestral and solo mouthpiece.

BX Cup

  • The BX cup is similar to a traditional ""B"" style cup.  
  • It has a very open design and requires a strong player like the VC cup, and has a #3 Backbore.   
  • This mouthpiece is excellent on the C trumpet and has a brilliant tone that really projects across the orchestra hall.  
  • Not recommended for players that use a lot of lip engagement.

C-T, B-T, CT-Z Cups

C-T Cup

  • This rim has characteristics of an old 1C, although certain rim parameters have been changed to make this mouthpiece more efficient. 
  • The 67C-T mouthpiece was designed for the C trumpet, but it is also a good match for certain Bb trumpets.  
  • The alpha angle is raised slightly to enhance articulation for a player that must work very hard to play a 1C style mouthpiece.  
  • The 1st cup radius or R1 has been slightly increased over older 1C designs to increase efficiency and provide a fat vibrant sound.
  • The throat bore is larger than the standard #27.  The Backbore is a #3 and a GR Classic Blank is standard. 
  • There is an option to have the 67C-T made with the GR Symphonic Blank that is slightly shorter and has a more open blow.  
  • The 67C-T produces an incredible Orchestral Sound.

B-T Cup

  • 67B-T Has all the same characteristic as the 67C-T, although, the throat entrance has been adapted to accommodate the Bb trumpet.

CT-Z Cup

  • While retaining a similar feel as the B-T and C-T cups, the CT-Z is a high compression cup designed for players who are used to a wider diameter mouthpiece. 
  • This versatile cup is ideal for pops or commercial work but is designed with a lot of lip room for players who use chop engagement. 
  • Scream all night without bottoming out!


GR offers 4 standard Trumpet Mouthpiece Backbores.
  • Each backbore has been meticulously designed to provide the player with fast, clear articulations, unmatched sound, and centered intonation.  
  • Standard GR Backbores have been chosen to match particular cups in the GR line. 
  • The player may choose a different GR backbore as a custom option to match musical needs or particular horns.
T-72S Backbore
  • Our tightest Commercial Backbore. 
  • High compression with a huge fat core of sound. More free blowing than conventional ""commercial"" backbores with a bigger sound! Ideal for large bore horns. 
  • May be purchased with optional ear plugs for saxophone players. 
  • Projects like a laser. A really big one.
#1 Backbore
  • Our standard commercial backbore. 
  • More free blowing then the T-72S. Bigger sound, huge in fact! 
  •  Compression with a ton of fatness in the sound. 
  • Projects a bigger core of sound than T-72.
#2 Backbore
  • Our standard ""all around"" backbore. 
  • This plays big and brilliant - full of overtones. 
  • Ideal for all styles of playing from commercial to symphonic. 
  • Quick snappy articulations. 
  • Blow resistance seems to be closer to you down low and a bit farther away up high. 
  • Our most popular backbore!
#3 Backbore
  • Our standard ""Symphonic"" backbore. More open than the #2. 
  • Ideal for C trumpet and features everything that the #2 provides, but with a more open blow. 
  • Massive sound with an open feel.

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