Functional bikes. Not Porn not Anti

Fatbirds are great by the way - I brought my Yukon from there and they were nothing but helpful.

Try and pop up there to see them if you can.

This^

Then ask for a rim upgrade. I'd go with some 29er XC rims. You dont need the braking surface of a road rim, and a 24mm width will improve your tyres in terms of grip, comfort, and rolling.

http://www.fatbirds.co.uk/683/products/dt-swiss-x-470-mtb-sleeve-jointed-29er-disc-rim-32-hole-presta-drilled-black.aspx