Big Brake Kit
XYZ Racing Hollow Rear Brake Kit — Mercedes Benz B CLASS W247 (Rr Twist-beam Suspension) (2019-2026)
SKU: XYZ-BRK-BKR-ME-88-A-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 B CLASS W247 (Rr Twist-beam Suspension) (2019-2026)
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Caliper render for this kit:
The W247 B-Class carries most of its mass over the nose, and on the twist-beam rear cars the back axle is asked to do comparatively little when you brake. That is fine for a gentle commute. Add a full load of passengers and luggage, or lean on the car down a long alpine descent, and the standard rear discs run short of thermal headroom while the fronts are still working hard.
This XYZ Racing Hollow Rear Brake Kit for the 2019-2026 Mercedes Benz B Class W247 tackles that imbalance at the source. Supplied as a matched pair of rear calipers and discs, it adds rotor capacity and a more consistent clamp at the rear, pulling braking balance back towards the middle of the car so the front axle is not left to manage everything on repeated stops.
What this brake kit does for your 2019-2026 Mercedes Benz B Class W247 (Rr Twist-beam Suspension)
The first thing you notice is pedal consistency. With more rear rotor mass to soak up and shed heat, the kit holds a firmer, more repeatable pedal through a sequence of hard stops rather than going long as the rear fades. The hollow-vane disc design trims rotational and unsprung mass at the back axle, which a twist-beam rear feels directly in how settled it stays under braking. Three pad compounds let you match the car to its use: Street for quiet, low-dust everyday running, Sport for spirited road work and the odd track day, and Racing for the hardest sessions. Caliper finishes in Red, Yellow, Gold, Black or Anodized Black at no extra cost mean the upgrade reads clearly through the rear alloys.
About the Hollow Rear Brake Kit
The kit centres on two-piece floating discs with a hollow-vane construction, which remove material where it does least work to cut weight without giving up swept area or heat capacity. Paired with a fixed caliper, hollow-body as standard, and a choice of compound, the assembly is built to keep pad and fluid temperatures in a workable window during sustained use; a Hollow Racing caliper upgrade rated to 1000C with a two-year warranty is offered for cars that see real track time. The three-tier pad range of Street, Sport and Racing covers the spread from quiet daily driving to circuit abuse. Included finishes run Red, Yellow, Gold, Black and Anodized Black, with a Custom Color in any Pantone for £150 and premium polished-forged Titanium, Polished Gold and Polished Silver options alongside candy Teal, Blue, Red and Orange. Discs are drilled or slotted at the same price, with two-tone centre bells in five anodized colours or titanium available at checkout. Everything is specified for the rear of the W247, so the geometry and mounting suit the twist-beam axle rather than being a generic fit.
Fitment for the Mercedes Benz B Class W247 (2019-2026)
This kit is designed for the W247-generation Mercedes Benz B Class built from 2019 to 2026, specifically the variants running the rear twist-beam suspension. Confirm your car uses the twist-beam rear axle rather than the multi-link setup before ordering, as the two require different rear hardware.
What buyers also search for
- Mercedes B Class W247 rear big brake kit for loaded and fast-road driving
- W247 twist-beam rear brake upgrade to rebalance front-biased braking
- B Class W247 hollow-vane disc rear kit to reduce unsprung mass
- Mercedes B Class rear brake pad compound options: Street, Sport and Racing
- W247 brake caliper colour choices to suit the rear wheels
Choose your pad compound, caliper finish and disc style using the options above to configure your kit.
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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More XYZ products for the Mercedes Benz B CLASS W247 (Rr Twist-beam Suspension) appear here as the rest of the range publishes.