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- – 6-month term
- – No impact on credit to apply
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Thursday, Nov 12
At a glance
- Condition
- New
- Color
- Flat White
- Size
- X-Large
- Model
- 0817-515
- Weight
- 3.5 lb
- Material
- Polycarbonate (PC)
- Item Type Name
- Sierra Helmet R
- In the box
- helmet
- Warranty
- See Manufacturer
Features 5
- Shell is constructed with ABS
- Weight: 1590G ( 50G)
- Moisture wicking, removable/washable air channeled comfort liner
- Integrated face shield
- Padded chin strap with double-d safety lock
Description
O'NEAL produces motorcycle and cycle gear, parts, apparel and accessories that absolutely offer the best in comfort, quality and protection every time you ride. Security, quality and protection you can trust after nearly 40 years of racing. Features: Shell IIS constructed with ABS - Weight: 1590g ( 50g) - Moisture wicking, removable/washable air channeled comfort liner- Vent holes for optimal ventilation - Integrated face shield- Height adjustable helmet shield - Padded Chin Strap with Double-D safety lock - Meets DOT and ECE 22.05 safety standards - Designed for Street, Enduro, Side by Side and Adventure Bike's- Replacement parts available.
Specs 23
| Color | Flat White |
|---|---|
| Brand | O'NEAL |
| Vehicle Service Type | ATV, PWC, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles |
| Item Weight | 3.5 pounds |
| Material | Polycarbonate (PC) |
| Brand Name | O'NEAL |
| Global Trade Identification Number | 95 |
| Manufacturer | O'Neal |
| Model Name | Sierra R Helmet |
| Item Type Name | Sierra Helmet R |
| Model Number | 0817-515 |
| Number of Items | 1 |
| Manufacturer Part Number | 0817-515 |
| Unit Count | 1 Count |
| Compatible with Vehicle Type | ATV, PWC, off-road-motorcycles, street-cruiser-motorcycles, street-touring-motorcycles |
| Sport Type | Motorcycling |
| Material Type | Polycarbonate (PC) |
| Finish Type | Glossy |
| Shell Type | Hard |
| Certificate Type | DOT |
| Specification Met | FMVSS 218 |
| Shape | Aerodynamic |
| Style Name | Full-face-helmet-style |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Nov 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Learn more about financing & leasing here.
Top Amazon Reviews
Looks great once you get the right size
Color: Flat White
Size: X-Large
I had an issue with my first order because the size I picked didn’t fit me correctly, so I had to exchange it. Once I got the right size, though, I was really happy with it. The helmet looks great in person and the flat white finish gives it a really clean look. It feels solid, the interior padding is comfortable, and once properly fitted it sits securely without feeling awkward. Visibility is good and it doesn’t feel excessively heavy on my head. Definitely make sure you check the sizing carefully before ordering, but after getting the correct size, I have no complaints. It looks awesome and feels like a quality helmet.
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Reviewed in the United States on August 9, 2026 by Rene Gomez
Yes, you need a sun visor
Color: Black/Gray
Size: Large
In my opinion, this helmet hit a home run. I've only had it for a few weeks but the quality seems to far surpass the value. I like the silver/gray color scheme a lot and I love the sun visor. I do wish it had more vents since I live in the heat but it's fine. There is some wind noise but I think that's the nature of the beast. Sometimes there are sacrifices for such a low price but I just don't see it in this particular item. Update#1 As an addition, I am a tweener at 23" - between MD and LG - so I went with the LG. I got it, I wore it around the house and it felt snug; however, after many rides later, it does seem to have broken in to an ever so slightly, loose fit. It's possible a MD would have been a better choice. Update#2 I recently noticed that the screws to the visor were very loose. Get some blue loctite on those before you lose them. Update#3 After some time, the LG does cause unbearable crown pressure. It's mostly loose left to right. Update#4 I bought a MED and confirmed the outer shell and inner padding of both LG and MED are identical in size. They share the same shell and the difference lies in the EPS core. Unfortunately, the MED mostly caused forehead pressure and wasn't the solution to the LG. This is unfortunate dilemma of a tweener.
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Reviewed in the United States on October 8, 2025 by MP
Snug
Color: Gray/Black/Red
Size: Large
First motocross style helmet. My previous helmet years ago was a street bike full face. I sent the first one back because the padding made it way too tight. Ordered an XL and it is very snug also. I’m confident that my head would be protected in a crash. Difficult to get eye glasses on after putting on the helmet. The sunshade thing on top catches quite a bit of air when riding on the highway. I looked into removing it but it is part of the hinge for the shield. The inner tinted sun shield touches my big nose when I drop it down and isn’t dark enough to really help much. The venting seems to work well. Enough air moving to keep the shield from fogging but not enough to dry out my old eyes. The padding seals well around the neck. It has been very comfortable for the autumn riding I’ve been doing. Haven’t used it on any hot days yet. Overall I like this helmet. Good value for the money. Order big if you are between two sizes.
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Reviewed in the United States on December 14, 2023 by SouledOut
Decent for price
Color: Black/Gray
Size: Large
Overall I like the helmet, especially for the price. My head measurement put me right in the middle of large range going by the size chart. It fits perfectly around my head, but the space around my cheeks is very cramped. I think it will break in with use. I don’t like where the d rings are positioned. They are up way too high and in combination with the tight fit it makes the d rings press into my jaw a bit. It’s also a pain to get fastened. I love the sun visor. I wear prescription glasses and they fit in the helmet very well. There’s a space in between pads where the arms of the glasses slide right in. The sun visor is able to deploy over my glasses which is outstanding. The face shield is decent. I like that it clicks closed and seals well. Love the chin curtain. Wind noise is decent. The peak was a little loose out of the box and it rattled at high speed but tightening that down fixed the issue. It looks like there’s not much room for Cardo speakers but I think I can make it work. I can put the helmet on with Bluetooth earbuds on and they stay in place. After it breaks in it should be much better. Overall decent.
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Reviewed in the United States on September 18, 2026 by Phil
Great Helmet!
Color: Gray/Black/Red
Size: XX-Large
Great Helmet!
Reviewed in the United States on September 23, 2026 by Amazon Customer
O’Neal Sierra R. Great quality helmet for the price.
Color: Gray/Black/Red
Size: Medium
O’Neal Sierra R helmet. A light well built helmet. Very comfortable for long periods of time and does well in the higher temps into the 80s -90s. The top vents are not adjustable and don’t close. This helmet does vent well. Open the clear shield and just use the sun visor and lots of air flow! I use this for commuting and for adventure trips. It’s great for trails and on the road. I prefer having a peak to block out low sun and the sun visor. A must for me when commuting. The peak catches some air around 60+ and hums just a little, so installed rubber bushing/washers between it and the factory screws. Helped a little. The peak does not shake or blur vision like the AT960 can when the wind hits just right. I use ear plugs and recommend using them with this helmet at 40+ mph. Ride a T7 with a small windshield extender for reference. Own AT950 and AT960, those are good but heavy after a while. The O’Neal is my go to helmet. So much lighter and more comfortable for me. The clear shield is a little distorted compared to the other two helmets I mentioned but not bad. The sun shield is not as dark either and would prefer it to be darker but helps a lot when down. It doesn’t have speaker cut outs. I made room for comm speakers by putting the speaker under the liner and adjusting till the speaker was in a good spot. Then trace around the speaker and dug just enough out for it. Pretty easy really. I thought for the fit this and the commander 2 was fairly similar. For the price this helmet is great.
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Reviewed in the United States on September 23, 2026 by T-Roy
Well worth it for a big forehead.
Color: Flat Black
Size: Large
I bought this helmet without being able to test fit one. My Mellon has a habit of having helmets press hard on the back of the head and forehead giving me a "it fits ok on the showroom but after 30 minutes on the road I have a splitting headache" scenario. This model has a little extra "length" that works well with the caveman frontal skull lobe I have. :) The visor is slightly oversized giving you a generous field of view while maintaining the motocross coolness look. The only thing Ive had an issue with is the visor vibrates in the wind just right and produces a slight noise on the rear edge where it contacts the top of the helmet. A little electrical tape tucked underneath, a quick touch up with a razor blade and all looks good and functions without a squeak. Padding is excellent. Just be sure to buy an extra visor whole you can, helmets go oyt of style like cell phones so buying an extra lense might not be possible after a season or two.
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Reviewed in the United States on November 23, 2025 by AKnarrowback
You get what you pay for...
Color: Black/Gray
Size: X-Large
I like this helmet, but let's get down to the negatives first. My main gripes are about the D-rings. The ring strap fits through the comfort strap in two places, one up near the base of the helmet where it enters, and one closer to the rings where it exits. The problem is that the ring strap is too short. When you put the helmet on it slides back up into the inside of comfort strap where you cannot grab it. To fix this I had to cut away at the comfort strap (see pictures). The second issue is with the rings themselves. They are a lot smaller than other helmets. This makes securing the D-rings very difficult, and impossible if you're wearing gloves. So basically every time you put this helmet on you are fighting with the rings. Aside from that, the helmet is noticably louder than a standard helmet. This is to be expected as it's a dual sport helmet, but the acoustics seem to magnify all sound. Wearing this helmet makes things louder than if I wasn't wearing a helmet at all. For any distance riding ear plugs are a requirement. For sizing, a lot of comments mentioned going a size up because the helmet runs small. I followed the measurement suggestions and ordered to size up from there. This seems to fit me perfectly. The helmet is very well ventilated. I also think it looks very stylish. The drop down sun visor is a nice addition for the value. Quality seems pretty fair. For what I paid I actually like this helmet, but it's not without its faults.
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Reviewed in the United States on November 7, 2024 by stanton