ROCKBROS Bike Trunk Bag 17L-45L Bike Rear Rack Bag Waterproof

Summary: We would buy this bag again!Great rear storage bag for our Lectric brand electric bike. The center top pouch area holds six plastic bottles easily (water and diet soda in our case). The side pouches open and extend to larger side pouches, but we found we don't need the extra space. The side pouches easily hold the bike repair kit, charger, and bag rain cover. The bag easily attaches securely to the flat rear rack on our ebike via the bag's sewn on velcro straps.

Very well constructed bag. I thought that the main storage compartment would be bigger but it will work fine for what I need.

It looks good on my bike man!

Nice bag that seems durable and sturdy. I like that it opens on the long edge to access from the “back” like a real trunk. I also like the little pocket on the front. Not yet sure how I feel about the handle straps being attached to the lid rather than the bag itself. Compared to other truck bags, they cheaped out on conveniences like interior side pockets and dual zippers on the foldout pannier bags. I think you can find similar quality outter case and build with everything you want (and don’t know you need) for similar or less, so don’t stay stuck on this option unless there’s something unique you like about it.

This is a well constructed trunk bag, with ample storage. I like such features as the hidden pannier bags and included shoulder strap, so you can easily take it with you. However, it was nearly impossible for me to secure the bag to my MIK-compatible rack using the bag’s Velcro straps. My e-bike has a fender, leaving little space between the fender and the rack. You have to snake the Velcro strap under the rack, through the buckle on the bottom of the bike bag, and then back underneath again to secure it. My bike probably offered an inch of space between the fender and the rack, making it very difficult to tighten the Velcro enough to secure the bag. I bought an MIK base plate and just attached it today. If you’re buying this bag and think you’ll want to detach the bag from your bike regularly, get the adapter plate. However, those Velcro straps are now in the way. If I fasten them over the base plate, I can’t snap the plate onto my rack. I hate to cut them off, because as soon as I do, I’ll realize they might come in handy for something else. I haven’t spent much time using the bag yet, but I’m not impressed with the Velcro attachment system. But, now that my Rockbros trunk bag is securely attached to my bike, I look forward to putting several miles on it.

Works very well and expands like crazy so it'll work for us very well

This bag is the bomb! We love it!!

I really like this bag, especially at the price. One thing I don't like about it is that it's kind of fiddly getting it on and off the rack -- I would appreciate some sort of quick release solution that doesn't involve wresting with velcro straps in an awkward position. Other than that, I think it's darn near perfect for my needs (which involve occasional commuting on my Aventon Level.2).The real reason I'm posting the review though is to let anyone interested know something I couldn't confirm before I ordered it -- which is whether my 14" laptop would fit into the side pannier. The answer is -- it does! Very nicely in fact, tucked into its padded laptop sleeve.I'm reserving judgment on longevity of the build, but so far (early days, mind you) -- five stars.