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100% R-Core X Trousers

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Product Description

R-Core X elevates our standard R-Core collection of DH / Enduro riding gear to the next level. 4-way stretch materials along with additional weight-saving materials and treatments result in our lightest weight, highest performing line of riding apparel.

Key Features:

  • DWR Polyester / Spandex 4-way stretch woven fabric for increased comfort.
  • Boa system dial and lace technology for a lightweight, incrementally adjustable waist closure for the ideal fit.
  • Silicone print on inner waistband to minimise slippage.
  • Laser perforations on inseam and behind the knees for increased airflow.
  • Zipper pockets for security of essentials.
  • Stabilization pocket to store device or tool.

Occasionally, without notice, manufacturers change product design and/or specifications.

100% R-Core X Trousers Reviews

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Customer Reviews (1)

Regular cyclist
by Anonymous user on 30/10/2019

Quality is excellent , and are snug fitting , but very comfortable . Love the boa fastening mechanism on these . I feel they are slightly pricy , but I’m not disappointed .

Quality is excellent , and are snug fitting , but very comfortable . Love the boa fastening mechanism on these . I feel they are slightly pricy , but I’m not disappointed .

Close review
4.7 out of 5
Build Quality: 5/5
Performance: 5/5
Value For Money: 4/5

100% Size Guide

100% Size Guide

Men's Clothing Size Chart

* All measurements are in inches
SM / 28 – 30 5’6” – 5’10” 36 – 39 31 – 33 30 1/2 – 31 1/2
MD / 32 5’8” – 5’11” 39 – 41 34 – 35 32
LG / 34 5’10”– 6’ 41 – 43 36 32 1/2
XL / 36 5’10” – 6’1” 43 – 46 38 33
XXL / 38–40 5'11" – 6'3" 46 – 50 40 – 42 33
XXXL / 42 5’11” – 6’3” 50 – 52 44 33

Women's Clothing Size Chart

* All measurements are in inches
SM 5’2” – 5’6”
33 - 35 1/2
25 - 27 1/2
35 1/2 - 38
29 1/2
MD 5’5” – 5’8” 36 - 38 28 - 30
38 1/2 - 40 1/2
LG 5’6”– 5’10" 39 - 40 31 - 32
41 - 42
XL 5’6” – 5'10” 41 - 42 33 - 34
43 - 44
30 1/2

Youth Clothing Size Chart

* All measurements are in inches
SM 46" - 53" 24" - 27" 20" – 22" 17 1/2" - 20 1/2"
MD 54" - 59" 27" - 29" 22" - 24" 20 1/2" - 23"
LG 60" - 64" 29" - 32" 25" - 28" 23" - 24 1/2"
XL 65" - 67" 32" - 34" 28" - 30" 24 1/2" - 25 1/2"


 Updated: 31:05:2019 - <p class=”updated”> Updated: 31:05:2019</p>

Please note, all size information is provided as a guide - if you're unsure or need any further assistance you can call us on 01792 799508 ... we're happy to help!

Freeride/Downhill Trousers


Freeride/Downhill Trousers

Some riders will prefer the feeling of full trousers when hitting the trails or wilderness. They can feel comforting and safer than riding in shorts.

Designed to be ridden on trails where protection from crashing is more important than weather protection. For waterproof trousers see here.


Most trousers use predominantly Nylon or Polyester as the main fabric. To aid stretch and flexibility some will also use elastane or spandex. To help with mishaps on the trail like crashes or brushes with thorns and brambles, many trousers will incorporate fabrics like Kevlar, Ripstop Nylon, 600D Polyester or Cordura for extra strength in vital areas like the knee, seat and outside of the upper leg.

A mountain biker wearing Specialized cycling trousers

DWR finish (weatherproofing)

To add a level of water repellency some trousers are treated with a DWR coating. This is the first line of defence, causing water droplets to bead and run off the fabric. The DWR coating will wear away over time so you will need a Waterproofer such as Nikwax to reinstall performance.

Please see our Technical Fabric Guide for more information.

Elite DH racer Finn Iles wearing MTB trousers during a wet Fort William World Cup


4-way stretch or all-way stretch in the fabric means the trousers can have a slim fit while not restricting movement.

A mountain biker wearing stretchy DH trousers while whipping

Waist/Ankle adjustment

Most freeride/DH trousers will have a tapered ankle to avoid snagging on the bike and keeping a slim fit. Some may have Velcro or zips to adjust the fit around the ankle. Waist adjustment can come in the form of a ratchet-style buckle, Boa fastener, Velcro tabs or simply a button and fly.

Loic Bruni wearing Fox DH trousers at Bike Park Wales


With more trail and endure riders wearing trousers there is a new style of trouser that caters less to the protection of pure DH and more toward long all-mountain days. Lighter fabrics with ventilation or breathable properties aid wicking and are becoming more popular to aid comfort on those big rides.

A downhiller wearing more breathable DH trousers on a hot, sunny day


A modern MTB trouser is much slimmer than the motocross trouser it originated from. A Slim fit helps to reduce wind flap or the risk of snagging on the bike. However, almost all trousers in this category will give room for additional protective layers under the trouser. Articulated or pre-shaped legs designed to be comfortable when riding on the trail, and not feel tight around the knees, especially when wearing pads.

Rachel Atherton wearing Endura DH Trousers which taper at the ankles to avoid snags and improve aerodynamics


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1Fill your basket with everything you want from Tredz and go to the checkout.

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Representative example: If total purchase price is £1,399.00 with a deposit of £139.90 (10%) and your selected term is 36 months Classic Credit (15.9% APR fixed), you would pay £43.55 per month. Total charge for credit will be £308.70 and total amount repayable is £1567.80, subject to terms and status.

Delivery & Guarantee

UK Delivery Information

We are committed to offering fast and free delivery, whether you're ordering bikes, accessories or clothing. Our standard delivery service is FREE in the UK, regardless of the size and on all orders over £20.

Please note that bulky products and bikes shipped to outlying UK regions are excluded from free shipping.

Please note that Pre-Order dates can sometimes change due to updated stock information.

Click here for more UK and international delivery information.

Returns & Warranty

It's easy to return a product with our 365 day, hassle free returns. 

We will give you a full refund or exchange on any item that is returned to us unused/unfitted, in a resaleable condition and in its original packaging (where possible).

Please note: For hygiene reasons, we cannot accept returns of facemasks, undershorts or underwear if the item has been removed/unsealed from its original packaging.

If your item develops a fault or arrives damaged, please contact us first so we can resolve the issue for you as quickly as possible.

For more information please visit our Returns & Warranty page.

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