
XYZ Racing Hollow Rear Brake Kit — Mercedes Benz GLB 250 X247 (2019-2026)
SKU: XYZ-BRK-BKR-ME-88-F-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø330–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Mercedes Benz GLB 250 X247 (2019-2026)
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Caliper render for this kit:

Tall, square-shouldered and built on Mercedes’ MFA2 front-drive architecture, the GLB 250 X247 asks more of its rear axle than its lower, lighter hatchback relatives ever did. Load it across all three rows, hook up a trailer, or lean on it down a long alpine descent and the standard rear brakes are the first components to soak up heat they were never really sized to enjoy. The XYZ Racing Rear Big Brake Kit for the Mercedes Benz GLB 250 X247 (2019-2026) exists to close that thermal gap.
This is a rear-axle upgrade built around brake balance and stamina rather than a chase for headline stopping numbers. Supplied as a matched pair of rear calipers and rear discs, it lets a choice of Street, Sport or Racing pad compounds set the back of the car to how it is actually used: school run and motorway commute one week, a fully loaded family trip or a brisk cross-country run the next.
What this brake kit does for your 2019-2026 Mercedes Benz GLB 250 X247
On a nose-heavy compact SUV like the GLB, the rear brakes usually play a supporting role, which is precisely why upgrading them sharpens the car in ways you feel rather than read about. A more thermally capable rear axle resists fade when you string several hard stops together, so the pedal stays consistent on a long downhill or a spirited drive. The three pad compounds let you bias the setup: Street for quiet, low-dust daily running; Sport for firmer bite and a wider heat range on fast-road use; Racing for the highest-temperature track work. Stronger, more predictable rear retardation also settles the body under trail braking into a corner, trimming the rearward squat and helping the GLB turn in with more composure than its ride height suggests. Front-and-rear balance, in other words, becomes something you can rely on once the standard rears would have started to wilt.
About the rear big brake kit
XYZ Racing build this as a complete rear big brake kit rather than a pad-and-fluid tweak, replacing the standard rear setup as a matched pair of calipers and two-piece floating discs. Lightening the disc reduces unsprung and rotating mass at the rear axle, which helps the dampers control the wheel over broken British surfaces and takes a small load off the drivetrain; the ring can be drilled or slotted at the same price. Pad compound is where you set the character: Street keeps things civil and clean-wheeled, Sport trades a little dust for stronger bite and heat range, and Racing is there for owners who genuinely reach trackday temperatures. The caliper is hollow-bodied as standard, with an optional Hollow Racing upgrade (no dust cover, rated to 1000C, two-year warranty) for hard track use. Painted caliper colours, Red, Yellow, Gold, Black and Anodized Black, are included at no cost; a Custom Color in any Pantone is GBP 150, and premium polished-forged finishes (Titanium, Polished Gold, Polished Silver), candy finishes (Candy Teal, Candy Blue, Candy Red, Candy Orange) and two-tone or titanium centre bells are all available. It is a vehicle-specific fitment, matched to the X247 rear axle rather than adapted from a one-size bracket.
Fitment for the Mercedes Benz GLB 250 X247 (2019-2026)
This kit is listed for the Mercedes Benz GLB 250 in X247 chassis form, covering the 2019 to 2026 model years, and fits the rear axle specifically. Confirm your car is a GLB 250 X247 within that span before ordering, then choose pad compound and caliper colour to suit how it is driven.
What buyers also search for
- Mercedes Benz GLB 250 X247 rear brake upgrade for loaded family and towing use
- GLB 250 X247 big brake kit with Street, Sport or Racing pad compound choices
- X247 rear brake kit that improves brake balance on a nose-heavy compact SUV
- Mercedes GLB 250 caliper colour options: Red, Yellow, Gold, Black or Custom
- Rear brake kit for the 2019-2026 GLB 250 that holds up on long descents
Pick your pad compound and caliper colour for the GLB 250 X247 and configure your rear brake kit using the options above.
What’s in the kit
Rear axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 330–421 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 6 / 8-pot
- 2×High-stiffness mounting brackets
- 2×Braided stainless steel brake lines
- 4×High-performance brake pads (1 set)
- 1×Fitting hardware & tools pack
Parking brake: Electronic parking brake (EPB) compatible.
Choosing your spec
Every kit is built to order around the choices you make above. Here is what each option actually changes, so you can spec yours with confidence.
Brake pads — Street, Sport or Racing
Every kit ships with a full set of high-performance pads; the compound is your call.
Street is the right default for fast-road driving — a strong, progressive cold bite with low noise, low dust and long disc life. Sport raises the working temperature and adds bite and fade resistance for hard road use and the occasional track day, while still behaving on a cold morning. Racing is a track compound built for sustained abuse: huge fade resistance and bite once heat is in it, at the cost of more noise and dust when cold. Match the pad to how hard you actually use the brakes — there is no benefit to a race pad that never gets up to temperature.
Caliper grade — Hollow vs Hollow Racing
Hollow is the standard caliper on every kit: a hollow-body forged caliper, lighter than a solid one, fitted with a dust cover and backed by a 5-year oil-leak warranty. For most fast-road and spirited track use it is all the caliper you need.
Hollow Racing is the track-grade upgrade. It runs the same hollow body but without a dust cover (so there is nothing to melt at sustained high temperature), uses a twin-metal piston that isolates heat travelling from the disc to the oil seal, and is rated to 1000°C. Available 330–356mm (rear). Warranty is 2 years on oil leaks and 10 years on appearance. Built for professional racing and repeated track days.

Caliper colour & finish
Painted colours (Red, Yellow, Gold, Black, Anodized Black) are included at no cost. Want an exact match to your car? Custom Color (+£150) paints the calipers to any Pantone code you supply (15–20 day lead time).
Polished Forged finishes are the flagship: a forged caliper given a mirror-polished surface treatment that shifts colour with the viewing angle. Beyond the looks, the polished surface dissipates heat better, resists rust and stands up to the weather. Choose Titanium (neochrome, +£350), Polished Gold (+£300) or Polished Silver (+£250). They look their best paired with a titanium centre bell. Care: clean only with a dilute neutral cleaner or water.
Candy colours (+£200) use a deep candy-paint and polishing process for a mirror-reflection, boutique finish — pick Teal, Blue, Red or Orange (shown below right).


Centre bells
The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. The standard anodized centre bell is included. The Two-tone bell (+£200) adds an anodized accent ring — choose Red, Yellow, Orange, Purple or Silver right here at checkout. The Titanium centre bell (+£500) is a forged titanium bell (bolts not included) that finishes off the polished-forged look.

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