KHS bikes have built up an enviable high value reputation in recent years. The new 556 is a lighter, tighter, retuned-shock version of the popular 555, and is one of the few really good full-suspension bikes for under £2,000 that we’ve tested so far this year.
We’ve no complaints about the RockShox Revelation RL Dual Air tapered fork or the triple-ring SRAM transmission which, together with the tough Mavic XM317 wheels, make this bike capable of tackling almost everything on this island. Just make sure you keep the bike the right way up so the otherwise powerful Avid Elixir 5 brakes don’t get air into their lines between rides.
Ride & handling: Versatile and confident-feeling bike
The consistently controlled front fork syncs with the well-proportioned cockpit and slack 67-degree head angle to produce a versatile, conﬁdent-feeling bike. The short stem and laidback (70-degree) seat angle means the front end comes up easily for manuals and wheelie drops, and with tyres switched, the bike is stiff enough up front to drive hard through corners, with the back end ﬂex within acceptable limits.
After we had serious spiking issues with the Monarch shock on the ﬁrst sample, KHS UK went back to RockShox and switched it to a much lower compression damping tune. This makes the bike more ﬂuid and controlled over bigger hits and square-edged bumps, lets it squat into corners more predictably and improves traction on technical climbs. The ﬂoodgate lever still lets you stiffen it up for longer climbs though, so it’s a double-win that will now come as standard on all UK 556s.
Frame: Geometry more relaxed for greater stability at speed
For 2011, KHS have added a tapered head tube and new tubeset to save weight and add stiffness over the 555. The four-bar suspension set-up and rocker linkage are lighter and the geometry is more relaxed for greater stability at speed. There’s still room for a conventional water bottle mount and tyre clearance is reasonable around the asymmetric rear end. Lateral linkage stiffness is bearable rather than brilliant though, and you’ll need to trim the long seatpost slightly in order to drop the seat right down.
Equipment: Well specced for the money
The Dual Air 15mm Maxle bolt-through axle Revelation fork is the best trail fork in its price category and the Monarch rear shock has been speciﬁcally re-tuned for UK riders. The SRAM transmission gives a super wide 30-gear range for grinding up the steepest climbs, the Avid Elixir brakes are potently powerful and the Q2 and Truvativ cockpit is well proportioned. The overall weight is low for this bike’s cost and travel category too. The Mavic 317 rims are old favourites too, but the puncture-prone WTB tyres need to be swapped for something tougher and grippier to let the bike reach its limits.