I've now added the Schwalbe Marathon Plus tyres and a Bontrager Interchange Seatpost rack. I hope to get the following bag for the rack below; the Trek Interchange rear deluxe plus. What I love about this back is it slides on and fixes the rack and the outer side pockets contain fold out panniers. Folding bag for a folding bike! I've already cycled 20 miles along the canal towpaths into London yesterday and the bike handled all terrain with great aplomb! The Schwalbe Marathon plus tyres also roll lovely on normal roads, I'm very impressed with them. The Shimano Deore gears are shifting beautifully now. I have to say the bike rides close to a Birdy in terms of handling and shifting. The Downtube FS frame is such a great one to work with and upgrade.