Sparco K-Rapid WP Kart Boots

From £194.40 Incl. VATFrom £162.00 Excl. VAT

FIA 8877-2022 race boots with the thin, flexible sole that gives real pedal feel, sizes UK 4 | EU 37 to UK 13 | EU 48. Most drivers take their normal trainer size; ask us if you are between sizes.

Shoe Size

UK 4 | EU 37

UK 5 | EU 38

UK 5.5 | EU 39

UK 6.5 | EU 40

UK 7 | EU 41

UK 8 | EU 42

UK 9 | EU 43

UK 9.5 | EU 44

UK 10.5 | EU 45

UK 11 | EU 46

UK 12 | EU 47

UK 13 | EU 48

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Size/Fitting guide

SKU: BKB0008B0 Category: Karting Shoes

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The 2026 Sparco K-Rapid WP kart boots are designed for drivers who need dependable comfort and control in wet racing conditions. This waterproof evolution of the K-Rapid keeps your feet warm and dry while maintaining a close, secure fit that supports consistent and precise pedal inputs.

A soft microfibre leather upper is combined with welded seams and a fully integrated waterproof membrane to create a durable, sealed construction that resists water ingress during rain-soaked sessions. The advanced rotor lace closure system uses an internal ribbon to distribute pressure evenly across the entire foot, delivering quick adjustment, secure fitment, and reliable pedal feel. Inside, a supportive footbed and anatomical insole help reduce vibration and fatigue, allowing you to stay focused throughout longer stints.

Built to minimise distraction caused by cold or damp footwear, the K-Rapid WP supports steady concentration and confident control when conditions are at their worst.

Approval:

FIA 8877-2022 Approved for Karting.

Key Features & Benefits:

Soft microfibre leather upper – Durable synthetic leather provides a supple yet hard-wearing outer layer that performs reliably in wet conditions while maintaining long-term comfort.
Welded seams – Heat-bonded construction removes stitch holes, improving water resistance and helping keep feet dry during prolonged use.
Integrated waterproof membrane – A built-in barrier blocks moisture from entering the boot, supporting warmth, comfort, and concentration in wet races.
Elasticated breathable anti-bacterial lining – A stretch inner lining moves with your foot to reduce friction and maintain a close, comfortable internal fit.
Rotor lace system with integrated ribbon – Dial-based closure evenly tightens across the whole foot for quick fitment, secure hold, and consistent pedal feel.
Shock-absorbing footbed – Cushioned mid-layer reduces vibrations and impact from the chassis, helping limit foot fatigue during longer sessions.
Anatomic insole – Shaped to support natural foot contours, improving weight distribution and comfort over extended running.
High-grip rubber sole – Textured sole compound delivers dependable traction on damp pedals for accurate and consistent inputs.
Reinforced heel box with abrasion-resistant panels – Strengthened heel structure and protective sections improve durability and stability during frequent kart use.

Additional information

Approval	FIA 8877-2022
Brand	Sparco
Colour	Black & White
Material	Waterproof Material, Leather
Product Type	Karting
Shoe Size	UK 4 \| EU 37, UK 5 \| EU 38, UK 5.5 \| EU 39, UK 6.5 \| EU 40, UK 7 \| EU 41, UK 8 \| EU 42, UK 9 \| EU 43, UK 9.5 \| EU 44, UK 10.5 \| EU 45, UK 11 \| EU 46, UK 12 \| EU 47, UK 13 \| EU 48

Karting boot size guide

Kart boots use exactly the same size ladders as race boots, which means the same trap applies: Sparco and OMP share one ladder and Alpinestars run their own. The same UK size is a different EU number depending on which you buy.

Measure the foot

Two minutes with a sheet of paper beats any conversion chart, and it matters more for a kart boot than a road shoe because the sole is thin and the fit is close.

1Stand on paper against a wallHeel to the skirting, weight on the foot. Sitting down reads short.

2Mark the longest toeNot always the big toe. Measure heel to mark in centimetres.

3Do both feetWork from the bigger one.

4Wear kart socksThicker than everyday socks and they take up real room.

Foot length to size

Sparco and OMP both publish foot length against their sizes and never disagree by more than three millimetres.

EU	UK	Sparco length	OMP length
36	3.5	23.7 cm	23.5 cm
37	4	24.3 cm	24.5 cm
38	5	25.0 cm	25.0 cm
39	5.5	25.7 cm	25.5 cm
40	6.5	26.3 cm	26.0 cm
41	7	27.0 cm	27.0 cm
42	8	27.7 cm	27.5 cm
43	9	28.3 cm	28.1 cm
44	9.5	29.0 cm	28.7 cm
45	10.5	29.6 cm	29.5 cm
46	11	30.3 cm	30.2 cm
47	12	31.0 cm	31.0 cm
48	13	31.6 cm	31.5 cm

Alpinestars do not publish foot lengths. Use the EU column here to get into the right area, then read your UK size off the table below.

The same UK size, two different EU numbers

Alpinestars carry four half steps that Sparco and OMP do not: 40.5, 42.5, 43.5 and 45.5. From UK 7 upwards their EU numbers stop lining up with everyone else.

UK	Sparco and OMP	Alpinestars
3.5	36	–
4	37	37
5	38	38
5.5	39	–
6	–	39
6.5	40	40
7	41	40.5
7.5	–	41
8	42	42
8.5	–	42.5
9	43	43
9.5	44	43.5
10	–	44
10.5	45	–
11	46	45.5
12	47	47
13	48	–

A dash means that brand does not make a kart boot in that size. Order by the UK size, because it is the one we have checked against each brand’s own ladder for every product on the site.

Overshoes

The Sparco rubber and neoprene overshoes go over your kart boots rather than replacing them, so size them to your boot and not to your foot. The slip-on rubber pair are sold S to XL against a boot size, and the neoprene pair on the normal EU ladder.

How a kart boot should fit

Close, with no heel movement

Toes near the end and no sliding at the heel. A kart pedal box gives you very little room, and a boot with growing space moves on the pedal exactly when you do not want it to. Between two sizes, take the larger and let a thicker sock take up the difference.

The sole is deliberately thin

There is no cushioning, because the point is feeling the pedal through it. A kart boot that feels flat standing in the showroom is doing its job and will not soften into a walking boot.

Buying for a child

Size to the measurement today rather than to next season. A loose boot slips off the pedal, and they will have outgrown it before the extra room becomes useful.

Not sure between two sizes?Send us the foot length in centimetres and the boot you are looking at and we will tell you which to take. Call 0115 989 3488 or email Sales@GSMPerformance.co.uk.

Sparco from sparco-official.com. OMP from the size chart on their Tecnica shoe product page. Alpinestars UK labels from the UK retail convention checked against three UK retailers on 1 August 2026, which is what our listings carry. All checked 2 August 2026.

Have you written anything about this exact product?
Yes, we have covered this exact product: Stay Dry, Stay in Control: Introducing the Sparco K-Rapid WP Kart Boots. That is first-hand coverage from our own builds and showroom, not brochure copy.

What size should I order?
Sizes run from UK 4 | EU 37 up to UK 13 | EU 48. Kart boots fit close like race boots, so most drivers take their normal trainer size. If you are between sizes or wear a wide fit, ask us before ordering.

Are they legal for competition karting?
These boots are homologated to FIA 8877-2022, the current FIA karting standard, which is what scrutineers look for in championship karting.

Why the thin sole and high ankle?
The thin sole gives you pedal feel, and the high cut protects and supports the ankle, which sits exposed next to the bodywork in a kart. It is also why kart boots make poor walking shoes, so keep them for driving.

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At GSM Performance, our priority is to maintain the utmost hygiene and quality standards for the benefit of our customers. To that end, we have instituted a policy that all purchases of long johns, balaclavas, tops, and underwear are final and non-returnable. This policy is necessary due to the personal nature of these items, which are worn in close contact with the body. This protocol is intended to guarantee the health and safety of all our customers.

This policy adheres to the best industry practices and safeguards both our customers and our staff. It's important to clarify that this policy does not affect your statutory rights as a consumer. This policy does not apply if you receive damaged or defective products. In such cases, our customer service team is available to promptly address your concerns and arrange a replacement or refund. We greatly appreciate your understanding and adherence to our hygiene policy and thank you for your continued confidence in GSM Performance. For further information please see our terms and conditions which are agreed on checkout.

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