SHIMANO DEORE and SHIMANO SLX have many technologies in common which have trickled down from their big siblings: SHIMANO XTR and SHIMANO DEORE XT.
Both SHIMANO SLX and SHIMANO DEORE are available with either one or two chainrings. Both are built to last and provide the highest level of safety with, for instance, strong performing four-piston disc brakes.
The cockpit has two shift levers with the SHIMANO 2-WAY RELEASE system, which allows gear shifts either by thumb action or by pulling with the index finger. Thanks to the RAPIDFIRE PLUS technology, you can change up to three gears at a time. However, the DEORE two-way shifters only allow you to shift up and down with RAPIDFIRE MONO technology, using only one lever.
At the other end of the bike, the rear derailleur stabilizes the chain using SHADOW RD+ technology, which prevents the chain from banging against the chainstay and from falling off the chainring.
As a result, the chain runs reliably and quietly. SHIMANO’s HYPERGLIDE+ system, which comes mounted on both SHIMANO SLX and SHIMANO DEORE, ensures fast and smooth shifting, even on extremely rough surfaces.
If you prefer two chainrings in the front for more gears and smaller jumps between gears, you can use slightly smaller rear sprockets. Mountain goats might prefer a SHIMANO DEORE 10-speed cassette or SHIMANO SLX with two chainrings, which offer a slightly higher gear reduction compared to one chainring, making it a little easier to pedal uphill. In contrast, with SHIMANO DEORE 11-speed, gear reduction is slightly higher thanks to the large 51T rear sprocket in the single chainring version.