"Opus has clearly put the Nelson 1 together with the demands of high end freeriders in mind. Up front you'll find a 1.5" head tube that not only increases strength and stiffness but will also let you run any fork of your choice down the road, be that the 1.5" Totem that it comes equipped with or a standard 1.125" steerer, or even the latest crop of tapered steerer tubed forks. Opus's choice to use the larger headtube size also allows the rider to fine tune the bar height or even headtube angle by installing headsets with different stack heights.
Hydro-formed top and down tubes curve to provide great standover room as well as clearance for any fork knobs that may have come in contact with the underside of the frame otherwise. If you do barspins on your FR bike, or are planning to, there is nothing holding you back on the big Opus. Cable routing takes a clean route beneath the downtube, although riders who hang there bikes over the tailgate during shuttle runs my take issue with this choice. The rear end is tied together with a 12x135 mm Maxle system for both stiffness and quick removal.
Suspension on the Nelson is a Virtual Pivot Point affair with two short links joining the front and rear triangles. This system can be found throughout Opus's complete line of mountain bikes and is put to good use on the Nelson, the longest travel bike in their lineup. The Fox DHX 4.0 is not mounted to the front triangle, but instead floats between the upper and lower links. All pivots rotate on sealed bearings for durability."
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