Product Colors and Sizes

  • Black Friday product
  • New Deal product
  • Cyber Monday product
  • Clearance product
  • Deal product
  • Best Seller product
  • Ecodesign product
  • New product
  • Staff Pick product
  • In The News product
  • Innovation product
  • product

Men's MTB Biking Shorts EXPL 500 - Black

Sale price: $30.00 Regular price: $49.99

With their built-in foam pad (designed for men), these durable shorts absorb vibrations and prevent rubbing and chafingAdvantages: glove attachment, 2 secure pockets and 2 cereal pockets.

Color: Select a color
Size: Select a size
Sale price: $30.00 Regular price: $49.99

Free shipping over $49

Final Sale: No returns or exchanges

Free returns

Free pickup

San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8582728

Product Videos

Product Features

Men's MTB Biking Shorts EXPL 500 - Black | These mountain biking undershorts were designed for your mountain biking rides lasting 3 hours on average.

With their built-in foam pad (designed for men), these durable shorts absorb vibrations and prevent rubbing and chafingAdvantages: glove attachment, 2 secure pockets and 2 cereal pockets.

A photo of the Men's MTB Biking Shorts EXPL 500 - Black in use

Resistant to wild vegetation

The ”warp and weft” fabric withstands rubbing and snags.

Seat comfort

Ergonomic, pre-shaped, foam pad (13 mm)

Freedom of movement

Special ”relaxed” cut and elasticated fabric for riding comfortably.


Elasticated waistband with press stud

Moisture wicking

With undershorts that effectively wick away perspiration.


Take everything you need in the 4 handy pockets.


280 g in size L.

Product Lifestyle Image Gallery

Image Gallery

Men's MTB Biking Shorts EXPL 500 - Black, black Image 1 of 5 

Men's MTB Biking Shorts EXPL 500 - Black, black Image 2 of 5 

Men's MTB Biking Shorts EXPL 500 - Black, black Image 3 of 5 

Men's MTB Biking Shorts EXPL 500 - Black, black Image 4 of 5 

Men's MTB Biking Shorts EXPL 500 - Black, black Image 5 of 5

Questions & Answers

Product Customer Reviews

Skip to reviews
550 Reviews
Write a Review 
Men's MTB Biking Shorts EXPL 500 - Black, black Image 5 of 5
Filtered by reviews Loading reviews…
No correspondence between interior and exterior sizes

The sizes of the pants do not correspond to the inner shorts. I bought the L and the exterior is very good but the interior does not fit. The XL has tight and good culottes, but the pants are huge. I'll have to keep looking.

icon-circle-checkmark verified purchase
Perfect, just one missing...

Perfect, just missing a choice of colors.


They are beautiful and comfortable.

Nothing to complain about… compliant…

Nothing to complain about… consistent with desirable use… excellent value for money.


They could be better. But it's safe

icon-circle-checkmark verified purchase
Size small under shorts…

Small size under shorts impossible to put on


Excellent quality-price product, detachable inner pant, ultra comfort.

icon-circle-checkmark verified purchase
Cycle pants

Pants as such are ok. According to the description, 4 pockets. Usable about only 2. But this is Decathlon's problem overall. They absolutely cannot design pockets. Whether it's trousers for the forest, a jacket for a polo... an acute lack of pockets.

icon-circle-checkmark verified purchase
To see in the…

To see over time

icon-circle-checkmark verified purchase
Very comfortable. Internal protection...

Very comfortable. The interior protection can be removed to make simple shorts.

icon-circle-checkmark verified purchase
Good product, satisfied for...

Good product, satisfied for my Fatbike rides, test on very rocky paths and roads.

icon-circle-checkmark verified purchase

Excellent value for money

icon-circle-checkmark verified purchase
Good resistance to brambles…

Good resistance to brambles and comfortable. The plus: the pocket that allows you to slip in a smartphone

Old receipt !!

I would like to buy a product thinking its new and not find a receipt from a previous sale in the pocket!! Obviously they've not been washed so all manner of thoughts went through my head about cleanliness.

The underpants part is…

The underpants part is very well padded, ensuring great comfort in the saddle. On the other hand, it fits a bit just for me, but I think a size L would have been too big. This is the shorts part that I will criticize the most: the right pocket is too small to put my smartphone (Samsung S20 FE, a very common size these days) + its case easily. It still fits by pulling the fabric a little. But the most negative thing is that this pocket is certainly on the side, but at the back of the thigh rather than in front: the smartphone sometimes hits the saddle when pedaling seated and it is very unpleasant. All in all, my previous Decathlon shorts of this type (with non-removable "fake chamois" briefs) were better designed in terms of pockets, and seemed much more robust (they are still operational after more than 10 years, even if the elastics are dead. I kept the product because I wore the boxers (hygienic reasons), and also because the defects mentioned are not prohibitive. But I would not make the purchase again if I had to do it again.

icon-circle-checkmark verified purchase
Skip to reviews

Additional Product Information


Main fabric: 88.0% Polyester, 12.0% Elastane ; Yoke: 100.0% Polyester ; Main fabric - Inner layer: 87.0% Polyester, 13.0% Elastane ; Back fabric: 63.0% Polyurethane, 6.29% Elastane, 30.71% Polyamide

Sizing information

Our model is wearing a size M top and size M bottoms.He is 1.83 meters tall.

A second skin with comfort to boot.

The pad has been designed for more regular users looking to progress in MTB. The support foam is also soft but more dense. It protects pressure zones for up to 3 hours. The foam is soft and the stretchy outer layer hugs the cyclist's body so the pad can follow their movements. Foam thickness: 13 mmFoam density: 100 KG/m3Foam firmness: 25 KPa


- At the back there's a zip-up pocket for things like keys, credit cards, etc. (14 cm x 7 cm)- There's a zip-up water-repellent pocket on the back of the thigh that's easy to access (even with one hand) and positioned to protect your phone from falls (20 cm x 12 cm).- There are two pockets along your thigh for storing cereal bars (15 cm x 4 cm each).

Keep your gloves to hand

When mountain biking, gloves are often the last thing you put on and the first thing you take off. These shorts have a buckle on the waist so you can keep hold of your gloves without having to rummage around in your pockets. You can snap your ST 100 and ST 500 gloves on them using the press stud to keep them handy at all times.

Care instructions

You can find detailed info on looking after your mountain bike clothing on our website

Product tests

Our team of product designers based at the B'Twin Village in Lille is continuously working to make cycling more comfortable for our users.Our obsession is to create products that meet the specific cycling needs of our users and eliminate hindrances to a good cycling experience.

Product testing

Our engineers always have real riders test all our products in real conditions. These tests round out our lab tests and let us validate all our products before they hit store shelves.

Storage instructions

Store in a clean and dry place.



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs