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ROCKRIDER ST 500 Padded Mountain Bike Under-Short - Black

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£12.99 -%
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* From To

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* From and limited stock
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Comfy and supportive clothing is essential when mountain biking, so our designers have developed these Rockrider ST500 men’s undershorts for rides of two to three hours. Their key feature is an ergonomic 12 mm foam pad, which not only makes the saddle more comfortable, but also reduces rubbing and chafing.
  • Elastic and gel bands keep undershorts in place
  • Airy mesh fabric wicks away perspiration
  • Compatible with men’s mountain-bike shorts

Technical Information

Are these undershorts supportive? We explain all.

Bibless undershorts can be much more practical. But do you get enough support?
To guarantee the support you need, even without straps, we have made a pair of undershorts that hugs your body just like boxers.
The elasticated waistband adapts to fit you and stays in place with no adjustment needed.
And to stop the shorts riding up as you cycle along, there are gel bands at the bottom to keep your undershorts just above your knee.

A second skin with comfort to boot.

Feeling comfortable in the saddle is a top priority when you're on the go for several hours!
For maximum comfort, even when you're hurtling down mountain bike trails, your undershorts have an ergonomic 12 mm foam pad.
Besides making the saddle more comfortable, the pad reduces rubbing so you won't get chafed.

Several layers for less heat?

In the middle of summer in particular, you need to get rid of heat quickly.
That's why the ST 500 undershorts have a breathable foam pad and mesh fabric, to wick away perspiration quickly.
The result is that you don't warm up, even though you're wearing two layers of shorts.

How our ideas and your feedback made these undershorts.

We entrusted our mountain biking team with the task of designing bibless undershorts that give you a good balance between simplicity and support.
It took five people 18 months of studying, designing, prototyping and running lab tests...
And we also had your feedback.
We travelled to France and Italy to meet up with around 30 intermediate mountain bikers and run a series of functional tests in real situations.
The result was a product that's suited to your sport and meets your needs!

Shorts, undershorts, pad? Here are our tips!

Undershorts are to MTB what kilts are to Scotland: you wear them against your skin!
To avoid chafing, we therefore recommend changing them and washing them as if they were underwear.
And when you're riding, your shorts and undershorts should never be attached.
Why? Because each has their own role to play:
- The undershorts stay in place for comfort and support.
- The shorts move with you for better freedom as you cycle along.

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Composition / advice

Main fabric
100.00% Polyester
Padding - Inner fabric
100.00% Polyester
Padding - Outer fabric
80.00% Polyamide, 20.00% Elasthane
Care instructions: Wash before first use.
Washing instructions
Machine wash - 30° max - normal
Machine wash - 30° max - normal
Do not bleach
Do not bleach
Do not tumble dry
Do not tumble dry
Do not iron
Do not iron
Do not dry-clean
Do not dry-clean

Our commitments

Test Product 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.
Guarantee : 2 Years

Product benefits

Sitting comfort Ride comfortably for up to 3 hours thanks to the ergonomic 12 mm foam pad.
Moisture management Stay dry: the airy mesh fabric quickly wicks perspiration.
Stability More support for more comfort thanks to the elastic band and gel bands.
Compatibility You just need one: these undershorts are compatible with our men's MTB shorts.

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