Your JavaScript seems to be deactivated! Please activate JavaScript to benefit from the full functionality of the shop.

100 Days Right Of Return

Free delivery from

GB / from £6.96 Delivery costsGB / GBPfrom £6.96

.ICCountryIcon{background-position-y:-1742px}

Open navigation

- Categories
- Back
- Categories
- PlaceHolder
Motorcycle
Bicycle
Snow Mobile
Casual
E-Scooter
Brands
SALE %
Gift Coupons

My bike

Home Motorcycle Helmets & Accessories Cross / Enduro Oneal Sierra II Flat Motocross Helmet

-20%

Oneal Sierra II Flat Motocross Helmet

from Oneal

Please note: Helmets displayed with black or mirrored visors, will always be delivered with a clear visor!

£131.72

You save 20%

£105.41

Net price plus shipping; you may be liable for taxes & duties in the destination country

Notify on availability

Currently not deliverable

Würselen store

Order your product online for pick-up at the store.
How it works

Description

shell is constructed with ABS (acrylnitril-butadien-styrol-copolymer)
weight: 1590 g (± 50 g)
clear Visor plus secondary integrated sunvisor
Pinlock 30 fog resistant insert lens included
soft, sweat absorbing inner padding is removable and washable
height adjustable helmet shield
vent holes for optimal ventilation
Microlock buckle
durable multi-colored clear coated graphics
ECE 22.05

Additional product information

Features	Sun Visor
Buckle	Double-D

Ratings (36)

Customer ratings for Oneal Sierra II Flat Motocross Helmet

Number of ratings: 36
Average rating: 4.8

13 Deutsch 10 English 3 Français 1 Español 3 Português 3 Русский язык 3 日本の all

Read all ratings

excellent cost performance (01.11.2021)

Anonymous425641608

There is no hassle of putting on and taking off goggles, and I think it is ideal for getting started with off-road touring.

Good (21.10.2021)

Anonymous425641608

Add to the description: chin curtain.

Just perfect (19.10.2021)

Anonymous425641608

Read all ratings

How to take correct measurements »

Men

Men
Shirt size	Trousers size	German size	Chest circumference (cm)	Shirt length (cm)	Sleeve length (cm)	Waist circumference (cm)	Inside leg length (cm)
	28	42				71	76
	30	44				76	77.5
S	32	46/48	81,5-84	106.5	84	81.5	78.5
M	34	48/50	86,5-89	112	86.5	86.5	78.5
L	36	52	91,5-96,5	122	89.5	91.5	80
XL	38	54	101,5-106,5	129.5	92.5	96.5	81
XXL	40	56	112-117	139.5	94	101.5	81

* Change in sizes as of 2015

The new size M is the old size S
Size S was revised
L, XL and XXL remain unchanged

Women

Women
Shirt size	Trousers size	German size	Chest circumference (cm)	Shirt length (cm)	Sleeve length (cm)	Waist circumference (cm)	Inside leg length (cm)
XS	3/4	34				66	73.5
S	5/6	36	83.5	104	76	68.5	75
M	7/8	38	91.5	106.5	78.5	73.5	76
M	9/10	40	91.5	106.5	78.5	78.5	77.5
L	11/12	42	95	109	81.5	84	78.5

Kids

Kids
Shirt size	Trousers size	US size	Chest circumference (cm)	Shirt length (cm)	Sleeve length (cm)	Waist circumference (cm)	Inside leg length (cm)
S	22	3/4	61	76	62	56	51
M	24	5/6	68.5	84	66	61	51
L	26	8/10	78.5	91.5	72.5	66	54.5
XL	27	12/14	89	100.5	77	68.5	61

Helmets

Helmet sizes
Head circumference in cm	52-54	54-56	57-58	59-60	60-62	63-64
Head circumference in inches	20 1/2" - 21 1/8"	21 1/4" - 22 1/8"	22 3/8" - 23 1/8"	23 1/4" - 23 3/4"	23 7/8" - 24 3/4"	24 7/8" - 25 3/4"
Ordering size	XS	S	M	L	XL	XXL

Helmet sizes for kids
Head circumference in cm	47,5-49	49-51	51-55,5
Head circumference in inches	18 5/8" - 19 5/8"	19 1/4" - 20 "	20 1/8 " - 21"
Ordering size	S	M	L

Shoes & Boots

Shoe and boot sizes
UK sizes	4	6	7	8	9	10	11	12	13
German sizes	37	38	39/40	41/42	43	44	45	46	47

Shoe and boot sizes for kids
UK sizes	12	13	1	2	3	4	5	6
German sizes	30	31	32	33	34	36	37	38

Gloves

Gloves
Ordering sizes	XS	S	M	L	XL	XXL
US sizes	7	8	8.5	9	10	11

	A. Body height: Take off your shoes and stand barefoot with your back against a wall to measure your body height to the top of your head. B. Chest circumference: Measure horizontally around the widest part of your chest. C. Waist circumference: Measure horizontally around your waist. D. Inside leg length: Inside leg measured from the crotch to the ground.
	A. Body height: Take off your shoes and stand barefoot with your back against a wall to measure your body height to the top of your head. B. Chest circumference: Measure horizontally around the widest part of your chest. C. Waist circumference: Measure horizontally around your waist. D. Inside leg length: Inside leg measured from the crotch to the ground.
	A. Measure the circumference of your head to get the correct helmet size. Use a measuring tape around the widest point of your head (approx. 1 cm above the ears).
	A. Place both feet on a sheet of paper. Draw a vertical line to mark the tip and heel end of your foot. B. Measure the lengths of both feet. C. Compare the length of the bigger foot with the size table to find your perfect shoe size.
	A. Measure the circumference of your hand at the widest point around your palm to find the correct glove size. Copy the value into the table

Shipping

Possible delivery methods:
UPS Italia (Italy), DHL (Norway), UPS France, UPS Slovenija (Slovenia), UPS Ireland, UPS Suomi (Finland), UPS Eesti (Estonia), UPS Belgique (Belgium), UPS Nederland (Netherlands), UPS España (Spain), UPS Polska (Poland), UPS Portugal, UPS (Czech Republic), UPS Ελλάδα (Greece), UPS Sverige (Sweden), DHL Suisse (Switzerland), UPS Luxembourg, UPS Germany, UPS Slovenská (Slovakia), UPS Magyarország (Hungary), DHL Germany, UPS Österreich (Austria), UPS Danmark (Denmark), UPS България (Bulgaria), UPS România (Romania), España Islas Canarias, UPS Latvija (Latvia), UPS Lietuva (Lithuania), DHL Portugal Island, DHL Hrvatska (Croatia), Bosnia & Herzegovina, DHL Malta, DHL Serbia and Montenegro, DHL Cyprus, DHL Liechtenstein, Pick up in the store, DHL World (outside Europe), DHL EXPRESS Z03, DHL EXPRESS Zone 9, DHL Belgique (Belgium), DHL България (Bulgaria), DHL (Czech Republic), DHL Danmark (Denmark), DHL Portugal, DHL España (Spain), DHL Ελλάδα (Greece), DHL France, DHL United Kingdom, DHL Eesti (Estonia), DHL Ireland, DHL Italia (Italy), DHL Latvija (Latvia), DHL Lietuva (Lithuania), DHL Luxembourg, DHL Magyarország (Hungary), DHL Nederland (Netherlands), DHL Österreich (Austria), DHL Polska (Poland), DHL România (Romania), DHL Slovenija (Slovenia), DHL Suomi (Finland), DHL Slovenská (Slovakia), DHL Sverige (Sweden), DHL Zone 4 A NON-EU, DHL Zone 3 A NON-EU, UPS Express Saver, DHL EXPRESS Zone 4, UPS Express Saver, UPS Express Saver, UPS Express Saver, UPS Express Saver Zone 5, DHL EXPRESS Zone 8, UPS Express Saver, UPS Express Saver, UPS Express Saver, DHL EXPRESS Zone 5, DHL EXPRESS Zone 11, DHL EXPRESS Zone 2, DHL EXPRESS Zone 10, DHL EXPRESS Zone 6, DHL EXPRESS Zone 1, DHL EXPRESS Zone 7, DHL EXPRESS Zone 7 (USA), UPS Express Saver, DHL Germany Bulky Freight, DHL EU bulky goods, DHL World (outside Europe) bulky goods

Customers who bought this product also bought

-82%

FC-Moto Logo Multifunctional Hea...

(722)

£12.41 | You save 82%

£2.19
-77% Special offer

Bogotto Multifunctional Headwear

(490)

£12.41 | You save 77%

from £2.89
-86%

FC-Moto Logo Sticker Set

(148)

£5.12 | You save 86%

£0.73
-73% Special offer

FC-Moto Hump 2.0 Motorcycle Back...

(351)

£51.20 | You save 73%

£13.87
-50% Special offer

Bogotto V331 Enduro Helmet

(73)

£139.04 | You save 50%

£69.50
-54% Special offer

Bogotto V331 Pro Tour Enduro Hel...

(110)

£168.29 | You save 54%

£76.82
-15%

Oneal Baja Racing Motocross Jacket

(25)

£102.47 | You save 15%

£87.11

Available in multiple variations
-25%

Acerbis Flip FS-606 Enduro Helmet

(19)

£117.08 | You save 25%

£87.80
-31% Special offer

LS2 MX436 Pioneer Evo Motocross ...

(18)

£116.39 | You save 31%

£80.48
-64% Special offer

Bogotto Hump Motorcycle Backpack

(303)

£51.20 | You save 64%

£18.26

Browse these categories as well: Motorcycle Cross Helmets & Enduro Helmets, Motocross Helmets, Helmets

Thematic areas

Service

FC Moto

Newslettersubscribe

Subscribe to the newsletter & secure yourself attractive advantages:
- Exclusive offers, new products & trends
- Attractive discounts, bargains & vouchers

- Large product range with more than 150,000 items and top rating at Trustpilot, Idealo ...

Large selection

Top brands

More than 100 brands

Products

Huge range with more than 150,000 items

Best price guarantee

Always current market prices and attractive offers

FC-Moto rating

- 100 days return policy and guarantee for reimbursement

Wolrdwide Shipping

We ship worldwide and many products directly from stock.

Easy Return For many countries, we offer a discounted return label

- Convenient payment: Advance payment, PayPal, credit card, cash on delivery, Sofort Überweisung & collection

Pay securely

Advance payment – the traditional method of payment

Cash on delivery - payment takes place at your front door.

Credit card - the convenient & fast method of payment.

PayPal – the most secure & fast method of payment

Sofort Banking - pay easily and securely with your standard online

banking details (PIN/TAN).

Collection: place a non-binding order online, then pick it up and pay in a shop

Hotline +49 (0) 2405 4950050
Mon - Fri 9 am - 6 pm
Saturday 10 am - 4 pm