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  • Avenir Bigmouth Velcro Seat Bag (Large- 75/106 Cubic Inches)
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Avenir Bigmouth Seat Bag

by Avenir

Price: $11.49 - $46.52
Black
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  • Features:Full-zip, wide-mouth design and Velcro attachment1682D Nylon construction with rubberized bottom for unparalleled durabilityReflective light mounting tabMedium and large sizes are expandable

Product Description

The Avenir Bigmouth Seat Bag has been a staple in the cycling indusry for years. Made of durable nylon and rubber, these bags will last well past their legacy.

Product Details

  • Shipping Weight: 2 pounds (View shipping rates and policies)
  • ASIN: B00KC4OLC2
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (471 customer reviews)
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Customer Reviews

4.5 out of 5 stars

Most Helpful Customer Reviews

143 of 146 people found the following review helpful By R. Vincent on November 10, 2008
Color Name: BlackSize Name: Large- 75/106cu in
As good as you'll find... It holds a deceptively large amount of small items. I have a topeak alien II, a cell phone, car key, tube patch, and small pump in mine. It is not pretty on the bike, but functional and secure. The best feature though is it's water resistance. I dumped my bike in a stream (rider error) and there was several minutes during which it was fully submerged. All of my items remained perfectly dry. It was worth every penny and then some.
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119 of 128 people found the following review helpful By trebe TOP 500 REVIEWER on August 5, 2010
Color Name: BlackSize Name: Large- 75/106cu in
Made primarily of Denier Cordura, a heavy duty nylon, the Avenir Bigmouth is a fairly well built underseat bag, with over 100 cubic inches of capacity. For protection and easy cleaning, the bottom and lower half of the sides of the bag, are coated with a layer of plastic sheeting, which repels water, and helps to keep the contents from getting wet. Applying a little silicone spray, helps to loosen up the zippers.

The bag has an adjustable strap that is used to secure it to the underside of the seat. The strap has lots of slack. The construction of bike seats varies, as some have springs below the seat, but there should be a way to make this system work. The rails and springs under the seat, will affect the angle that the bag hangs at, and this in turn affects how the bag is secured to the seat post.

From the product description and photo, at one time this bag utilized a nylon strap and Velcro to secure the bag to the seat post. This unfortunately is no longer the case. There is now a curved plastic fitting that is supposed to clamp around the post, a rubber strap is then supposed to wrap around the post, and hook back onto the fitting. This design is a freaking disaster! In order for this system to work, the fitting must have good solid contact with the seat post, and unfortunately, this can be achieved only at a limited range of angles. If you are out of this range, the rubber strap will be stretched beyond its limits and will be too short to reach. Pulling excessively on the rubber strap, can pull it out from the fitting. If you have problems with attaching using the rubber strap, try securing the fitting to the seat post using tie wraps.
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46 of 48 people found the following review helpful By Rusty P. on July 8, 2009
Color Name: BlackSize Name: Large- 75/106cu in Verified Purchase
We bought this for a trip where we'd be out riding around near a lake (away from the rest of our gear).
We needed a way to tote anything we could think of that we might need for our bikes, so a flat tire or something wouldn't put an end to our riding and put a start to our walking.
We considered a backpack, but that seemed too large and bulky for the amount of stuff we needed to take. Besides, I don't want to personally carry anything that I can mount to a vehicle.

We had looked at a few other bike specific bags, but chose this one because of its shape, quality of materials, and style of mounting
(we looked at them all in person).
It just straps around the under-seat bars and to the seatpost.
The rear strap is adjustable and can be tightened in order to compress the bag a little so your stuff won't rattle.

This bag is plenty large enough for all the things we needed, but it's not large enough to get in the way.
What we put in the bag:
A spare 26" mountain bike tube (still in the box), 5 full size allen wrenches, 3 tire spoons, a patch kit, a flat two-sided open-ended wrench, and an asthma inhaler.

We had some room to spare, and that's without the expansion opened up.

So far we've suffered no problems or failures with this bag.
It has been a very sound purchase, and we would recommend it to anyone that needs a bike bag.
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23 of 24 people found the following review helpful By Tom Tracy VINE VOICE on December 2, 2009
Color Name: BlackSize Name: Large- 75/106cu in Verified Purchase
I sm very pleased with my purchase of this bag. It is all I was looking for at an affordable price. Before ordering, I was torn between this size of the Avenir Bigmouth (Large) or the Medium. I was afraid this one would be too big. But, after seeing a customer submitted photo of the bag actually on a bicycle, it didn't appear to be as big as I feared. Turns out, I was right. It is just the size I wanted for my Trek 7300 hybrid - I did have to relocate a round reflector that was mounted on the seat post, as the bag covered it. I moved it farther down, on the vertical frame member itself that the seat post slides into, where it is just as visible as before.

This bag is very well made with high quality, durable materials. Some of the features it has that I really like include:

- The expandability of the bag. Normally, when riding, I leave it unexpanded & there is enough room for a spare inner tube, an air pressure gauge, a small vinyl zippered pouch with Allen wrenches & tire tools, cell phone & my car keys - even my wallet can be wedged in as well, but I usually just carry my ID in case of emergency. But, it is nice to know that if and when I need the extra space, I can expand the bag 45% with a quick zip. And, when unexpanded, there is not any bunched up material visible inside, getting in the way of putting in & removing items.

- Inside the bag are two handy features - a small clip on a strap for car keys, and a mesh pocket on the inside of the bag's "door" if you will. The latter is a great place for holding ID, emergency contact info, etc., as they are very visible when you open the bag.
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