Review on Ibera Triangle Frame Bag: Organize and Carry Essentials on Your Bicycle! by Mark Turner

I bought this for my brother's plus size bike and it's the perfect size for his bike. He rides a Trek 3500 that he converted into an electric bike. - He mainly uses it to store all his e-bike junk and it easily fits a controller and two 6-cell LiPo batteries. He used to keep everything in a rear bike rack bag, but this triangular bag is so much better and he ditches the rear bag in favor of this one. - We plan to coat it with waterproofing spray to make it more secure, BUT it's relatively waterproof as is. I would trust him when driving in normal rain. - The only thing it doesn't like is that it covers the water bottle holder, but that was obvious when we picked it up. - Very impressed with its overall design.