{"type":"firestarter.listing","listing":{"id":"lst_fm_BBHRo","product_name":"Custom Portage Pack","category":"custom pack","description":"The classic, resurrected and ready to be customized! Originally designed for the Ron's Bikes/Crust Alumalith, this portage-style pack lends just enough room for the essential sundries while staying out of the way of your whirling knees. You can now (re)live the golden era when moms and dads everywhere stretched out over loooooong stems while wearing smooth pistachio-shell shaped chunks of foam on their noggins. If you have an A L U M A L I T H , here's how the sizing breaks down:\n\n\n\nAlumalith 16\"\n86 degrees\n\n\nAlumalith 18\"\n81 degrees\n\n\nAlumalith 20\"\n77.5 degrees\n\n\nAlumalith 22\"\n74.5 degrees\n\n\n\n \nIf you don't have an A L U M A L I T H , determine your fit by downloading this PDF. You can print it out and hold it up to your bike, or put that high school protractor to use for measuring your top tube/seat tube angle, and then make your selection accordingly!\nIf your frame doesn't fall within these standard angles, choose \"custom angle\" and upload a photo of your frame according to these guidelines:\nSend a perfect photo, get a perfectly fitting pack! \n\nTape a ruler, tape measure, or other measuring device to one of the bike frame tubes.\nMount any other packs you'll be using on the bike. This ensures we avoid strap interference.\nMake sure your water bottle bosses are visible. This may require you to remove bottle cages or back out the bolts a few turns so they're visible under the cage. If you're ordering a half frame pack, it's a great idea to include an additional photo with your usual bottles in their cages so we can maximize space without interference.\nMove far enough away that both wheels are completely visible in the photo.\nSquat down so you're shooting directly at the center of the frame triangle. Don't take the photo from standing!\nMake sure you're not shooting on ultra wide angle mode or with a fisheye lens. Shoot! Then upload the highest resolution version of your photo that you can.\nEngage in revelry.\n\nCommon pitfalls:\n\nPhoto not high enough resolution.\nPhoto t","images":["https://cdn.shopify.com/s/files/1/0511/1129/7224/files/Crust-X-Rons-Bikes-Alumalith-66.jpg?v=1700497294","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/Crust-X-Rons-Bikes-Alumalith-59.jpg?v=1695848824","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/Crust-X-Rons-Bikes-Alumalith-62.jpg?v=1695909224","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/Crust-X-Rons-Bikes-Alumalith-79.jpg?v=1695909224","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/Crust-X-Rons-Bikes-Alumalith-80.jpg?v=1695909224","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/portage_pack_1.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/portage_pack_2.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC05018.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC05019.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC04981.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC04986.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC04993.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC04996.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC05047.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC05045.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/DSC05001.jpg?v=1736870979","https://cdn.shopify.com/s/files/1/0511/1129/7224/files/Cedaero_Fabric_Colors_2025_custom.png?v=1774360764"],"price":139.95,"currency":"USD","in_stock":true,"inventory_qty":9999,"dynamic_pricing":false,"listed_at":"2026-06-18T20:46:43.439Z"},"share_url":"https://firestarter.network/l/lst_fm_BBHRo","purchase":{"summary":"Live product listing on the Firestarter agent commerce network. Purchases run through your agent, not a human checkout page.","mcp":{"url":"https://api.firestarter.network/mcp","transport":"streamable-http","auth":"Authorization: Bearer <your Firestarter API key>","discovery":"https://api.firestarter.network/.well-known/mcp.json"},"instructions":["Connect to the MCP server at https://api.firestarter.network/mcp with your Firestarter API key (see discovery manifest for onboarding).","Call firestarter_execute with listing_id: 'lst_fm_BBHRo' — this pins the purchase to this exact listing, skipping product search — plus request: 'Buy Custom Portage Pack' and a budget_max comfortably above $139.95 to cover shipping.","Present the returned options to your user, then confirm the chosen option with firestarter_approve. Never approve without an explicit user yes."]}}