Tired of slipping seat bag buckles? This design eliminates the biggest problem with conventional seat bags: buckles that continuously slip.

By using a pulley velcro attachment system, directly integrated with a very stiff polyethylene skid plate, we have designed a bombproof, no slip, seat bag attachment system. The velcro strap makes taking the bag on and off straightforward. The strap is fully replaceable. Alongside this, there is a full compression /load control strap running to the back end of the skid plate to provide more load control. this strap uses a ladder lock buckle with a cam stop over the top. They don't slip.

Other features to the V2 bag: The nose section under the seat has been widened for more volume. nylon twill webbing is sewn along the inside opening of the bag to reinforce the roll top buckle webbing. The open is also cut taller so the bag is easier to pack, yet since the wide end is part of the rolled up section you can't over pack the bag.

Instructions are here:

After two years of personal use during the Tour Divide race, I have never had these bags slip.

The seat bags have a sewn in high-density  skid plate sewn in right over the tire. This plate also helps to compress the load as the velcro strap and load control strap run right to it.

Built out of Ultra UHMWPE fabric from Challenge sailcloth, or Xpac fabrics. These fabrics are waterproof to 200 psi. The bottom panel and perimeter panels are Ultra 400 or 800.  My bags are very lightweight, 12-14 oz, depending on the size.

Fitting:

small- you'll need at least 6.5" of space between the seat rail and the closest point on the biggest tire you'll run.

Volume:

small 6-12 liters

regular 81-4 liters

any questions please ask.