>>1361131Ive never looked into this for road bikes
but I have wondered how to attach bags to fully suspended bikes
many involve the use of attachments to the fork ends and brake bosses / booster arch
along with extended bolts and sometimes u shakels (Axiom Journey Disc Lowrider)
>DIY solutionsor at the least not quite as strong
for example a rubber lined p clamp could be used on the rear chain stays or for the front forks near the crown
https://www.bikecommuters.com/2008/07/19/p-clamps-are-your-friends/