Standardized Rim variations in 14 diameters in 6 shapes
Over 25 years of working with thousands of trumpet players led to these new options
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
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Harrelson Rim Cross Reference to other brands
All Rims below were measured with a high accuracy Mitutoyo CMM and verified with a 2022 Keyence CMM at Harrelson
All Rims below were measured with a high accuracy Mitutoyo CMM and verified with a 2022 Keyence CMM at Harrelson
NOTE: At Harrelson, we measure the actual Rim diameter where it meets the cup. Most other manufacturers measure the high point of the rim, which results in an inflated number not representative of the actual size. This means that any manufacturer using a high point value for a specific size is likely overstating the diameter by 40-50 thousandths of an inch. Our 680 rim is larger in diameter than any rim we have ever measured, so it is unlikely you need to order something larger than 640 unless you play on very large rims.
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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 [email protected] |
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We no longer offer exchanges or returns on shipped 5MM kits and components
The spanner wrench should only be used as a last resort for REMOVAL ONLY
It is not necessary to use this when installing a new rim if you follow these instructions:
The break in process is necessary with any components that have been plated silver or gold.
It is not necessary to use this when installing a new rim if you follow these instructions:
- apply silicone grease to all threads
- wrap rim in masking tape to add grip and reduce risk of scratches
- screw in cup a few times to loosen up threads
- screw into body a few times to loosen up threads
- assemble rim, cup, throat into body and tighten a few times
The break in process is necessary with any components that have been plated silver or gold.