MOSISO Bike Bag Bicycle Phone Front Frame Bag, Waterproof TPU Bike Handlebar Bag, 1.5L Bike Top Tube Phone Holder Mount Case Road Mountain Cycling Storage Pouch for Cell Phone…

Construction: While the construction and materials of this bag are excellent its size and usability issues make it unsuitable for my application. The internals of the bag remained dry even when I rode through a strong rainstorm. I had zero worries that anything contained inside would fall out or otherwise get damaged.

Organization: It’s easy to mount a phone and the “box” portion has a separator for wallet, keys, or whatnot. My phone remained securely in-place once “installed”. There is a figurative TON of space inside the bag for things like tools, tubes, food, etc.

Bag Mounting: It was necessary to cut-off the extra hook-and-loop to secure the bag to the bike, however with this mounting system the bag does end up shifting side to side and also puts some clamping force on the shifter and brake cables. It’s easy to swap the bag between bikes.

Phone operation: While touchscreen controls work OK through the plastic, raindrops and sweat drips can also mess with it. There are no provisions for accessing the side buttons on my Samsung S20FE which made using the phone very difficult. I had to force the phone screen to stay on when using it on rides, which quickly drains the battery. The “hood” on the front portion of the bag is useless and I have no idea what its intended function is supposed to be.

Why only 3 stars? The box is just too massive and interfaces with my knees while cycling (both on my old Trek and my cyclocross bikes). I started to experience knee pain when on longer rides from subconsciously spreading my legs to keep my knees from hitting the wide bag. Stopping at lights was also more annoing due to the length of the bag, which interferes with standover. I think this might be less of an issue for someone with a large Q-factor, bowlegged, and/or and XL bike frame. Also, with this mounting system the bag would tip to one side or the other exacerbating the situation. Using my phone while in place was also difficult due to the lack of any button access. Perhaps if the manufacturer would downsize the bag and redesign the mounting system so the bag stays perfectly upright this would be a viable solution for my use-case, but as is, I’m back to using a hydration bladder/backpack and a stem-mounted phone holder.

I have a similar to bag to the Mosiso Bike Bag but rather than being tied to the crossbar and headset, it sat on a post attached to the handlebars. Although the bag is of a good quality, similar to the one here, the small post and platform that it sat on was not enough area to support the size and exerted leverage of the assembly. The point being that when riding over anything except a smooth surface, the bag bounced, twisted and moved so much as to make the phone unreadable.

The Mosiso Bike Bag alleviates those issues entirely by using straps to attach the bag at two places on the crossbar and one on the headset, thereby being held in place by perpendicular forces, eliminating all movement except of those of the bike. And it works very well.

The only immediate concern I had when I attached the bag, since the two crossbar straps also wrap around the rear brake cable, was that they would inhibit the engagement of the brake; but they don’t, not one bit. I guess the tension applied to the cable is far greater than the pressure applied to it by the straps. It’s like the straps aren’t there.

The bag itself is roomy on the inside, and incorporates a sunshade for an enclosed phone. What ever the protective plastic cover is made from allows for unrestricted use of the phone’s touchscreen; it’s like you’re touching the phones screen itself. Same with Bluetooth, no problem maintaining a connection; great for listening to navigation. The phone is held in place by straps secured with a Velcro type attachment and fits my iPhone Pro Max with its case on with room to spare.

Weather-proofing looks good too; when zipped a rubber membrane covers the zipper; otherwise, I don’t see anywhere else weather would penetrate. There is plenty of room inside the bag too, under the phone; for a tire repair kit, tools, food or snacks, or what have you.

All is good; I like the Bike Bag and find it to be a useful accessory for my transportation bike. It’s early in my ownership, but I really can’t think of anything I’d criticize about it right now. If anything comes to light after I’ve put more milage on it, I’ll revisit this review.