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Union 34 Stripe Rucksack Seatpost Bag


Union 34 Stripe Rucksack Seatpost Bag is a bag that looks smart and thinks smart: Union 34 designed the U34’s Stripe Rucksack to take the weight off your shoulders while you’re riding, and look great on them when…

Union 34 Stripe Rucksack Seatpost Bag


Union 34 Stripe Rucksack Seatpost Bag is a bag that looks smart and thinks smart: Union 34 designed the U34’s Stripe Rucksack to take the weight off your shoulders while you’re riding, and look great on them when you’re not. This 30 litre capacity bike backpack has a hidden plastic fitting in its back, which enables it to slot securely to the seatpost fixing system and stay there – even over rough or bumpy terrain. Off the bike, this urban rucksack not only looks professional and compact, but can be carried in comfort, thanks to the ample padding around the shoulders and back and the airflow around the spine for maximum support and comfort. Inside, there are dedicated spaces for clothing, a bike kit, a laptop and more. A clever design for your working day.


Beyond the bike. The beauty of this urban backpack is that it looks just as at home on your shoulders as it does on your seatpost. Plus, with its quick-release mechanism, the bike rucksack can be attached and removed in one quick, easy motion – even while wearing gloves. Perfect for the urban cyclist who wants to look good without being slowed down.



100% 600-denier polyester

Fabric Properties:

Tough 600dn water resistant fabric

Cargo Capacity:

30 Litres


Easy to attach and remove from Seatpost Fixing System (Sold separately), vertical mount only


32cm (W) x 43cm (L) x 7cm (D)

Helmet Holder?:

External helmet holder

Shoulder Straps:

Ergonomic padded shoulder straps with adjustable sternum support

Pocket 1:

Expandable main compartment with documents and stationery holder

Pocket 2:

Front compartment for clothes and shoes

Pocket 3:

Pockets for cycling tools

Pocket 4:

Padded D-lock holder

Pocket 5:

External stretch pockets for water bottles and pumps etc

Laptop Sleeve?:

Removable padded case for laptops up to 15.6" laptop case


Reflective trims back and front, reflective straps for clip-on lights

Rain Cover:

Removable rain cover with reflective print

Extra Features:

Comfortable rubber carry handle, 2-year warranty




Not machine washable

Buying Guides

Hydration Packs & Backpacks

Hydration Packs & Backpacks

A buying guide that offers general advice on hydration packs and backpacks

Customer Reviews

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We offer a range of delivery services for our UK and International customers. UK Customers can select our FREE standard delivery option on most non bike orders over £20. Or if you’re in a hurry you can upgrade to our Next Day, Saturday or Sunday delivery services. You can also use our free Click & Collect service, where you can collect your purchases from a choice of over 50 Evans Cycles stores. International customers can benefit from FREE delivery on most orders and save UK VAT if we are shipping outside of the EU.

Bike build & delivery

UK bike delivery charge includes assembly by our fully trained mechanics, pre-delivery inspection and safety check, packing in our custom bike box, multi-tool and delivery from only £9.99 per bike.Click here to see how we deliver your bike

Standard, Next Day, Saturday & Sunday UK delivery

We offer a FREE standard delivery service on orders over £20, as well as Next Day, Saturday & Sunday delivery options to UK addresses. Click here for more details

Click & Collect

Using our Click & Collect service your order will be delivered to a choice of over 50 Evans Cycles stores nationwide for collection. This service is FREE of charge for all orders. To check store stock and collection times, use the "Check store stock" button above. Click here for more details

International delivery (Incl BFPO, ROI, Channel Island & Isle of Man)

We offer a FREE delivery service on most International orders. Orders delivered outside the EU are exempt from VAT. To calculate the charges for your order simply add products to your basket and proceed through the checkout process, where you will need to enter your delivery details. Our website will present you with the relevant delivery options and the charges for your basket of goods. Click here for more details.

Easy Returns

Our priority is to ensure that you are highly satisfied with your purchase. In the unlikely event that you are not, please feel free to return your goods within 90 days of the purchase date for a full exchange or refund. Returns can be made in your local store or sent back to our distribution centre.

Click here for more information


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