Despite the effectiveness of narrow/wide rings and clutch derailleurs, chain losses are still possible – so many enduro racers and aggressive riders use a lightweight top guide to keep their chain on track. At just 55g (ISCG-05), this beauty from Gamut promises the required security for a relatively small weight penalty.
Setup on our Focus SAM test rig was fairly straightforward, with the slider allowing enough horizontal room to access the full gear range but a little back-and-forth being required to prevent the chain fouling at extremes of the 160mm of travel (this is more likely to be a problem with more rear travel).
On the trail, the polyurethane slider with its rubberised sleeves deadens any chainslap noise and quietly gets on with its job. We’ve had no dropped chains or fouling issues on rough and rocky rides, even at the extremes of the cassette. Adjustable to fit 30 to 40t chainrings, the SXC is definitely a chain device worth considering if you want a bit of extra security and don’t need a bashguard.