Bb/F Tenor Trombone

The medium/large bore R3 trombone and the large bore R4 are available with an F valve section with the designation of R3F and R4F.

Michael Rath also offers the R4 and R4F models with "in slide" tuning,

Two valve choices are available, both Swiss designed: the René Hagmann valve or the Willson Rotax valve. The Hagmann is free flowing and well balanced between open and closed operation. The Rotax has a more traditional feel, offering a little more resistance, preferred by many players.

Because of the modular construction of Michael Rath custom trombones you can remove the valve section and replace it with a detachable gooseneck, available as an option, creating a straight tenor trombone. Similarly, if you already own a “straight” R3 or R4, you can purchase just the F valve section to fit your instrument. 

R3/R4 Detachable Gooseneck

 R3 4 Gooseneck Cut out 450 370


450 750 R4F nickel screw bell


R4F with star design2

  450 740 Rotax and Hagman Close up2
    R4F St (slide tuning)    

R4Fst Bell section 500 352

 R4 Nickel Brushed bell screw ring                     


Close up valve3
Model Bore Bell Flare
R3F 0.525" 8"
R4F 0.547" 8 1/2"
R4ST Bb .547" 8 1/2"
R4FST Bb/F .547" 8 1/2"

How to order

If you’re in the UK, please contact us to arrange a testing session at our workshop and showroom.

0% interest free credit is available to UK customers, subject to terms and conditions. For full details, please contact us.

If you’re a student at a UK school then you may be eligible to order your Rath trombone without paying VAT on the Assisted Instrument Purchase Scheme.

If you’re outside the UK, please contact your nearest Rath dealer for further information, or alternatively we’ll be happy to help you.