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GroupJ Email Addresses

For Information about our products, ordering, or price list: info@groupj.net
For technical questions about our products or product support: help@groupj.net

Phone Support

Leave a message at our home office and we will get right back to you: 619-441-8870

GroupJ Paypal Address

For orders via Paypal: ​sales@groupj.net

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​This site is designed to provide the amateur and professional bike builder with all the tools and information needed for frame conversion or new bike design.
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  • Home
  • Bicycle Frame Couplings
    • JBob Design and Installation Guide
  • Contact Us
  • Blog