Our Top Recommended Big Brake Upgrade Kits For Your Citroen Saxo
The Saxo is the lightest car we have written one of these guides for, and that changes the shape of the advice. A big brake kit on a heavy saloon is about heat capacity: how much energy the discs can swallow before they give up. On a car this light it is much more about pedal feel and consistency, and about what will physically clear the small wheels most Saxos are running.
It is also a car where our own price list throws up two things worth pointing at before you scroll. The HiSpec 325mm kit is six pounds more than the 300mm, for 25mm more disc. And the Tarox 284mm costs more than the Tarox 305mm, so the smallest kit in that range is not the cheapest one. Both are explained below. Everything here comes from Tarox in northern Italy and HiSpec Motorsport in Dartford, and the full Saxo range is on the site if you want to browse it raw.
- Five Tarox kits and three HiSpec kits are in stock, so this is one of the better served cars in the range
- The HiSpec 325mm is six pounds more than the 300mm for 25mm more disc
- The Tarox 284mm is dearer than the Tarox 305mm, so buy on wheel size and not on price
- Kits exist for 15, 16 and 17 inch wheels from both brands
Two brands, two ways of building a brake kit
Both machine their own calipers from billet aluminium and build every kit for the specific car it is going on. Where they differ is what goes in the box and how it is priced.
Tarox
Built at the factory in northern Italy. Calipers are CNC machined from European billet alloy and hand assembled, discs are heat treated and hand balanced to 0.05mm. The Saxo is unusually well covered: five kits from 284mm up to the 340mm Super Sport, every one arriving complete with vehicle specific braided hoses and Corsa pads already fitted. Tarox state full compatibility with ABS and ESP.
HiSpec Motorsport
Machined in Dartford from 6082 T6 billet aluminium, calipers and pistons both. Three Billet 4 kits for the Saxo at 285mm, 300mm and 325mm, covering 15, 16 and 17 inch wheels. Made to order in up to 28 working days, calipers in black, red, blue, gold or silver. Pads and braided hoses are priced separately so you pick the compound.
Wheel sizes: real numbers for every kit
This is the section that matters most on a Saxo, because plenty of them are still on 14 or 15 inch wheels and the wheel decides the kit. Minimum wheel diameter is a property of the kit and not of the car, so a figure published against one car holds for every car that kit is listed against. The Tarox figures below were looked up from their own product pages for these exact kits. The only check that stays a conversation is depth, because a wheel of the right diameter can still foul a caliper at the spokes.
| Kit | Disc | Smallest wheel |
|---|---|---|
| HiSpec 285mm Billet 4 | 285mm | 15 inch |
| Tarox 284mm 6 pot | 284mm | 15 inch |
| HiSpec 300mm Billet 4 | 300mm | 16 inch |
| Tarox 305mm 6 pot | 305mm | 16 inch |
| HiSpec 325mm Billet 4 | 325mm | 17 inch |
| Tarox 318mm 6 pot | 318mm | 17 inch |
| Tarox 330mm 6 pot | 330mm | 17 inch |
| Tarox 340mm Super Sport | 340mm | 17 inch |
HiSpec 285mm Billet 4: the cheapest way in, and it clears 15s
The entry kit for the Saxo and the cheapest conversion on this page at £1,254.00. The Billet 4 is the caliper HiSpec make most of: four pistons, machined from 6082 T6 billet aluminium, with external boots to keep road grime out of the seals. At 285mm it clears a 15 inch wheel, which is what a lot of Saxos are still wearing.
On a car this light that is genuinely enough brake for fast road use. Pads and braided hoses are priced separately, which keeps the number down and lets you pick a compound to match how the car gets driven.
- £1,254.00 inc VAT
- Fits behind 15 inch wheels
- 285mm disc, four piston Billet 4 caliper
- Pads and braided hoses priced separately
- Five caliper colours, made to order in the UK, up to 28 working days
HiSpec 300mm and 325mm: 25mm more disc for six pounds
Here is the one worth reading twice. The HiSpec 300mm Billet 4 is £1,464.00 and the 325mm Billet 4 is £1,470.00. Same caliper, same construction, and the bigger kit is six pounds dearer. Not sixty. Six.
So the decision is not about money, it is entirely about your wheels. The 300mm clears a 16 inch wheel and the 325mm needs a 17. If you are on 17s already, there is no argument to make: take the 325mm and enjoy the extra 25mm of disc for the price of a round of drinks. If you are on 16s, the 300mm is your kit and the six pounds is irrelevant either way.
- 300mm at £1,464.00, 325mm at £1,470.00, both inc VAT
- 300mm clears 16 inch, 325mm needs 17 inch
- Same four piston Billet 4 caliper on both
- Six pounds between them, so buy purely on wheel size
- Pads and braided hoses priced separately
Tarox 305mm 6 pot: the complete kit, and the value pick of the range
The entry point into Tarox for the Saxo, and the one we would steer most people towards if they want everything in one box. Six pistons, a two piece floating disc balanced to 0.05mm at the factory, and vehicle specific braided hoses and Corsa pads already fitted. Minimum wheel is 16 inch.
It is also, oddly, cheaper than the smaller 284mm kit in the same range, at £1,860.66 against £1,997.16. If your wheels will clear a 305mm disc then this is the better buy on every measure, and there is a section further down about the 284mm for anyone whose wheels will not.
- £1,860.66 inc VAT, complete
- Fits behind 16 inch wheels
- Corsa pads and braided hoses included and fitted
- Six piston caliper, hand assembled in Italy
- 305mm two piece floating disc, balanced to 0.05mm
Tarox 318mm and 330mm: the 17 inch middle ground
Both of these need a 17 inch wheel and both use the same six piston caliper as the 305mm, with more disc in front of it. The 318mm is £2,020.00 and the 330mm is £2,280.00, so unlike the HiSpec pair above this step does cost real money.
Garreth’s read on the two: on a car as light as a Saxo, the 318mm is plenty and the 330mm is buying headroom you will probably never use on the road. If the car is doing serious track time and you want the biggest disc that is not the flagship, the 330mm earns it. Otherwise the 318mm is the sensible one.
- 318mm at £2,020.00, 330mm at £2,280.00, both inc VAT
- Both need 17 inch wheels
- Corsa pads and braided hoses included and fitted on both
- Six piston caliper, two piece floating discs
- Balanced to 0.05mm at the factory
Tarox 340mm Super Sport: the flagship
The biggest kit listed for the Saxo and comfortably more brake than the car needs, which has never stopped anyone. The Super Sport caliper uses sequentially sized pistons so the pad wears evenly across its face and the pedal stays consistent as heat builds. The 340mm two piece floating disc still clears a 17 inch wheel, which is the surprising part.
One note on the listing, because we would sooner say it than have you counting pistons when it arrives. The title says 10pot. That was the older caliper design. The current B34GT runs eight sequential pistons and eight is what turns up.
- £2,610.00 inc VAT, complete
- Fits behind 17 inch wheels
- Corsa pads and braided hoses included and fitted
- 8 sequential pistons despite the 10pot in the title
- 340mm two piece floating disc, balanced to 0.05mm
Still on 15 inch wheels?
Plenty of Saxos are, and both brands have an answer. The HiSpec 285mm Billet 4 at £1,254.00 is the cheap one and it is the kit we sell most of for cars on small wheels. Tarox also list a 284mm six pot, and it is the complete-in-one-box option at that size.
The honest bit: the Tarox 284mm is £1,997.16, which is more than their own 305mm kit at £1,860.66. You are paying a premium for the smaller disc, because it is a lower volume fitment. If your wheels will clear a 305mm, buy the 305mm. If they genuinely will not, the 284mm is the kit and now you know why the number looks the way it does.
What is actually in each box
The headline gap between HiSpec and Tarox closes once both are specced to the same level. HiSpec price their kits without pads or braided hoses, so you add those separately and choose the compound. Tarox include both, with the pads already fitted. Compare the finished builds, not the entry prices.
| In the box | HiSpec | Tarox |
|---|---|---|
| Calipers | Billet 4, 6082 T6 billet aluminium, four piston | Six piston, or eight sequential on the Super Sport |
| Discs | Sized to the kit, 285mm to 325mm | 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 285 Billet 4 | 285mm | 4 piston | 15in | Extra | £1,254.00 |
| HiSpec 300 Billet 4 | 300mm | 4 piston | 16in | Extra | £1,464.00 |
| HiSpec 325 Billet 4 | 325mm | 4 piston | 17in | Extra | £1,470.00 |
| Tarox 305 6 pot | 305mm, 2P | 6 piston | 16in | Included | £1,860.66 |
| Tarox 284 6 pot | 284mm, 2P | 6 piston | 15in | Included | £1,997.16 |
| Tarox 318 6 pot | 318mm, 2P | 6 piston | 17in | Included | £2,020.00 |
| Tarox 330 6 pot | 330mm, 2P | 6 piston | 17in | Included | £2,280.00 |
| Tarox 340 Super Sport | 340mm, 2P | 8 piston | 17in | Included | £2,610.00 |
Prices include VAT and were correct on 22 August 2026. Tarox minimum wheel sizes were looked up from their own product pages per kit. The table is sorted by price, which is why the Tarox 284mm sits above the 305mm.
Common questions
Why is the Tarox 284mm dearer than the 305mm?
Because it is a lower volume fitment, and small disc kits are not cheaper to make. Both were checked against our live pricing on 22 August 2026. It matters only if your wheels will not clear a 305mm disc: if they will, buy the 305mm, which is bigger and cheaper. If they will not, the 284mm is the right kit and the price is what it is. We would sooner explain that than have you assume the list is wrong.
Is a 340mm disc overkill on a Saxo?
For road use, comfortably. The Saxo is a light car and the front axle is not asking much of a brake by modern standards, so the smaller kits do the job properly. The bigger kits earn their money on sustained track use, where the extra disc keeps temperatures under control lap after lap. If the car is a road car that goes out a few times a year, spend the difference on pads and fluid instead.
Will any of these fit behind 14 inch wheels?
No. The smallest kits here need a 15 inch wheel, so a Saxo on 14s needs new wheels as part of the job. That is worth budgeting for at the start, because the wheel decides the kit and not the other way round. Tell us what you are planning to run and we will work back from there.
Why are pads and hoses extra on the HiSpec kits?
HiSpec price the hardware bare so you choose the compound to match how the car is used: a softer road pad for a daily driver, something more aggressive for track evenings. Both pads and braided hoses can be added at the same time. We will quote the finished build level so you can compare it properly against the Tarox kits, which include both as standard.
How long before it arrives?
HiSpec kits are made to order in Dartford, so allow up to 28 working days. Tarox kits are built for the specific car at the factory in Italy and lead times vary through the year, so ask when you place the order and we will give you the current picture. Neither brand keeps finished Saxo kits on a shelf.
What we would actually fit
On a Saxo on 15 inch wheels, the HiSpec 285mm Billet 4 at £1,254.00 and budget for pads and hoses at the same time. On 17s, the HiSpec 325mm at £1,470.00 is the value of the whole page, because it is six pounds more than the 300mm for 25mm more disc. If you want one box with nothing left to source, the Tarox 305mm at £1,860.66 on 16 inch wheels, which is also cheaper than their own smaller kit.
For a Saxo doing real track work on 17s, the Tarox 318mm is the sensible flagship and the 340mm Super Sport is there if you want the biggest thing that fits. Ring us on 0115 9893488 with your wheel size and what the car does at weekends. Working out what clears and what fouls is Cameron’s corner of the business, so have the wheel make and model handy and you will get a straight answer.