How do you make an ultralight bag? That was the first question when the Concours de Machines announced that the weight of the bikes included the bag.
Peter Weigle worked very hard to get his fully equipped bike down to just 20.0 lb (9.07 kg), and we wanted to make sure the bag was also as light as possible.
Gilles Berthoud bags already are among the lightest bags available today. Even so, we knew savings were possible without compromising its size or performance. The result is on the left in the photo above, with the standard bag on the right for comparison.
Together with our friends at Gilles Berthoud, we decided to use the same canvas fabric and leather as on the standard bags: Thinner materials wouldn’t last as long.
The first step was to remove the outside pockets. We gave up a little capacity and convenience, but gained significant weight savings. Next, our friends at Gilles Berthoud reduced the leather reinforcements to an absolute minimum.
They examined every part of the bag to see where weight could be saved. Above are studies for the attachment to the rack backstop. In the end, they replaced the strap with a short sleeve that slips over the rack backstop and also anchors the hook for the closure. It’s by far the lightest and simplest solution.
We thought about eliminating the map pocket, but I felt that it was essential. The goal with this project wasn’t to create the lightest bike at all cost, but a no-compromise machine that will be ridden hard for many years. How about reverting to the older style of map pocket that is open on the side, rather than using a Velcro closure? That is a small compromise, and it saves valuable grams. There are a few other weight-saving details, but we also added a little piece of leather with the Gilles Bethoud logo to the front of the bag. It may weigh 3 grams, but those who created this amazing bag deserve credit.
The result? The entire bag weighs just 266 g. That is less than half the weight of the standard bag (which is already very light). And this is the GB28 – the largest size – which holds a whopping 13 liters. I can’t think of any other adventure-sized handlebar bag that comes close to being this light.
The bag has lived up to its promise. I’ve used it quite a bit in all kinds of weather – that is why it no longer looks brand-new in the studio photos. Since the fabric and leather are the same as the standard bags, it should last as long. (My very first Berthoud bag, which I bought in 2000, is still going strong.)
And it’s as waterproof as the standard bags – the cotton fabric swells when it gets wet, and even after hours in the rain, there is no water inside. (I place my notebook and other moisture-sensitive items in a Ziploc bag as a precaution.)
There is one other modification we made compared to the standard bags: Since there is so little leather, the ultralight bag is less stiff than the standard model. So we made a very lightweight aluminum stiffener that attaches to the decaleur and to the small inner flaps with Velcro. (The large flaps keep the contents in the bag on really rough terrain, so we kept them, too. The flaps also allow you to overstuff the bag, which is useful during long events. Plus they keep out the rain.)
Does a superlight handlebar bag make sense when its contents will weigh more than the bag? Like the trunk of my car, my handlebar bag rarely is filled to the brim. It just gives me options. I can start a ride before sunrise, dressed for chilly temperatures, and then shed layers as it warms up. I can bring a camera and take photos when the mood strikes. I can even swing by the farmers’ market on the way home and pick up some fresh vegetables for lunch. A superlight bag makes sense in the context of a fully equipped bike that offers the performance of a racing bike with the versatility of fenders and lights.
In addition, I want a bag like this for long-distance events like Paris-Brest-Paris or the Raid Pyreneen, where I count every gram before the start. I plan my stops carefully, and I carry enough supplies to limit my off-the-bike time to the absolute minimum. A superlight bag is among the easier ways to save weight on my bike. (For cyclotouring where a few minutes make no difference, I definitely recommend the standard bags.)
We are now offering the ultralight Concours de Machines bag in a limited, one-time production run. It will be available in three sizes, and it will incorporate a few small changes based on what we’ve learned from the prototype. It will include the stiffener that is designed to attach to a decaleur. The rear sleeve fits on a rack with a backstop no wider than 48 mm – perfect for our Compass/Rene Herse racks.
If you would like one of these bags, please pre-order by January 15. The bags will be delivered in March, so you can use it in this year’s 1200 km Paris-Brest-Paris.
- Pre-orders will close on January 15 at midnight, Pacific Time.
- Bag includes aluminum stiffener.
- Available in three sizes: GB22, GB25 and GB28, with gray fabric
- Bags will be delivered in March.
- Click here to pre-order ultra-light bag.
- Peter Weigle’s ultralight bike for the Concours de Machines
- Click here for more information about all Gilles Berthoud bags.