Shimano Deore XT BRM8120 4 pot DISC BRAKE LH REAR BEST UK PRICE RRP £199.99
This listing is for a Shimano M8120 4 pot BRAKE SET - LEFT HAND/REAR, brand new. INCLUDES: M8120 caliper and pads, RH M8100 lever, REAR length hose. Brake Mount adaptor and disc rotor not included - see our other listings if required. Best UK price and service. Genuine Shimano OEM stock as is supplied with a new bike build.
If you have seen a better deal, make us an offer and we will beat it! The Shimano Deore XT M8120 caliper features consistent braking performance and reliable stopping power in all conditions. The 4-piston caliper instills greater downhill confidence and control. The fade, which can occur to disc brake rotor and pad when braking on a long downhill ride for instance, has a negative impact on the braking performance. Shimano has adopted Ice Technologies disc brake rotor and Ice Technologies pad to realize the cooling technology for consistent performance.
The clad disc brake rotor blade, which has a 3 layer-sandwich structure of stainless steel, aluminum and stainless steel, provides better radiation performance. Also, the radiation fin has been adopted for the pad. Moreover, the clad disc brake rotor blade and the radiator fin provide long pad life, less noise, less fade and lightweight. Ice Technologies piston in order to achieve optimized lightweight, high rigidity and heat dissipation.Oversized pistons transfer hydraulic power directly to the brake pad, and ceramic material is used to avoid heat transfer for constant stable braking, providing efficient stopping power transfer without loss. Disc brake system with the dual diameter opposed-piston caliper design has differently sized pistons in front and in the rear.
The system adopts a power transfer system in which the disc brake rotor is pressed by the smaller sized piston at the entrance of the disc brake rotor intake and also by the more powerful larger sized piston at the back. This prevents the wobbling motion of the disc brake rotor and reduces noises significantly. The 4-piston caliper also allows a wider contact area for the disc brake rotor while keeping the size compact, and the efficient location of pads is adjusted as necessary to stabilize the pressure. In combination use with the Servowave lever it provides an incredible 50% more stopping power than the previous model. The advanced Saint / Zee disc brake system, which adjusts to accommodate the different braking styles of different riders, offers stable braking power and excellent modulation.
High performance hydraulic disc brake for efficient braking in all conditions. Front or rear wheel use for International Standard or Post mount with adapters (not included). 4 oversized phenolic pistons optimized for heat insulation, lightweight and stiffness.
Opposed 4-piston design reduces leading effect and optimal pad wear increases braking control. Increased pad to rotor clearance reduces the chance of rotor drag in muddy conditions.Forged caliper design is lightweight and rigid. One way internal fluid circuit makes bleeding easy. Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid.
Shim-less mounting bracket allows for quick installation and setting up. Recommended for use with Ice Tech Center Lock rotors for optimum braking performance.Comes with N03A resin pads with fins. Can be used with Ice Tech pads available in resin or sintered compound, the optional aluminum radiation fin pad further improves heat dissipation reducing brake surface temperature by 50 deg C. AS REVIEWED BY BIKE RADAR..
Shimano XT is the workhorse of the Japanese brand's drivetrain and brake families, combining virtually every feature of its range-topping XTR SERIES, but at a lower price point. When it comes to its four-piston brakes, does this reduced cost impact on performance? Shimano's customary lever shape is featured on these XT brakes.
It's relatively short with a prominent upturn at the end to keep your fingers locked on. This nubbin at the end has a slight texture, too. Being the trail version rather than the lighter-weight race iteration of the brake, the lever has both tool-free reach adjustment and a free-stroke (or bite-point) adjustment via a crosshead screw.The lever pushes the master cylinder via Shimano's Servowave cam, which pushes the brake pistons further during the early lever stroke than it does later in the lever stroke. This gets the pads hitting the rotor quicker, allowing better clearance, and then adds to the brake's modulation later on. The levers attach to the bar via a split clamp. To open the clamp requires the insertion of a narrow pin into a lock. I'm not sure why this feature really exists and it adds little benefit, making lever removal more of a hassle than other brakes.
The clamp can be mated to Shimano's own shifters easily, and there are options out there for various dropper levers and SRAM shifters. The clamp is situated mid-way along the lever body, but Shimano adds a brace right at the end of the body that sits against the bar, in order to prevent lever-body flex.
However, it can interfere with shifters or dropper levers if you're not running them with the integrated mounts. This means they can be routed easily through frames when building a bike, before you attach them to the pre-plugged and filled lever with an 8mm spanner. In practice, I've found this very easy, and have not had to re-bleed the brakes once I've done this.Occasionally, though, after cutting hoses, I've needed to re-bleed the brakes. At the two-piece caliper, four phenolic pistons push onto a long, sintered brake pad. The backing plate includes heat-dispersing fins to aid temperature management and the hose leaves the caliper via a banjoed connector, enabling the hose exit angle to be adjusted to aid rear-triangle hose routing. The sintered pads bedded in surprisingly quickly; I was pulling stoppies within a couple of runs, much faster than I'd expected.
The power on offer is clearly up to the task, too, with the brakes bringing me to a stop on steep terrain on a heavy e-MTB. Shimano has a reputation for very digital-feeling brakes, and the initial bite of the XTs is punchy, with a lot of power delivered early in the lever's stroke. However, I don't find it unmanageable at all.
On technical terrain, I like knowing there's a lot of usable power, easily accessible without having to pull the brake lever a long way through its rotor contact stroke. In this regard, it's similar to the SRAM Code R I've also tested. However, the Code R perhaps has a little more punchiness at the end of the lever's stroke. The XTs seem to build their power in a slightly more linear fashion. Overall, the lever feel is firm with little mushiness, certainly compared to brakes from Magura, for example.
During its power phase, lever travel is fairly short, but it remains light and smooth throughout. The lever ergonomics suit me and there's a good range of reach adjustment. However, the free-stroke adjustment on my brakes was less impactful than I've experienced elsewhere. Still, I have never found it difficult to get the brakes set up to my preference. On long descents, the finned pads seem to help with heat management, however I've found they rattle due to the extra weight of the fins.I have also experienced noise from the rear brake, especially when the weight of the fins overcomes the pad's ability to hold the pad away from the rotor, and the pad then reverberates. Bleeding the brakes as per the instructions that come in the box can be a little confusing; online guides seem to be better written. Getting a decent bleed is moderately easy using Shimano's bleed pot, however there are systems out there with easier, more reliable bleed processes.
I'm happy to report that on my test brakes, as well as numerous other XT brakes on test bikes, I've not had a wandering brake point for a while now. With an excellent lever feel, in part thanks to a light stroke, positive bite and non-flexing lever body, combined with ample stopping power, the XT remains a benchmark brake. It's not without fault, because bleeding could be easier and it's not the quietest. However, I would never complain at seeing an XT four-piston brake on any test bike, and I would happily recommend the M8120.
PRODUCT SPECIFICATIONS - CALIPER (LEVER BELOW). ICE TECHNOLOGIES pad compatible caliper. Shift lever rotation angle adjust range I-SPEC EV ; deg.