Free Shipping Over $39.99

Orders $39.99 or more ship free within the contiguous U.S.

Free Shipping Policy

No Restock Fees

Doesn't fit? Don't love it?

Return any unused item within 30 days for a full refund.

No-Hassle Returns

  1. Obtain an RA number
  2. Package your product
  3. Send it back to us!
Return Policy

Price Match Guarantee

Found it for less?

RevZilla will match any advertised price on new merchandise available through another authorized U.S. dealer.

Price Match Policy

Elite Service Rating

Our goal is to provide the best possible shopping experience to every enthusiast who visits RevZilla.

See what our customers are saying about us:

Customer Reviews

ZillaCash Rewards

The ZillaCash rewards program is very straightforward - if you have a RevZilla account, you may already be taking advantage of ZillaCash rewards. Review the following guidelines to see how easy it is to maximize your rewards and put your ZillaCash to work for you.

  • Earn and redeem ZillaCash credit automatically with each order - no fine print, no strings attached, and no hoops to jump through to cash in.
  • All you need is a RevZilla account to start earning - Simply log in each time you shop with RevZilla and we’ll take care of the rest, keeping more money in your pocket just for shopping with us.
  • Earn $5 for Each $100 You Spend on eligible products - up to a maximum of $30 ZillaCash per order for orders totaling $600 or more. Any ZillaCash you earn is automatically applied to the next purchase, so you can sit back, enjoy the ride and feel the savings blow through your hair.
Learn More About ZillaCash

Product Details

Alpinestars Smart Guard Knee Protection Kit

Smart Guard knee armor fits Alpinestars leather or textile pants with knee armor pockets.

Features:

  • CE approved
  • Sold as a pair
Product Style RevZilla Item # MFR. Product # Availability
Product Style Men's RevZilla Item #616838 MFR. Product #652-100-10/27040220 AvailabilityAvailable: Requires 1-3 business days of lead time prior to shipment
Product Style Women's RevZilla Item #616837 MFR. Product #651-100-10/27040219 AvailabilityIn Stock: Ships within 24 hours

Shipping

Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.

Returns

If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Product Description
Part Numbers
Tap To View Part Numbers
Shipping & Returns
Tap To View Shipping & Returns Details

Reviews & Questions

3.0 / 5.0
3 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
0
2
0
0
1
Bang For The Buck
3.3 / 5
Protection & Durability
3.5 / 5
Features
2.7 / 5
Comfort
3.3 / 5
Style
2.3 / 5
Air Flow
3.0 / 5
Fit
Small
True
Large
Bang For The Buck
4 / 5
Features
4 / 5
Comfort
5 / 5
Style
4 / 5
Air Flow
5 / 5
Comfortable Protection
While, hurray!, I haven't tested the protection this armor provides, it is more comfortable than another brand I had been using; they were stiff. I haven't used the Alpinestars long enough to judge durability.
Knee and elbow pads especially have to be flexible for comfort, and to encourage their use. The other key feature is placement. Some clothing doesn't position the pads where they belong and allows them to move around. The Alpinestars pants keep the knee pads where they should be for maximum protection..
August 6, 2012
Ride:
2012 Harley Davidson Sportster Custom XL1200C
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
Features
3 / 5
Comfort
4 / 5
Style
2 / 5
Air Flow
2 / 5
piece of mind investment
I got these knee inserts for my Astars Axiom denim. though I've only had them for summer riding they do tend to make riding in jeans even hotter. I don't mind the discomfort though because I'd rather sweat it out than risk losing some skin. For $30, it's definitely worth it. Live free and ride smarter!
July 15, 2013
Ride:
2012 Honda CBR250R
Bang For The Buck
1 / 5
Protection & Durability
2 / 5
Features
1 / 5
Comfort
1 / 5
Style
1 / 5
Fit
Small
True
Large
Air Flow
2 / 5
No good
These are flat! If you have flat legs they will be great. Otherwise buy something curved.
January 9, 2017
Purchased
over 3 years ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 7 questions Browse 7 questions and 11 answers
Why did you choose this?
RevZilla Store
size ,brand ,price
herbert l on Oct 23, 2017
Seeking for additional protection to an existing set of Kevlar riding jeans. Alpinestars is a brand that I continue to have a positive experience with. The padding appears to offer the coverage that I required without needing to be precisely placed within the pant's knee protection pocket. Pre-molded armor may offer more protection or may fit better, but would require it to be placed exactly within an armor pocket to be effective.
Rene N on Feb 3, 2016
size ,brand ,price
herbert l on Oct 23, 2017
Slid right into my BMW pants without mod.
brlystad on May 10, 2016
Seeking for additional protection to an existing set of Kevlar riding jeans. Alpinestars is a brand that I continue to have a positive experience with. The padding appears to offer the coverage that I required without needing to be precisely placed within the pant's knee protection pocket. Pre-molded armor may offer more protection or may fit better, but would require it to be placed exactly within an armor pocket to be effective.
Rene N on Feb 3, 2016
this weird alpinestars shape is the only one that will fit properly on my alpinestars outcast jeans. Otherwise i would have bought some D30 or so.
Abel M on Nov 3, 2015
To go with the A Stars air-flo pants. I had to sew a matching armor pocket.
Rick P on Aug 22, 2014
for my jeans
Thomas E on Feb 10, 2014
Slid right into my BMW pants without mod.
brlystad on May 10, 2016
this weird alpinestars shape is the only one that will fit properly on my alpinestars outcast jeans. Otherwise i would have bought some D30 or so.
Abel M on Nov 3, 2015
When installed as knee protectors in pants, which side should be facing out? The tan or the black?
A shopper on Oct 3, 2012
BEST ANSWER: The color of the armor that faces outward is not as important as the ergonomic shape. If you were to draw a line down the center of the pad, you want the wider half on the lateral side of the knee as that would make first contact.
Will these pads fit/work on 5.11 Tactical pants?
A shopper on May 1, 2015
What are the dimensions of the protection? I need to check if the fit the internal pockets of my Sartso killer jeans.
Thanks!
A shopper on Mar 3, 2014
BEST ANSWER: These knee protectors are 14 in.(L) X 8 in.(W). I own a pair of Sartso jeans, I can tell you they are too big, but you can cut them easily (probably voids the warranty). I like this armor a lot because it is very soft, CE certified and there is good coverage. Sartso knee armor pockets are small. I would suggest going to a seamstress and have a bigger pocket put in the jeans. I have had that done (with other pants)and I was happy with the results. It allows you to keep the original size of the armor for better coverage. Just make sure you align the knees correctly. I like this better than the D3O knee armor (9" x 6") because of the better coverage. I have not gone down with this armor to test it, but I have gone down with just temper foam in the knees (what used to come stock in pants) at 20 mph and I was OK. Probably just luck, but this armor is much sturdier. Good luck.
Can I use this as a hip protection using the hip pockets inside Alpinestars pants?
A shopper on Dec 2, 2012
BEST ANSWER: No, the Alpinestars Smart Guard Knee Protection Kit are designed for Alpinestars knee pockets only, and will not fit properly inside hip pockets. You could use the SAS-TEC Replacement Hip Armor, which you can trim to fit inside different pocket sizes and shapes. Please note that while trimming the armor will not compromise the integrity of the armor, it will void the manufacturer's warranty.
Will these fit the Alpinestars Air Flow Mesh pants knee pockets?
Tim O on Jun 22, 2017
How thick are these where they contact the knee?
A C on Aug 31, 2016
3 Customer Reviews
3 3/5
Read All Reviews
6 Questions & 5 Answers
Ask A Question