XYZ Racing Hollow Rear Brake Kit — Mercedes Benz GLA X156 (2014-2020)

The GLA X156 sits higher than the A-Class hatch it shares its MFA underpinnings with, and that extra ride height puts more load onto the rear axle every time the car pitches forward under braking. The XYZ Racing Rear Big Brake Kit for the Mercedes Benz GLA X156 (2014-2020) targets that rear end directly, adding the thermal capacity the factory rear setup runs out of when you brake hard and often.

This is a rear-axle upgrade aimed at owners who push the GLA on fast-road runs and the occasional circuit session, where a crossover’s mass and higher centre of gravity ask more of the brakes than the standard discs were sized for. Supplied as a matched pair of rear calipers and rear discs, it keeps the car’s front-and-rear braking balance composed rather than leaving the back lagging behind a front upgrade.

What this brake kit does for your 2014-2020 Mercedes Benz GLA X156

The two-piece floating disc strips rotating and unsprung mass from each rear corner, which sharpens how quickly the wheels respond to steering and braking inputs and eases a little strain off the rear dampers. You pick the pad compound to suit how you drive: Street for quiet, low-dust everyday use, Sport for harder fast-road work and a wider heat range, and Racing for track days when rear brake temperatures climb. The hollow-vane disc sheds heat faster than a solid item, so the rear brakes hold their bite through repeat stops instead of fading. On a tall, front-heavy crossover like the GLA, a stronger rear axle also settles the car under trail braking, giving you confidence to brake later into a turn.

About the rear big brake kit

The kit is built around a lightweight two-piece floating disc that cuts rotating mass while keeping the internal vane structure needed to pull heat out of the braking surface; the ring can be specified drilled or slotted at the same price. It mounts to the rear axle and pairs with a hollow-bodied caliper finished in your choice of no-cost painted colours: Red, Yellow, Gold, Black or Anodized Black. A Custom Color in any Pantone adds GBP 150, and premium polished-forged finishes (Titanium, Polished Gold, Polished Silver) and candy finishes (Candy Teal, Candy Blue, Candy Red, Candy Orange) are available, as are two-tone or titanium centre bells. A Hollow Racing caliper upgrade (no dust cover, rated to 1000C, two-year warranty) is offered for hard track use. Three pad compounds, Street, Sport and Racing, cover the spread from road to circuit, so the same hardware can be set up for a daily-driven GLA or one that sees regular lapping. The focus here is rear-axle thermal stability and weight reduction, because on this platform it is heat management at the back that limits sustained hard braking.

Fitment for the Mercedes Benz GLA X156 (2014-2020)

This kit is built for the rear axle of the X156-generation Mercedes Benz GLA across the full 2014 to 2020 production run. Confirm your chassis code reads X156, then select your pad compound and caliper colour to match your intended use. The fitment data here covers the rear position only.

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Pick your pad compound and caliper colour, then configure your GLA X156 rear kit using the options above.