i use one of these on mine - https://www.lomo.co.uk/products/15l-dry-bike-motorbike-tail-bag/
it's a really versatile bag, and it comes with velcro straps that i've attached to the pizza rack on my kepler which do quite a good job of holding it down, although i also wrap the clips under the rack for extra security.
i'll take a couple of pics later if you like?
That bag looks spot on. Some photos would be great - thanks.
@2slices started
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i use one of these on mine - https://www.lomo.co.uk/products/15l-dry-bike-motorbike-tail-bag/
it's a really versatile bag, and it comes with velcro straps that i've attached to the pizza rack on my kepler which do quite a good job of holding it down, although i also wrap the clips under the rack for extra security.
i'll take a couple of pics later if you like?