Harrelson Trumpets
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Standardized Rim variations in 14 diameters in 5 shapes
Over 25 years of working with thousands of trumpet players led to these new options

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SpectraTone Size - this 3 digit number is measured at the very bottom diameter of the Rim
where it meets the Cup

Rim OD Shape - the outside curve shape which is often characteristic of a specific brand
  • No designation = standard shape
  • W = wide variation of a standard rim
  • X = semi-flat variation
  • Y = flat variation
  • Z = very flat variation
Harrelson Rim Cross Reference to other brands
All Rims below were measured with a high accuracy Mitutoyo CMM at Harrelson

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Rim Size Reference
The SpectraTone Mouthpiece is available in every single size allowing you to improve upon the parameters of any brand/model mouthpiece and combine them with other sizes. The SpectraTone equivalent to a Bach 3 rim is the 614 which may be combined with any cup, throat and backbore to create your own custom mouthpiece configuration. 

Ask us and we'll get you started on your 5MM in a matter of minutes.

Call 303.657.2747 or email harrelsontrumpets@gmail.com





We no longer offer exchanges or returns on shipped 5MM kits and components

  • Performance
    • SpectraTone
    • Build My Mouthpiece >
      • Intro to Mouthpieces
      • Artist Series >
        • Artist Bodies
        • Artist Rims
    • Mouthpiece Components >
      • Rim Sizes
      • Cup Sizes
      • Throat Sizes
      • Body Sizes
      • Backbore Sizes
      • Nut Sizes
    • Increase Efficiency >
      • Mod Kits
      • Finger Button Options
    • Adjustable Performance
    • Adjustable Peformance Tools
  • Advantage
    • Trumpet Momentum
    • The Harrelson Story
    • We have Your size
    • Technology
    • 100% Guarantee
  • Instruments
    • Model Comparison
    • Buy A Harrelson
    • Muse Modular MMXX
    • 2021 VPS Summit G-Series
    • "X" Series
    • Limited Editions >
      • Summit One
      • Summit Midnight
      • Summit Art
    • Bravura Series >
      • 2021 Bravura Flugelhorn
      • 2021 Bravura Piccolo
    • 2018 VPS Summit Series
    • HT6 - Kickstarter 2022
    • VPS Summit Eb
    • Acoustic Armour
    • Trumpet Gallery
  • News
    • Jason's Blog >
      • Jason Harrelson
    • Lessons Link
    • Teacher Information
    • Weekly Trumpet Challenge
    • Get Social
    • Clinics & Tours
    • Our Clients >
      • Client Features
    • Jen's Blog
    • Company History
  • Clients
    • Contests & Winners
    • Order My Trumpet >
      • Leadpipes & Bells
      • Tuning Slides & Bell Crooks
      • Receivers
      • Bottom Cap options
      • Water Keys
    • Contact Us
    • Shipping
    • Instrument Registry
    • Acclimation
    • Maintenance
    • Roots of Music
  • Store