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400-Mile™ Cycling Short*

  • 18500
  • 42 reviews

See size chart


Emilio gave these bicycling shorts and bibs the "400-Mile" name from product testing consisting of 400 miles over 4 days. His logic was that many shorts feel fine for 100+ mile rides. The real question is how does that saddle feel when you get on the bike the next morning for another 100 miles...and the next morning? This was the inspiration for the design, the pad, and the name.

Sizing: Please refer to the size chart button above for sizing guidance. 
Fit Type:
Fit Note
Please do not assume your size, please use our size chart. If in doubt, email questions to

Features and Benefits:

  • We sewed the 14mm 400-Mile™ Pad into the short, versus on top of the short. This allows the pad to stretch more, and float; which means it can be used as a race piece in a triathlon. On the bike, the pad stretches with the short and follows your skin as it moves with every pedal stroke, eliminating the friction that can cause irritation or rashes.
  • Seamless inner thigh eliminates friction against the saddle and thighs
  • 11-panel bike short made of Forza Compressor fabric ensures a perfect fit, and targeted muscle support 
  • 3-inch Mobius™ Comfort Compression leg bands keep shorts in place without excess squeezing (no elastic!)
  • Hi-rise, elastic waist and adjustable drawstring keeps the short up and protects you from low back sun exposure
  • 3 pockets: one on each outer thigh and one center back pocket that fit cell phones, smart phones, fuel packets, and most sunglasses
  • Curvilinear™ seamlines and contrast flatstitch highlight panel construction, create an attractive appearance and are extremely durable
  • This environmentally-friendly innovation is completely free of solvents
  • Not recommended for repeated use in a chlorinated pool
  • Made in USA

Inseam lengths:
Note  - Shorter Leg Length than other brands: Have you seen the length of the shorts that riders have been wearing in Europe lately, especially in the Grand Tours? As opposed to most brands here in the states, which come just above the knees, our 400-Mile Shorts are comfortably shorter. Our inseam is similar to those currently used by the pros in the Grand Tours. They have no gripper elastic, yet stay in place and do not bind the legs.

  •      Small: 7.75" (19.69cm)
  •      Medium: 8.25" (20.96cm)
  •      Large: 8.75" (22.23cm)
  •      XLarge: 9.25" (23.50cm)

Outseam lengths:

  •      Small: 16" (40.64cm)
  •      Medium: 17" (43.18cm)
  •      Large: 18" (45.72cm)
  •      XLarge: 19" (48.26cm)

Front Rise (measurement from center pad up to the top of the waistband):

  •      Small: 9"
  •      Medium: 9.5"
  •      Large: 10"
  •      XLarge: 10.5"

Rear Rise (measurement from center pad up to the backside of the waistband):

  •      Small: 15"
  •      Medium: 15.5"
  •      Large: 16"
  •      XLarge: 16.5"


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Customer Reviews
4.9 Based on 42 Reviews
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Filter Reviews:
gregory b.
United States United States
Rock solid pair of shorts

These shorts are made rock solid and are bomb proof. I've done about 120 miles in the week after getting them and they fit well and are very comfy (I do use a bit of Chamois Butt'r). My only complaint is the 14mm pad feels bulky and is really more than I need for 120 miles a week. I'll bump up to 200 miles per week by the end of the summer in preparation for an annual 1/2 iron event, so maybe they'll be more appreciated by then. I truly think for me, the Riviera is the perfect short for the miles I do and the triathlons I train for but these shorts definitely belong in my tool box.

Shane W.
United States United States
Best shorts there are!

Love these shorts. Mountain bike no or road biking; they’re comfortable and definitely in it for the long haul.

Mike H.
Canada Canada
Large fit leading to sub-spectacular performance, Costly to purchase

Comfort: I ordered these thinking that even though they are expensive (over $250 local dollars) that they might make the indoor training a bit more comfortable but I find that my Zoot tri-shorts are still better, sorry. See Size below. Construction: the shorts appear well made, all the seams are good. Much better than many for certain. Size: The sizing is generous, I am in the low end of the M size according to the size chart and they don't grip my legs very well and end up riding up so the leg material bunches up and abrades my skin (exciting in the shower after). I would recommend going with a size smaller if you are in the low end of a size according to the size chart. Shipping: Could be due to the current situation, but from order to delivery it was over a month. And by that time the price was reduced 25% (about $66 local $) which would have just paid for the customs charge. With the large fit I don't expect to be wearing these which is frustrating but the PITA and cost of sending something back to the USA then more customs charges just makes it not worth it.

De Soto Sport

Hi Mark, Thanks for your review. We would have gladly recommended a size to you had you simply written us for assistance! We help people everyday and we have a 99.98% success rate and getting people in the correct size. In order to exchange these shorts for a smaller size you can simply pay for shipping and mark on the package that you are “returning this product to the country of origin.” That way you will not incur any customs to return them, and we will then send them to you as a replacement product for which you have already paid customs. As for your complaint about the exchange rate, we cannot offer any solution for that as I believe you were aware of this at the time you made the decision to purchase from our website. Please contact me if you have any other questions. Kind regards, Emilio

Patrick h.
United States United States
400 Mile Cycle Shorts

Hands down most comfortable cycling shorts available. Treat yourself and you’ll never buy anything else. Well done DeSoto!

United States United States

Comfortable as always. Still need triathlon shorts size to match bike shorts size. Still need the tri and bike shorts to be much longer. Short shorts are not useful in many ways.


  Height Weight Waist Chest Hips
X-Small < 5'6" in / <168 cm 135 lbs / 61 kg 22”-24” in / 56-61 cm < 37” in / < 94 cm
Small 5’6”-5’8” in / 168-173 cm 145 lbs / 66 kg 24”-27” in / 61-69 cm 37”-39” in / 94-99 cm < 34" in  / < 86 cm
Medium 5'9" in / 175-180 cm 165 lbs / 75 kg 27”-32” in / 69-81 cm 39”-42” in / 99-107 cm 34"-38" in  / 86-96 cm
Large 6'0" in / 183-188 cm 195 lbs / 88 kg 32”-35” in / 81-89 cm 42”-45” in / 107-114 cm 38"-42" in / 96-106 cm
X-Large 6'2" in / 191-196 cm 215 lbs / 98 kg 35”-41” in / 89-104 cm 45”-48” in / 114-122 cm 42"-47" in / 106-119 cm
XX-Large 6'5" in / 197 cm+ 235 lbs / 107 kg 42” in +  / 105 cm + 49” in + / 123 cm + 48" in + / 121 cm +


The size chart above should serve as a general guide. If you would like assistance in determining the proper size, please send the following information to

WEIGHT - Accuracy helps us provide a more accurate size for you.
CHEST - Fullest part of breast, measured as the largest part of circumference right over the pectoral muscle.
WAIST -  Circumference measured at the belly-button line - this is NOT the same as your pants waist size.
HIPS - Circumference measured at the widest point, NOT at your hips where your belt may go. Typically this will measure just a few inches below your hip bones and around the largest part of the glutes.

If you do not have a tape measure and you need something to measure with, use a belt, or smart phone power cord, and a ruler.


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