- bike carrier: tubus (logo expedition) on bike-components.de
- Ortlieb bike bags (Bike Back Roller plus, 20L): outdoorworks.de
Those German websites are reliable, have been used by hundreds of cyclists and hard to beat pricewise...
- clothes: Décathlon Quechua (very good and cheap brand but don't be surprised if those are made by kids in China or Pakistan).
Le Vieux Campeur (V.C) are quite expensive compared to online shops, but you can have a 20% discount if you know someone from l'Ecole des Ponts et Chaussées, or if the company agrees to help you with your expedition (you then have to submit your project).
- sleeping bag: for -15°C, the Alta from Helsport is one of the best synthetic sleeping bags for quality-price (125 euros). OK, it is a bit heavy and large, but it is still worth it (V.C)
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- tent: Tadpole 23 from The North Face, good 2.5kg three seasons tent that has proven worthy in Norway, photo (V.C)