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OMP J-Rally Helmet

From £336.00 Incl. VATFrom £280.00 Excl. VAT

Helmet Size

S (57cm-58cm)

M (58cm-59cm)

L (60cm-61cm)

XL (61cm-62cm)

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Size/Fitting guide

SKU: SC0-0801-B01-020 Categories: Open Face Motorsport Helmets, OMP Helmets

The OMP J-Rally, an open face rally helmet with intercom built in. Part number SC0-0801-B01-020.

FIA 8859-2024

Current FIA approval on the accepted list for Motorsport UK national events as at 2026. Helmet regulations change and approvals can be date-limited. Check the current Motorsport UK list against your series rules before purchasing any helmet.

Open face for rally use

In a rally car the co-driver reads pacenotes aloud and both crew members communicate through road sections. An open face helmet gives better voice clarity than a full face without a dedicated air passage. The J-Rally is designed for this: an approved helmet that lets you speak and hear clearly rather than muffling communication.

The intercom system

Fitted as standard, not an aftermarket addition. Ultra-slim speakers and an adjustable microphone boom. The output connector is a female Nexus plug, compatible with ZeroNoise amplifiers and any amplifier using a male Nexus plug. If your intercom system uses a different connector, tell us before ordering and we will check compatibility.

Construction and features

Composite shell rather than ABS, which is the right choice for a helmet that may encounter gravel or debris. HANS posts fitted as standard. Anti-dazzle adjustable peak. Fire-retardant lining.

Sizing

White only in this specification. Sizes S (57 to 58cm) to XL (61 to 62cm). Send us your head circumference for accurate sizing. Open face helmets need a firm fit, because there is no chin bar to help hold position in an impact.

Additional information

Colour	White
Helmet Size	S (57cm-58cm), M (58cm-59cm), L (60cm-61cm), XL (61cm-62cm)
Brand	OMP
Approval	FIA 8859-2024
Material	Composite
Communication	Intercom
Product Type	Motorsport
HANS Posts	Included

Motorsport helmet size guide

Helmet letters mean less here than anywhere else on the site. At 58 cm round the head you are a Bell M, a Sparco M and an Arai M, but a Stilo L and a Schuberth L. Measure once, then read your own number off the chart for the brand you are buying.

Measure your head

Bell put it best on their own guide, and every brand here measures the same way. Take the circumference about an inch above your eyebrows at the front, and at whatever point at the back gives you the biggest number. Take it three or four times and use the largest reading.

1Soft tape, level all the way roundA cloth tape, not a steel one. If the tape dips at the back you will read short.

2One inch above the eyebrowsThen around the widest part of the back of your head.

3Take it more than onceUse the biggest reading you get, not the average.

4Hair downMeasure as you would drive. A ponytail or a thick balaclava changes the answer.

Your size in every brand we stock

Find your measurement in the left column. A dash means that brand does not make a size at that measurement, not that it is out of stock.

Head cm	Bell	Bell HP/Pro	Stilo	Sparco	Arai	Schuberth	Zamp	OMP
53	XXS	–	–	XS	XS	–	XS	XXS
54	XXS	XXS	XS	XS	XS	XS	XS	XS
55	XS	XS	S	S	S	S	XS	XS
56	XS	S	–	S	S	–	S	S
57	S	S	M	M	M	M	S	S
58	M	M	L	M	M	L	M	M
59	L	L	L	ML	L	L	M	M
60	L	L	–	L	L	L+	L	L
61	XL	XL	XL	XL	XL	L+	L	L
62	XXL	61+	–	XXL	XL	XL	XL	XL
63	XXL	–	XXL	–	XXL	XXL	XXL	XL
64	3XL	–	XXXL	–	XXL	–	XXL	–

Sparco column is the Stealth RF ladder, which is what almost everything we stock from them uses. OMP column is the GP-R. Bell HP/Pro covers their HP, Carbon and Pro models, which use a different chart from the rest of the Bell range.

What catches people out

Bell run two different charts

Bell publish one chart for most of the range and a second for the HP, Carbon and Pro models. They are not the same. On the general chart a 56 cm head is an XS; on the HP, Carbon and Pro chart the same head is an S. That is why some Bell helmets on the site are sold as S, M, L and others as 54cm, 55cm, 56cm and so on up to 61+. The numbered ones are the HP, Carbon and Pro models and you pick your measured size directly.

Stilo run small, and skip some sizes

Stilo say it themselves: their helmets “run traditionally a hair smaller than other sizes on the market”. On top of that the ST6 ladder steps unevenly, so 56, 60 and 62 cm have no size of their own. If you measure at one of those, or you are on a boundary anywhere in the Stilo range, go up rather than down and ring us first.

A shell size is not a helmet size

Every brand here builds a handful of outer shells and then changes the padding inside to make the sizes. Going up a size inside the same shell costs you nothing in bulk or weight. Crossing into the next shell up makes the helmet visibly bigger and noticeably heavier, which you feel over a long stint and which matters if you are tight for room in the car.

Range	Shells	Which sizes share a shell
Stilo ST5 full face	2	Small 54 to 59, large 60 to 64
Stilo Venti open face	3	Small 54 to 58, medium 59 and 61, large 63 and 64
Stilo Sport	2	Small XS to M, large L and XL
Schuberth SF4 and SP1	2	Small XS to L, large L+ to XXL
Sparco Stealth RF	2	Seven sizes over two shells
Arai	up to 6	Roughly one shell per two sizes

Shell splits published by Stilo and Schuberth. Arai build more outer shells than anyone else here and also offer different shell shapes for rounder and longer heads, which is worth knowing if other brands have never quite fitted you.

Full charts by brand

Bell, general rangeGT6, RS7, Mag, X-1, K1 and the rest. 51 to 68 cm.▼

Head cm	Size	Hat size
51	4XS	6 3/8
52	3XS	6 1/2 – 6 5/8
53 – 54	XXS	6 3/4 – 6 7/8
55 – 56	XS	7
57	S	7 1/8 – 7 1/4
58	M	7 1/4 – 7 3/8
59 – 60	L	7 1/2
61	XL	7 5/8 – 7 3/4
62 – 63	XXL	7 7/8 – 8
64 – 65	3XL	8 1/8 – 8 1/4
66 – 68	4XL	8 3/8 – 8 1/2

Bell, HP / Carbon / ProHP6, HP7, HP10, HP77, GT6 Carbon, RS7 Carbon. Sold by measured size.▼

Head cm	Size	Hat size
54	XXS	6 3/4 – 6 7/8
55	XS	7
56 – 57	S	7 1/8 – 7 1/4
58	M	7 1/4 – 7 3/8
59 – 60	L	7 1/2
61	XL	7 5/8 – 7 3/4
61+	XL	7 5/8 – 7 3/4

These are the models listed on the site as 54cm, 55cm and so on. 61+ is Bell’s largest liner in this range.

StiloST6 GT, GTN, FN and the Venti range. Runs slightly small.▼

Size	Head cm
XS	54
S	55
M	57
L	58 – 59
XL	61
XXL	63
XXXL	64

The Venti Trophy Rally range uses a different, continuous ladder: XS 53-54, S 55-56, M 57-58, L 59-60, XL 61-62, XXL 63-64. If the uneven steps above put you between sizes, that range may cover you.

SparcoStealth RF, Stealth RF Carbon, Flux RJ-i and the RJ range.▼

Size	Head cm
XS	53 – 54
S	55 – 56
M	57 – 58
ML	59
L	60
XL	61
XXL	62

Sparco also publish a generic six size chart (XS 53-54, S 55-56, M 57-58, L 59-60, XL 61-62, XXL 63-64). The seven size ladder above, with an ML at 59 cm, is the one the Stealth RF range actually uses, so go by that for the helmets we stock.

AraiGP-6S, GP-7, GP-Jet 3. The most shell sizes of any brand here.▼

Size	Head cm
XS	53 – 54
S	55 – 56
M	57 – 58
L	59 – 60
XL	61 – 62
XXL	63 – 64

SchuberthSF3, SF4 and SP1. Note the L+ size between L and XL.▼

Size	Head cm	Shell
XS	54	Small
S	55	Small
M	57	Small
L	58 – 59	Small
L+	60 – 61	Large
XL	62	Large
XXL	63	Large

Zamp and OMPSmaller ranges. Neither publishes a chart, so these are the sizes as we list them.▼

Brand	Size	Head cm
Zamp	XS	53 – 55
Zamp	S	56 – 57
Zamp	M	58 – 59
Zamp	L	60 – 61
Zamp	XL	62
Zamp	XXL	63 – 64
OMP GP-R
OMP	XXS	52 – 53
OMP	XS	54 – 55
OMP	S	56 – 57
OMP	M	58 – 59
OMP	L	60 – 61
OMP	XL	62 – 63

The OMP J-Rally uses a different ladder again: S 57-58, M 58-59, L 60-61, XL 61-62. Ring us for that one.

How a helmet should fit

Tight, then tighter than you think

A new helmet should be snug enough that it is slightly awkward to pull on, and the cheek pads should push your cheeks up. The lining compresses with use, so a helmet that is merely comfortable in the showroom will be loose by the end of the season. Do the roll-off test: with the strap done up, take the back of the helmet and try to rotate it forwards off your head. If it moves, it is too big.

Open face and full face are not the same fit

An open face sits differently because there is no chin bar pulling the shell forward, and several brands build their open face range on a separate set of shells. If you are moving from one to the other, do not assume your size carries across. Stilo in particular build the Venti open face on three shells and the ST full face on two.

Glasses

Say so when you order. Some models take a glasses channel in the cheek pads and some do not, and it is much easier to sort out before the helmet ships than to feed the arms in afterwards.

Buying a helmet and a head restraint together?The helmet needs FHR anchor posts fitted, and where a helmet is sold as a package here it already has them. If you are buying the two separately, tell us and we will make sure the posts and the tether length match the helmet you have chosen.

Send us your measurementGive us your head circumference in centimetres and the model you are looking at. Helmets are the one thing worth getting right first time, and we would far rather check it with you than process a return. Call 0115 989 3488 or email Sales@GSMPerformance.co.uk.

Bell from bellracing.com. Stilo shell and fit information from stilohelmets.com. Sparco generic chart via Racecar Engineering, model ladder from the range we stock. Arai from whyarai.co.uk. Schuberth from their published SF4 and SP1 data. Zamp and OMP from the sizes on the products themselves. All checked 2 August 2026. If the chart in the box disagrees with this page, the box wins and we would like to know.

How do I get the right size?
Measure around your head at the widest point, about an inch above your eyebrows, and match the centimetres to the size options (this one runs from roughly 57cm to 62cm). The fit should be snug all round with no pressure points, and it should not rotate when you shake your head. Between sizes, try the smaller one first, as linings bed in. Our helmet buying guide covers fit in detail, or call us and we will talk it through.

Is it legal for UK motorsport?
This helmet carries FIA 8859-2024, which is on the current Motorsport UK accepted list for car competition, so it will pass scrutineering at national events. Our guide to FIA and Snell helmet standards explains the whole list and how long each standard lasts.

Does it work with a HANS device?
Yes, it comes with HANS posts fitted, so it clips straight to a HANS or hybrid FHR device with the matching tethers. If you have not chosen a device yet, our guide on which HANS device you need covers angles, sizes, and fitting.

Can I use it with an intercom?
Yes, this helmet is intercom-ready, so it pairs with the practice and rally intercom systems in our range without surgery. Tell us which amplifier you run and we will confirm the right lead.

Am I allowed an open face helmet in my car?
In a closed car, yes. Motorsport UK requires eye protection rather than a full face: a visor or goggles must be worn unless you are in a closed car, and no car rule says the helmet itself must be full face. Full detail, including what counts as a closed car, is in our guide on open face versus full face helmets.

How do I look after it?
Store it in its bag away from heat and direct sun, clean the shell with mild soap and water only (solvents attack the finish and the shell), and let the lining air out after use. And the big one: after any significant impact, replace the helmet even if it looks fine, as the protective liner is designed to crush once.

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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.