Just purchased an inexpensive fixie from bikesdirect (Mercier Kilo WT TT--http://bikesdirect.com/products/mercier/kilott_wt_xiii.htm). The bike comes with Alex Rims' G6000s (700C, 622X17, 620g, ERD: 582). The website says the bike rim can handle up to 45x700c/ 1.75"x29" tires.
I'm looking for the fattest, knobbiest tire possible that would fit these rims. However, I'm having a terrible time finding 29er tires that are narrow enough or cyclocross tires that are fat enough. The 'best I've found are 700cx35s (Kenda Kross Supreme K194 Wire Bead Tire).
Does anyone have suggestions for a very fat and very knobby tire that would fit these rims, IOW, tires in the 700cx45 and/or 29 x 1.75 range?
Thanks in advance