Ortlieb Trunk-Bag RC

Ortlieb has taken another step forward in developing its classic Trunk Bag, replacing the chunky zip with a roll closure and removing the outer zippered pockets, while keeping the top rate Rack Lock Adapter system. The result is a no-frills, easy-to-use, easy-to-access, durable, 100 per cent waterproof bag. All of this does come at quite a price, though.

Roll open the top of the bag to immediately access the generous 12 litre capacity. There are no interior partitions or fancy side compartments that might restrict packing or take up valuable space, just open space to throw in as much kit as you can. Trust me, you can pack it in up to the recommended maximum of 10kg.

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There is a single flat zip pouch that is just big enough for a wallet, phone, keys and coins, and is removable. The simplicity will likely appeal to commuters and shoppers (rather than tourers), who can make full use of the space available, so doing away with panniers. It would also be great for a ride leader wanting to be prepared with spares, tools, maps, extra clothing and food for groups.

The roll closure relies on a stiff, flat plastic strip, and the ends of the bag invert inwards and are rolled up too. Once rolled down, a flap simply lifts across and the horizontal strip of Velcro on it attaches to two vertical Velcro strips on the other side of the bag; this allows for a small amount of adjustment depending on how full the bag is.

Ortlieb stresses that the bag's closure must be rolled 'at least 3-4 times' in order to protect kit from splash water, but I found rolling it just three times was sufficient to keep everything dry in consistently heavy rain. Water just rolls straight off, and the exterior dries almost instantaneously when brought in out of the rain.

The bag holds its rigid box shape thanks to stiff plastic inserts which cannot be removed – it's not possible to compress the bag even when there is not much in it. The shoulder strap should be removed to use the roll closure (Ortlieb's recommendation) but it does function reasonably well even if you don't. That said, it definitely needs removing in rainy weather to ensure the closure is watertight.

The handle formed by the roll closure is great for removing the bag from the rack – it's more of a grip mechanism than a handle; your fingers do not come out of the other side, they just curl up under the roll. The detachable shoulder strap is a must if you are carrying the bag any distance.

Attaching & removing

Although the instructions for setting up the Rack Lock Adapter looked pretty scary, it was actually very quick and easy. The system is compatible with any make of rack, provided the rack bars for mounting it run parallel. The adapter, attached to the base of the bag, is adjusted to fit the rack using a slider that is secured in place once the correct width has been set up. And that really is it. The bag is attached with a firm push to engage the adapter's four clips with the rack rails.

It's removed by inserting a small plastic 'key' into the side of the adapter. This key can remain securely in its slot when the bag is both on and off the rack – ideal to avoid losing it. The Rack Lock Adapter is absolutely solid – no movement, rattling or sliding about.

I found that the Trunk Bag worked best without other rack baggage – it didn't want to go on the rack while my Ortlieb panniers were attached, though it did fit on with some very basic panniers with low profile clips attaching them to the rails.

> Beginner's guide to carrying stuff on your bike

In terms of safety, Ortlieb has added one of its super-effective reflective patches and a rear light mount. The latter is a bit limited, though – you need a rear light with a clip in order to use the mount. This was the only negative thing about the bag; the only other option for a light is on the rack itself, as the seatpost is covered by the bag. Naturally, none of this is an issue if you are only intending to use it during daylight hours.

Ortlieb has taken a minimalistic approach with this product; if you like a multitude of pockets or compartments then this is not for you. Which might leave you wondering exactly what it is you are paying for. It is a steep price, even when you take into account that it is a front runner on ease of use, durability and waterproof ratings. Price aside, there is no denying that it is a great accessory for lightweight commuters and shoppers. It is unlikely to be a choice for many tourers because of its rigid form, but it might equally appeal to those enjoying long day outings wanting to take ample supplies with them.

Verdict

Ample storage that's on and off in a flash, durable and 100% waterproof, but pricey in comparison to alternatives