Discontinued Product!

The Alpinestars Sierra Gore-Tex XCR Boots (Size 6.5 Only)
has been discontinued and will not be returning
Replacement Suggestion:
Alpinestars Gore-Tex Gear
Out of Stock
Alpinestars Sierra Gore-Tex XCR Boots (Size 6.5 Only)
  • Alpinestars Sierra Gore-Tex XCR Boots (Size 6.5 Only) - Black/Brown

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Video Review

Alpinestars Sierra Gore-Tex XCR Boots (Size 6.5 Only) Videos

Alpinestars Sierra Gore-Tex XCR Boots

Incorporating the highly breathable and waterproof XCR membrane from GORE-TEX, the Alpinestars Sierra shoe is extremely durable and rugged, offering protective features built into its subtle outdoors design. With a technically constructed upper and Alpinestars exclusive rubber compound sole the Sierra is constructed to handle extreme temperature conditions.


  • Technical main upper construction featuring combined microfiber, durable synthetic leather panels on the heel and toe, breathable mesh inserts and TPU reinforcements for an extremely comfortable and hard-wearing boot
  • Ergonomic forefoot shaping design for better grip on the bike’s controls
  • Padding on tongue and collar provides high levels of comfort and fit around the ankle and instep
  • 3D mesh lining is strategically placed on the collar and top tongue area to provide high levels of breathability
  • Incorporates GORE-TEX waterproof and extremely breathable performance membrane XCR which is optimized for use in temperature extremes, on or off the bike
  • Flex insert on Achilles heel provides riding comfort and maneuverability
  • Secure, personalized and convenient closure fit thanks to lacing system and adjustable PU-tipped Velcro® strap across lower shin
  • Double density TPU ankle protector disks are layered under the upper for excellent protection against knocks
  • External TPU shift pad for durability and grip on bike’s controls
  • External TPR guards on the lateral and medial side help protect against abrasion and knocks
  • Internal toe box and heel counter are layered under the upper for more ergonomic design
  • Alpinestars exclusive rubber compound sole features performance sculpturing for excellent grip, flex and durability
  • Removable and replaceable EVA and Lycra foot-bed is anatomically profiled for added comfort and support
  • Hi-Vis reflective panel on rear improves visibility of rider
Bang For The Buck
3.9 / 5
Protection & Durability
4.2 / 5
4.3 / 5
4.2 / 5
4.5 / 5
Air Flow
3.8 / 5

Alpinestars Men's Boot & Shoe Sizing

Euro USA
38 6
38.5 6.5
39 7
40 7.5
40.5 8
41 8.5
42 9
42.5 9.5
43 10
43.5 10.5
44 11
45 11.5
45.5 12
46 12.5
47 13
47.5 13.5
48 14

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How To Measure

FT Feet What size shoe do you wear?
Product Style RevZilla Item # Manufacturer Product # Availability
Black/Brown / 6.5 947102 2338014848-6.5 Out of Stock


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The Sierra is now the fraternal twin of something like the CR4 which is much more of a hiking inspired cortex boot.  The Sierra almost jokingly we call a tech commuter boot from Alpinestars because you're around $200, you're getting a good mix of protection, you're getting Gore-Tex which is waterproof breathable guaranteed for life.  The highest degree of waterproofness but if we really look at it, it's really kind of three season warm weather.  You have these mesh panels.  It's not going to be as insulated from the elements.  I really think it's a spring, summer, fall, dry and wet weather boot that has a touring flavor to it.  All in, I'm a fan of it.  It replaces something called the Africa which was part of the Alpinestars collection we saw previously and didn't quite know what it wanted to be.

This guy is much more defined in its placement as really this multi-season tech touring, tech commuting boot and it does have a less than stiff.  So I'm going to give it about a seven on the scale.  It's not really a hiking boot like that CR4 but it's going to be good enough to rock under our pair of jeans.  You could walk around it all day.  Now, fit side, no issues here.  Alpinestars gets the American market.  I find that I'm a 43 in it. I'm about a 9, 9 1/2 in a pair of Nike sneakers.  Again that's typically where I fall in Alpinestars race boots, Alpinestars touring boots.  Again, no issues there.  Remember we'll ship for free.  Let me hear your opinion too of the Alpinestars Sierra GTX.  Subscribe to us at RevZilla TV by clicking right there and leaving your comments or questions and your feedback.  Now diving into the boot itself, synthetic suede kind of pulling it all together.  You're going to see TPR at the toe moving in a lateral side along the edge.  Great low side protection.  A nice big TPR stitched on here as well on a different style with an A Star's logo. 

Moving in the back, hell counter that comes up, TPR reinforced ankle and heel cockpit which is a nice touch and looking up around the ankle great malleolus hard part.  That's that Fred Flintstone bone on the lateral side, on the medial side again encapsulated with leather and you also have this big strap that's not even covering any laces that just ties everything at the top.  It's going to keep on your foot in case of a crash scenario.  Now looking at the lace, reflectivity baked into the eyelet.  They are low profile and rounded.  I'd love to see them a little bit more covered.  But again then you'd be taken away from that reflectivity.  And then moving into your shift panel, notice duel recess stitching area of TPR, great for your controls.  And it does have a decently reinforced toe box.  I think they could have beef it up a little further but again you're looking right around the $200 mark.  So again they have to make some tradeoffs.

Mesh on the inside and remember behind that mesh it's not direct venting.  It's the Gore-Tex liner so it vents the Gore-Tex liner promoting faster evaporation.  So especially if your foot sweats in the summer time, this is going to be an awesome boot that's still waterproof but isn't going to get your foot wet if you get caught in a cloud burst.  Moving on to the guts here down into the sole, it is a two way grip sole.  Again flexible.  Really kind of an on the bike off the bike commuter style sole.