Our Top Recommended Big Brake Upgrade Kits For Your BMW Mini Hatch R56
The R56 was the turbocharged Mini, the one that swapped the old supercharger for a turbo and gave the Cooper S its bonnet scoop. That is background, not the story here. The real thing worth knowing before you spend anything is that the two brands answer the wheel-size question very differently on this car, and the gap between them is not where you would expect it.
Tarox’s own published minimum wheel size does not simply track the disc getting bigger. Their 310mm Sport kit clears a 17 inch wheel; step up to the 318mm, just 8mm more disc, and Tarox’s own figure moves to 18 inch. Meanwhile HiSpec’s 335mm Monster kits, a genuinely bigger disc than either of those Tarox sizes, still only ask for 17 inch. Same job, same axle, different caliper shape, different number. The full R56 range is on the site if you want to see everything we stock for this car.
- Every kit on this page converts the front axle: calipers, two piece discs, brackets and fitting hardware for the R56
- Tarox's 310mm Sport clears 17in; their 318mm, only 8mm bigger, needs 18in. It is the caliper shape that decides the wheel, not the disc
- HiSpec's new 2P kits are listed for the whole R50 to F56 Mini family on one part number; Tarox's kits are cut R56-specific
- Nothing on this page below 335mm needs more than 17 inch, so most of the range works behind wheels the car may already have
- Tarox kits arrive with Corsa pads and braided hoses fitted; HiSpec price those separately
What is on this page
- The two brands
- The number that decides it
- HiSpec 300mm Billet 4: the 16 inch starting point
- Tarox 300mm Sport: the complete kit at 16 inches
- HiSpec 325mm Billet 4: the value pick at 17 inches
- Tarox 310mm and 318mm: where the wheel size jumps
- HiSpec 335mm Monster 4 and Monster 6: the track pick
- If the car is already on 18s
- What is actually in each box
- Every kit compared
- Common questions
- What we would actually fit
Two brands, two ways of building a brake kit
Both companies machine their own calipers from billet aluminium and build each kit for the specific car. The difference comes down to two things: what is in the box, and where the work is done.
Tarox
Made at the Tarox factory in northern Italy. Calipers CNC machined from European billet alloy and hand assembled, each one tested before dispatch. Every disc is heat treated, CNC faced and hand balanced to 0.05mm. Sport kits arrive complete with vehicle-specific braided hoses and Corsa pads already fitted. Full ABS and ESP compatibility stated on every R56 kit.
HiSpec Motorsport
Machined in Dartford from 6082 T6 billet aluminium, calipers and pistons both. Every kit is made to order in up to 28 working days, with the calipers finished in your choice of black, red, blue, gold or silver. Pads and braided hoses are priced separately so you choose the compound for the way the car is used.
One external link worth bookmarking for Tarox: their wheel clearance template is the definitive check for spoke depth once you have the minimum diameter sorted.
The number that decides it: your wheel size
HiSpec publish the wheel size for every kit from their own catalogue, and every figure below matches their own listing text. Tarox do the same, but per kit, not by disc diameter, so each R56 figure below was looked up directly on tarox.co.uk against that exact kit’s SKU, not assumed from the disc size. That is why the table does not read as a straight line from small disc to small wheel: Tarox’s 310mm needs 17 inch, their 318mm needs 18 inch, and HiSpec’s bigger 335mm Monster still only needs 17 inch.
| Kit | Disc | Smallest wheel |
|---|---|---|
| HiSpec 300mm Billet 4 2P | 300 x 22mm | 16 inch |
| Tarox 300mm Sport | 300mm | 16 inch |
| HiSpec 325mm Billet 4 2P | 325 x 26mm | 17 inch |
| Tarox 310mm Sport | 310 x 20mm | 17 inch |
| HiSpec 335mm Monster 4 | 335mm | 17 inch |
| HiSpec 335mm Monster 6 2P | 335mm | 17 inch |
| Tarox 318mm Sport | 318 x 26mm | 18 inch |
| Tarox 340mm Super Sport | 340 x 26mm | 18 inch |
| HiSpec 360mm Monster 4 | 360mm | 18 inch |
| HiSpec 360mm Monster 6 | 360mm | 18 inch |
HiSpec 300mm Billet 4 2P: the 16 inch starting point
If the car is on 16 inch wheels and you want to keep them, this is the pick. The Billet 4 is HiSpec’s most popular caliper: four pistons machined from 6082 T6 billet aluminium with external boots on the seals to keep road grit out. This listing covers the whole R50/R52-53/R55-59 and F56 Mini family on one part number, which is HiSpec’s own doing, not ours: the front hub has stayed the same across four Mini generations.
On a 300mm two piece floating disc it is a proper step over the standard setup and clears a 16 inch wheel. Pads and braided hoses are not in the box, which keeps the price down and lets you pick the compound to suit how the car is actually driven.
- £1,233.29 inc VAT
- Clears 16 inch wheels
- 300 x 22mm two piece floating disc
- Pads and hoses priced separately; five caliper colours
- Made to order in up to 28 working days in Dartford
Tarox 300mm Sport: the complete kit at 16 inches
The entry Tarox for the R56, and the easiest buy on this page if you want the whole job in one delivery. Six piston caliper on a 300mm two piece disc balanced to 0.05mm, Corsa pads already in the calipers and braided hoses in the box. Clears 16 inch wheels, the same as the HiSpec kit above.
It is the direct comparison worth having in your head before you order either: same wheel size, same disc diameter, and the Tarox price already includes what the HiSpec price does not. Once you add pads and hoses to the HiSpec side the gap narrows a lot. More on that further down the page.
- £1,986.49 inc VAT, complete with pads and braided hoses fitted
- Clears 16 inch wheels
- 300mm two piece disc, balanced to 0.05mm
- Six piston billet caliper, hand assembled in Italy
- ABS and ESP compatible, stated by Tarox
HiSpec 325mm Billet 4 2P: the value pick at 17 inches
Once the car is on 17 inch wheels, this is where Garreth’s money goes for most R56s that see normal road use with the odd track day. Same Billet 4 caliper as the 300mm kit, stepped up to a 325mm two piece disc for more leverage and better heat handling.
There is an older 325mm Billet 4 listing still live on the site at a higher price than this one for what is functionally the same caliper and disc combination. We use the current HISC- part for every guide and flag the old listing instead of quietly sending people to the dearer of the two.
- £1,320.18 inc VAT
- Clears 17 inch wheels
- 325 x 26mm two piece floating disc
- Pads and hoses priced separately; five caliper colours
- Made to order in up to 28 working days
Tarox 310mm and 318mm: where the wheel size jumps
This is the pair that carries the whole story of this page. The 310mm Sport is a 20mm thick disc that clears 17 inch wheels. Move up to the 318mm and the disc is thicker at 26mm, only 8mm bigger across the face, and Tarox’s own published figure for that kit moves the requirement to 18 inch.
Worth knowing while we are being honest about the numbers: the 310mm kit is actually £74 more expensive than the bigger, thicker 318mm kit. We have seen this kind of pricing quirk on other cars in this series and it is not something we can explain from the spec sheet. Buy on wheel size and disc thickness here, not on the sticker price alone, and ring us if you want it talked through.
- 310mm at £2,094.00 inc VAT, clears 17 inch; 318mm at £2,020.00 inc VAT, needs 18 inch
- Both complete with Corsa pads and braided hoses fitted
- 310mm disc is 20mm thick; 318mm disc is 26mm thick
- Six piston billet caliper, hand assembled in Italy
- ABS and ESP compatible, stated by Tarox
HiSpec 335mm Monster 4 and Monster 6: the track pick
The Monster caliper uses larger pistons than the Billet 4 with high temperature EPDM seals and stainless steel wear plates. Both the Monster 4 and Monster 6 sit on a 335mm disc and both clear a 17 inch wheel, the same as the smaller Tarox 310mm above and one wheel size smaller than the Tarox 318mm despite being a bigger disc than either.
For a road car that sees track evenings the Monster 4 is what Cameron fits: it brakes hard, pads are easy to source and the caliper holds up to repeated heat cycles. The Monster 6 is for genuine track use or a car making serious power over standard. If you are not sure which your driving suits, a five minute call before ordering usually settles it.
- Monster 4 at £1,650.00 inc VAT; Monster 6 at £1,671.90 inc VAT
- Both clear 17 inch wheels, despite a bigger disc than the 318mm Tarox above it in the table
- 335mm two piece floating discs
- High temperature EPDM seals and stainless steel wear plates
- Pads and hoses priced separately; five caliper colours
If the car is already on 18s
Four kits on this page need 18 inch wheels: the Tarox 318mm and 340mm, and HiSpec’s older 360mm Monster 4 and Monster 6. The Tarox pair is above; here is the HiSpec pair and the Tarox flagship together, since all three ask for the same wheel. The 340mm is the biggest kit we sell for this car. Its title says 10 piston, but Tarox’s own description and caliper code say 8, the B34GT/B360. We would rather correct that in writing than repeat a number we cannot back up.
What is actually in each box
The headline prices sit further apart than the finished builds do once you spec them level. Add pads and braided hoses to the HiSpec side and the gap with the Tarox kits narrows. Compare finished builds, not the headline numbers.
| In the box | HiSpec | Tarox |
|---|---|---|
| Calipers | Billet 4 or Monster, 6082 T6 billet aluminium | Sport or Super Sport, billet alloy, hand assembled in Italy |
| Discs | Two piece floating, with mounting bells | Two piece floating, balanced to 0.05mm |
| Brackets and hardware | Included | Included |
| Braided hoses | Priced separately | Included |
| Pads | Priced separately, your choice of compound | Corsa pads, fitted |
| Caliper finish | Black, red, blue, gold or silver | Black, red, blue, green or gold anodised |
| Built in | Dartford, UK, up to 28 working days | Northern Italy |
Every kit on this page compared
| Kit | Disc | Caliper | Smallest wheel | Pads and hoses | Price inc VAT |
|---|---|---|---|---|---|
| HiSpec 300mm Billet 4 2P | 300 x 22mm | 4 piston | 16in | Extra | £1,233.29 |
| Tarox 300mm Sport | 300mm | 6 piston | 16in | Included | £1,986.49 |
| HiSpec 325mm Billet 4 2P | 325 x 26mm | 4 piston | 17in | Extra | £1,320.18 |
| Tarox 310mm Sport | 310 x 20mm | 6 piston | 17in | Included | £2,094.00 |
| HiSpec 335mm Monster 4 | 335mm | 4 piston | 17in | Extra | £1,650.00 |
| HiSpec 335mm Monster 6 2P | 335mm | 6 piston | 17in | Extra | £1,671.90 |
| Tarox 318mm Sport | 318 x 26mm | 6 piston | 18in | Included | £2,020.00 |
| Tarox 340mm Super Sport | 340 x 26mm | 8 piston | 18in | Included | £2,670.00 |
| HiSpec 360mm Monster 4 | 360mm | 4 piston | 18in | Extra | £1,635.00 |
| HiSpec 360mm Monster 6 | 360mm | 6 piston | 18in | Extra | £1,863.00 |
Prices include VAT and were correct on 16 August 2026. Two things worth flagging while we are showing every price side by side: the Tarox 310mm costs more than the bigger, thicker 318mm above it, and the older HiSpec 360mm Monster 4 undercuts the smaller 335mm Monster 4. Neither is a typo on our part; both are how the kits are currently priced, and we would rather show you the real numbers than tidy them up.
Common questions
Why does the smaller Tarox disc need a bigger wheel than the bigger HiSpec disc?
Because the wheel size a kit needs is set by the caliper's shape and how far it sits out from the disc, not just by how wide the disc itself is. Tarox and HiSpec use different caliper designs, so their figures do not transfer across brands at the same diameter. Tarox publish their own minimum wheel size per kit, not by a general rule, which is why we look each one up individually instead of estimating from the disc size.
Do the HiSpec kits fit other Mini generations as well as the R56?
Yes. HiSpec list the current 2P kits for the R50, R52, R53, R55 to R59 and the F56 on the same part number, because the front hub has not changed across that run of Minis. The Tarox kits on this page are cut specifically for the R56, so if you are shopping for an R53 or an F56 the Tarox listing will be different even though the HiSpec one is not.
What is the difference between the old and new HiSpec 325mm Billet 4 listings?
Same caliper, same disc diameter, and the older listing on the site currently costs more than the current HISC- part. We use the current one, HISC-055, in this guide and would point any customer at that one over the older listing. If you spot the older one still live at a higher price, that is the reason.
Why are pads and hoses extra on the HiSpec kits?
HiSpec price their kits without pads or hoses so you choose the compound. A street pad and a track pad are very different things, and the right choice depends on how and where the car is used. Both pads and braided hoses can be added when you order, and we will put the finished build price together so you are comparing like for like against the Tarox kits, which arrive with Corsa pads and hoses fitted.
Will these kits work with ABS and ESP on the R56?
Tarox state full ABS and ESP compatibility on all R56 kits. For HiSpec, the fitment is to the front hub and does not touch the ABS sensor or reluctor ring, so compatibility on a standard R56 should be fine. If your car has had any non-standard ABS modifications, tell us when you order and we will check with HiSpec before the kit goes to build.
What we would actually fit
On a road car keeping its 16 inch wheels, the HiSpec 300mm Billet 4 does the job without asking you to change anything else. If you want the whole thing sorted in one delivery at the same wheel size, the Tarox 300mm Sport is the complete kit, pads and hoses included.
For most R56s on 17s doing normal road use, Garreth’s pick is the HiSpec 325mm Billet 4. It is the sensible next step up and the price is fair for what it is. If the car sees track days, the Monster 4 is what Cameron fits as the default, with the Monster 6 held back for anything making serious power or spending a lot of time late on the brakes, both still on 17 inch wheels.
The Tarox 310mm and 318mm are the pair to think about carefully rather than buy on price alone: the smaller disc costs more and needs a smaller wheel, the bigger disc costs less and needs a bigger wheel. Check your wheel size first, then let the disc follow it. Ring us on 0115 9893488 with your current wheel size and what the car does at weekends, and we will talk it through. Most calls like this are done inside five minutes.