Materials

-CNC machined 6061 aluminium
-SUS Bolts

Compatibility

-22.2mm KNOG Oi Prima Bell
-Both Garmin and Wahoo JRC Components Computer
Mounts
-*Please note this adaptor is not compatible with our JRC
Twist-Switch TT Mounts*
-Width between bolt holes is 22mm rather than 20mm used
by many other companies making this adaptor specific to
JRC Components computer mounts.

Included

-1x Fully CNC'd underbell(y) adaptor w/ stainless fixing bolts
-1x KNOG Oi Prima Bike Bell (22.2mm)
-1x M2 Hex Key

Weight

-Adaptor: 20g (with bolts) / -Oi Prima: 21g

Underbell(y) Integration Kit | JRC x Knog

Underbell(y) Integration Kit | JRC x Knog

£33.00 GBP
£33.00 GBP
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100% of buyers have recommended this.
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The JRC Components × KNOG Underbell(y) Integration Kit combines our CNC-machined aluminium Underbell(y) adaptor with the included 22.2mm KNOG Oi Prima Bike Bell.

Designed specifically for compatible JRC Components Garmin and Wahoo out-front computer mounts, it positions the bell neatly beneath your mount for a clean, low-profile cockpit setup.

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Materials

-CNC machined 6061 aluminium
-SUS Bolts

Compatibility

-22.2mm KNOG Oi Prima Bell
-Both Garmin and Wahoo JRC Components Computer
Mounts
-*Please note this adaptor is not compatible with our JRC
Twist-Switch TT Mounts*
-Width between bolt holes is 22mm rather than 20mm used
by many other companies making this adaptor specific to
JRC Components computer mounts.

Included

-1x Fully CNC'd underbell(y) adaptor w/ stainless fixing bolts
-1x KNOG Oi Prima Bike Bell (22.2mm)
-1x M2 Hex Key

Weight

-Adaptor: 20g (with bolts) / -Oi Prima: 21g

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Discreet by Design: JRC × KNOG UNDERBELL(Y) Integration Kit

Discreet by Design: JRC × KNOG UNDERBELL(Y) Integration Kit

Refine your setup with the JRC Components UNDERBELL(Y) Adaptor, designed to position the KNOG Oi Prima 22.2mm bell discreetly beneath your bike computer. Its low-profile placement keeps the bell almost entirely out of view, preserving a clean and uncluttered cockpit without compromising accessibility or function. Lightweight, secure and seamlessly integrated, it’s the perfect solution for riders who value understated design and practical performance.

Description
FAQs
Product Manual

Precision Integration. Perfect Tone.

Looking to add a premium bell to your bike without cluttering your cockpit?
The JRC Components × KNOG Underbell(y) Integration Kit combines our lightweight CNC-machined adaptor with the included 22.2mm KNOG Oi Prima Bike Bell, positioning the bell neatly beneath our range of JRC Components computer mounts. 

The Oi Prima bike bell features KNOG’s distinctive wrap-around design and latest WAVETEK hammer technology. Its innovative hammer mechanism delivers a clear, consistent tone with every ring, while the compact low-profile design keeps your setup clean, tidy and built for everyday use. 

Spec:

  • Fully CNC-machined 6061 aluminium JRC Underbell(y) adaptor.

  • Supplied with 22.2mm KNOG Oi Prima Bike Bell.

  • Fixes beneath compatible JRC Components out-front computer mounts.

  • 360-degree rotational adjustment for optimal bell positioning.

  • Signature KNOG wrap-around bell design.

  • Features KNOG WAVETEK hammer technology.

  • Robust spring and hammer construction for long-lasting performance.

  • Beautiful tone that is loud, clear and pleasant.

Compatibility:

  • Both Garmin and Wahoo JRC Components Computer Mounts
      *Please note this adaptor is not compatible with our JRC Twist-Switch TT Mounts*

  • Designed for JRC mounts with 22mm underside bolt spacing, rather than the 20mm spacing used by many other brands, making this adaptor specific to JRC Components computer mounts.

  • Please note: the Underbell(y) mounts to the underside bolts of your JRC computer mount, and therefore cannot be fitted alongside an existing friction adaptor (e.g. GoPro-style camera or light adaptors) 

Have you found what you are looking for?

FAQs

Will this adaptor fit my current mount? This mount is designed solely for JRC computer mounts and is not suitable for non-JRC 20mm hole-width mounts.

I have a JRC Twist-Switch TT mount. Can I use the Bell Adaptor with that? Unfortunately no. The TT mount has a switch underneath and is without a mounting point for the bell adaptor there.

How tight should the 3mm mounting bolts for the adaptor/computer mount interface be? 2Nm only. They should be tightened using a fresh, square-edged 2mm hex key.

Files

pdf Instructions_for_Underbell_y_Kit.pdf Download