Product Colors and Sizes
Mountain Bike Shorts ST 100
Free returns
Free shipping over $30
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Features
Resistant to wild vegetation
The "warp and weft" fabric withstands rubbing and snags.
Seat comfort
Preformed foam pad. The seams are positioned to prevent chafing.
Freedom of movement
Enjoy the wide cut, stretch fabric, and elasticated waist.
Breathability
With undershorts that effectively wick away perspiration.
Pockets
Take everything you need in the flap pocket on the right thigh.
Product Lifestyle Image Gallery
Image Gallery
Product Customer Reviews
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Recently lost lots of weight cycling, so ordered XL, which supposed were upto 4" too big, but couldn't even get them past my thighs. These are definitely not the right sizes in the size chart!!
excellent padding, and really nice fit. a very good buy, excellent value for money.
I’ve started using my bike more at the moment as something to do so thought I’d invest in some shorts for the padding more than anything. I went on and checked the sizes and it said I needed a Large pair, which is what I ordered. However, when they arrived they are way too small! There’s not extra give to the waist band and they’re far too small to even pass my knees properly. Other than size they seem to be really good material feels strong and durable, under shorts feel good and the padding is decently thick. I’d recommend but you need to order a size or two larger I’d suggest! Shame really especially as the larger sizes are currently out of stock and there’s a pandemic so god knows when they’ll be back in.
Purchased this product to use mountain biking...comfortable and functional at a great price. Recommend
Needs a little more support towards the back
Great cycling shorts with good comfort and fit. Foam padding is good enough for 1 hour rides.
THE SIZES ARE MILES OUT! I looked at the sizing which said 36" waist would be a medium - I was surprised as usually I'm an XL - shorts arrived and it says on the label even states 93-98cm (37-39inches) - are you having a laugh? A child would struggle to get these on - how have you got your sizing so so so wrong? Are you going to refund my postage? I made every effort to select the correct size - but your information is miles off!
For some reason, the online size guide uses the hips and not the waist for it's measurements.
If you this is not clear enough (and I don't think it is), please don't hesitate to return them to us.
Regards,
Peter, Cycling Manager, DECATHLON
The quality of this product was excellent. Good for my cycling activity.
Thank you for taking the time to write us a review regarding our product.
In Decathlon, we believe that to get this kind of information from our users is the best way to improve what we are doing.
We are glad that you are satisfied with our products :)
Do check out more variety of our products at Decathlon.sg
Again, thank you for the feedback, don't hesitate to come down to one of our stores in Singapore.
It will be with big pleasure that we will welcome you.
See ya! :)
BE SPORTY, STAY HEALTHY!
ASHLEY
Sports Leader | Decathlon Singapore Lab
It is a good one if you are riding for like 1hour. Won't recommend for long distance ride as the foam pad wont help much
I use these whilst riding my road bike. I find them comfortable and not as restricting as my normal cycling shorts.
Best for long commuting and racing
Good short i like it:)
The product's quality is very good. The cushion is very comfortable for long rides. And it is easy to wash and dry.
Very comfortable
Thanks for sharing your thoughts on our ST 100 Mountain Bike Shorts, we're glad you enjoyed using it!
Do head down to any Decathlon experience store to check out what other mountain biking shorts we have on offer.
Hope to see you soon!
Your Friendly Neighbourhood Bicycle Guy,
Nicolas
Sport Leader, B'Twin - Decathlon SG Lab
Size Guide
Additional Product Information
Composition
Main fabric
- 100% Polyester cationic
Inner fabric
- 84% Polyester cationic
- 16% Spandex
Padding
- 56% Polyester cationic
- 40% Polyurethane
- 4% Cotton
Cycling shorts, the mountain bike rider's kilt
Don't forget: you wear cycling shorts without underwear. Why? Wearing underwear risks causing irritation. Your skin can rub against the seams and elastic of your underwear. Chafing, shearing, all combined with perspiration (heat + humidity)... this is quite the recipe for infections. That is why we design our shorts with anti-bacterial pads. Dare to wear shorts without underwear!
Our care tips
Machine wash inside out on a synthetics cycle at 86°F. Do not use too much detergent, and do not use fabric softener. It is best dried on a hanger in a warm, well-ventilated place.
Origin
Imported
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.
Satisfaction Guaranteed
Free Shipping Over $30
Exceptions Apply
Free In-Store Pickup
Free One Year Returns
Exceptions Apply
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For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.
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Research and development
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State-of-the-art production processes
minimize manufacturing costs
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Mountain Bike Shorts ST 100
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
| Weight Thresholds | Shipping within California | Shipping outside of California |
|---|---|---|
| > 9 lbs | $20.00 | $25.00 |
| > 30 lbs | $50.00 | $65.00 |
| > 100 lbs | $100.00 | $125.00 |
| > 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.