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Alpinestars Summer Tech Race Bottom

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Alpinestars Summer Tech Race Bottom 

Alpinestars Summer Tech Race Bottom keeps you nice and cool underneath your riding gear or race suit by wicking away moisture and promoting evaporation. Flatlock seams and the stretch Coldtrack fabric means you'll be comfortable all day long. 


  • Cut for race use
  • Designed for warm weather riding
  • Coldtack fabric construction
  • Micro profrated insert panel for comfort and breathablity
  • Ergonomic flat lock seam construction
  • Relaxed fit design for comfort
  • Printed Astar logo

Alpinestars Men's Base Layer Sizing

Euro Alpha US Pant Size Chest (cm) Waist (cm) Hips (cm) Thigh (cm) Inseam (cm) Arm (cm) Height (cm)
44 XS 28 86-90 72-76 87-91 52-53 75-76 53-54 164-167
46 SM 30 90-94 76-80 91-95 54-55 77-78 55-56 168-171
48 SM-MD 32 94-98 80-84 95-99 56-57 79-80 57-58 172-175
50 MD-LG 34 98-102 84-88 99-103 58-59 81-82 59-60 176-179
52 LG 36 102-106 88-92 103-107 60-61 83-84 61-62 180-183
54 XL 38 106-110 92-96 107-111 62-63 85-86 63-64 184-187
56 XL-2XL 40 110-114 96-100 111-115 64-65 87-88 65-66 188-191
58 2XL 42 114-118 100-104 115-119 66-67 89-90 67-68 192-195

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

How To Measure

C Chest Measure around the fullest part of your chest, under the armpits, keeping the measuring tape parallel to the ground.
W Waist Measure around your natural waistline, around the top of the hip bones, inline with the navel while keeping the measuring tape parallel to the ground.
HP Hips Measure the circumference, from pelvic bone to pelvic bone, at the widest part of your hips below the waist.
I Inseam Measure from the highest point of your crotch down to your ankle, along your inner leg.
H Height With no shoes on, stand with your back against a wall and your feet together. Measure from the floor to the top of your head.
A Arm (Shoulder to Wrist) Standing up straight with your arms at your sides, measure from the Acromion or summit of your shoulder, down to your wrist bone, along the outside of the arm.
T Thigh Measure the circumference of your thighs at the widest point, while in a seated position, with your knees bent to a 90° angle.
Product Style RevZilla Item # Manufacturer Product # Availability
Black / SM 304055 475338-10-S/29400062 Available: Requires 1-5 business days lead time prior to shipment
Black / MD 304056 475338-10-M/29400063 Available: Requires 1-5 business days lead time prior to shipment
Black / LG 304057 475338-10-L/29400064 Out of Stock
Black / XL 304058 475338-10-XL/29400065 Available: Requires 1-5 business days lead time prior to shipment
Black / 2XL 304059 475338-10-2X/29400066 In Stock: Ships within 24 hours
Black / 3XL 304060 475338-10-3X/29400067 Out of Stock


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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.


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.

Write a Product Review for a chance to win our monthly $100 giveaways.
Alpinestars Summer Tech Race Bottom 4 5 3 3
A "Can't Do Without" Piece of Gear I swear by these things. We are in the Summer cycle here and it has been 80 + every day for almost 3 weeks now. The Tech Race bottoms and tops are comfortable, do an excellent job of whicking moisture away from you and help regulate your core temperature. They also make it a snap to take your outer gear on or off, especially leathers! I have enough of them to rotate as I ride every day, because I don't ride without 'em! Best to hand wash them and then just hang 'em up; they dry quickly, and if done this way they last longer. Keep them away from Velcro! DO this and you will be golden. July 31, 2013
Weird dimensions, NO FLY! Great to find long tights to be worn under leathers, and meant for hot temperature. But fit is strange, especially in area were legs meet groin, and THERE IS NO FLY! June 17, 2013
Great Product I purchased the matching top and it was excellent.(I left a review on that item also). I had originaly purchased the summer bottoms in Md/Lg which ended up being to small.Returned them for the summer race tech bottoms in Xl which have worked out great. I can't say much about how they will last but if you don't get to ruff with them taking them on and off I think they would last a good while.Everybody takes care of and treats their stuff differently.The change in wearing, and mostly getting in an out of my suit is great.It was muggy and 90 here today and the base/layer did great in my opinion. The description for the race tech summer base/layer is incorrect on here it list them as relax fit but they are a compression fit to help your muscles.I went to alpinestars web and got the correct info.I informed the person that I ordered from about the wrong info for the product but nothing has been changed as of yet.So check it out for yourself.I guess the guy I talked to didn't believe my info.I used the part numbers to get the correct description. Return was easy and money was returned to my card very quick. May 4, 2012
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