Detail 01
Large shank
Only fits large-bore trombone leadpipes. A small-shank horn needs a different mouthpiece or an adapter.

Independent shopping perspective
Large-shank 5GS trombone mouthpiece from Bach. Wide cup with a deep, funnel-leaning bowl — aimed at bass and large-bore tenor players who need low-register weight.


Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
Only fits large-bore trombone leadpipes. A small-shank horn needs a different mouthpiece or an adapter.
Detail 02
Wide rim diameter spreads pressure over more lip. More endurance for some players, less control for small embouchures.
Detail 03
Deeper, more conical cup than a plain G. Darker low end, more air required to fill the horn.
Detail 04
Bach cup and rim numbering is the reference most trombone players compare other brands against.
Detail 05
Standard-line pricing, not a custom or hand-finished piece. Replaceable without much thought if lost.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
Most student tenor trombones use a small shank, so it will not fit. Large shank fits bass trombones and large-bore tenors. Check your receiver first.
Same rim size family, different cup. The S is deeper and more funnel-shaped, which favors low-register weight and a darker sound over upper-register brightness.
Yes. The wide rim and deep cup are aimed at bass and large-bore playing, where low-register fullness matters more than high-range ease.
Adapters exist but change the gap between mouthpiece and leadpipe, which affects response and intonation. Better to buy the shank your horn takes.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.