Rims for Trompet Mouthpieces



The function of the rim contour of mouthpieces is to support the vibration of the lips as much as possible. Consequently it shall neither be too wide (blocking) nor too narrow (cutting). A good rim should enable the musician to play over a long period of time. Extreme forms of shapes should not be taken into consideration (very steep curvature of the rim down to the outside or inside, too wide, too narrow).

To me it is personally very important to provide the musician with a perfectly fitting rim.

Who else if not the musician could tell us best what the ideal rim shape is?

Therefore we are permanently extending our range of rims or create customized rims on demand.

Some of our rims are available on one-piece Standard trumpet mouthpieces.


Our standard rims are described in the table below.



Model Nominal Width *) Outer Ø Highest Point Cup Width Comment
7D-B 15,974 27,875 19,998 B Comparable to Bach 7DW (1988)
EP-B 16,000 26,993 20,157 B Round and narrow, for Piccolo
BB-C 16,096 27,890 21,000 C For Piccolo, Karl Breslmair sen. 1975
L8-C 16,180 26,776 20,254 C Contour of the famous rim L (Levora), just with diameter 15.8 mm
W-D 16,306 28,600 20,890 D Cushion rim W in a tight version
V16-E 16,477 26,915 20,619 E Contour of model V with reduced diameter (-0.2 mm)
7C-E 16,593 26,850 20,032 E Similar to Bach 7C (1992)
A 16,606 27,799 21,010 G Round and comfortable
14 16,610 27,157 20,616 D Similar to Schilke 14
E4-G 16,633 27,626 20,790 G Designed for Hans Gansch, old Viennese contour, similar to 15E4
112 16,645 27,210 20,449 G Similar V. Bach 1 1/2
GT 16,656 27,472 20,609 G Designed for Gabor Tarkoevy, Berliner Philh.
3 16,694 27,220 20,743 G Designed for Arnold Mehl, Bach-Trompetenensemble München
W 16,706 29,000 21,290 G Wide cushion rim with inner form according Model G
K 16,721 28,000 21,290 G Similar to model G, just increased outer diameter
G 16,722 27,500 21,032 G Standardrim of Breslmair G-series, very good accoustic results
L 16,780 27,376 20,854 G Rim of Prof. J. Levora, Teacher of Prof. J. Pomberger
3C 16,824 27,300 20,809 G Rim of Tamas Velenczei (Berlin Philh.)copy of 3C Mt. Vernon
H 16,869 27,442 20,681 G Comfortable, narrow,
4X 16,876 28,199 20,923 E Similar to DW 4X, Helmut Demmer, NÖ Tonkünstler
V 16,877 27,315 21,019 G Similar to 1 1/4, formidable feeling and good intonation
17 16,910 27,457 21,173 G Comparable to Schilke 17
14X 16,913 27,426 20,960 G Adam Rixer (Luxemburg) old 1 1/4C Mt. Vernon
1C-i 16,950 27,261 20,511 i Similar to 1C (1996)

Note: Rim models labeled without any extension (e.g. -D) indicating a cup-width fitting to G-series underparts or greater. 

Measure values in millimeter. Intentionally we used the values from our technical drawings with thousandth of millimeter.

*) regarding diameter and width of a rim refer to our technical description


Use your Adobe Reader to open the pdf-file.
Activate/deactivate the layer of the rim you want to compare with others. Initially all the layers are set ON.


Standard Rims Comparison
Adobe Acrobat Dokument 12.9 KB
Main Rim Measure Values
Main Rim Measure Values_ENG.pdf
Adobe Acrobat Dokument 59.9 KB


click for downloading the PDF-file

click onto the drawing to enlarge

50 52 A B C D W E 63 G H i J K L 70 73 76
15,00 15,20 15,30 15,60 15,80 16,00 16,10 16,20 16,30 16,40 16,50 16,60 16,70 16,75 16,80 17,00 17,30 17,60

We endeavor in assisting you to find your favourite mouthpiece. In achieving that we designed hundreds of rims and cups in the past years, some of them are meanwhile reliable tools both of esteemed artists and talented brass musicians all over the world. To keep an overview amongst all the models and to understand the model designation take this example:


Rim-labeling: AH2-E

  • Rim of Prof. Adolf HOLLER (Wr. Philh. † 2011), Version 2
  • E substitutes the value 16,2 mm according the table above

The conclusion is to assemble that rim with cups labeled with [model]-E or greater to omit a step between rim and cup.

Further Information you will receive from the Team Breslmair, the maker of your individual mouthpiece.