-
All the straps.
Even the KTM bag needed extra straps. I say needed.... I think I needed them more than the bag did, to know it couldn't go anywhere.
You can buy narrow sticky-backed velcro from the haberdashery lady in E&C shopping centre I think. Minimum three points to hold the bag to the bike, but ideally four - two on the seat rails and two on the seat post, then it's tight and distributed.
I think I had about 5 straps, but the KTM is less malleable, nylon or something.
Help needed...
I bought Alpkit's tapered dry bag because i thought this would be the cheapest way to carry some extra luggage on my road bike.
https://www.alpkit.com/products/airlok-xtra-tapered
On the website they say you can attach it under the seat using the straps provided. I realise this isn't going to be as study as a proper system like the Koala, Apidura or a holster/bag kit, but i can't get it to work at all.
Within 2 minutes of cycling the bag swings away from the seat post and bounces around on my rear wheel. It's missing the dedicated seat post velcro, instead relying on a strap under the seat and one round the seatpost.
I think i'm just going to have to splash out on a holster, but has anyone had any luck getting one of these to work on it's own?