https://www.amazon.co.uk/dp/B017IN0V0K/ref=pe_3187911_185740111_TE_item @Speicher . Used the bag for the first time today, fitted without problems, I had to move my computer. The only thing I noticed was the bottom strap isn't long enough for my bike, it's supposed to go round the head tube but my cables get in the way, I'd have to seriously rearrange my brake cables to make it fit. For this ride the strap was loosely wrapped around my cables. It took my phone, glasses and spare tube with a little bit of room to spare. On the road I didn't particularly notice it, it was jiggling around a little bit on the rough surfaces, but not enough to worry about.