Description
Wide trail rims that change the way you ride with thickness
The KOM Tough i40 is WTB's durable wide rim for hard trails, enduro, and even bikepacking.
It is the most volume-oriented model in the series, designed to be "bumped and used".
The material used is high-strength 6069 aluminum for both impact resistance and weight balance. In addition, the internal Dual I-Beam construction increases the rigidity and durability of the entire rim, providing a solid and stable feel even on rocky or rough surfaces.
The wide design with an inner width of 40mm is a good match for 2.8 to 3.0 inch class plus tires. The tire's volume is maximized to prevent swaying even at low pressure, providing high traction and a secure driving feel.
WTB's unique TCS 2.0 + Solid Strip construction makes tubeless setup easy and reliable. From everyday trail riding to extreme races and long distance rides with luggage, you can use this bike with confidence in any situation.
[SPEC]
Material: 6069 aluminum
Inner width: 40mm
Outer width: approx. 44mm
Rim height: approx. 18mm approx.
Number of holes: 32H
Tubeless: Compatible (TCS 2.0 / Solid Strip)
Tire: 2.8"-3.0" recommended
Applications: Trail / Enduro / Gravity / Bikepacking
Weight: Approx. 630-650g
- Orders are shipped within 1–2 business days after payment is confirmed. Orders placed by 10:00 AM are generally shipped the same day.
- Messenger delivery is available within Nagoya City only (excluding complete bikes and framesets).
- We ship every day from Monday through Sunday, except on temporary closure days.
- Shipping destinations: throughout Japan and worldwide.
- Shipment may be delayed depending on credit card processing. If you would like to request a delivery date or time, please add a note in your cart.
- All orders are shipped from Circles.
- For damage or loss during transit, please contact the carrier.
Complete Bike Shipping within Japan
- A shipping fee of ¥9,900 (tax included) applies to complete bikes. Additional charges may apply for Okinawa and remote islands.
- After purchase, we perform a final inspection before shipping. Please allow 1–2 weeks in some cases.
- For packing, some parts may be removed. We strongly recommend having the bike reassembled and checked by your local bicycle shop before riding.
- We will contact you by email with delivery details.
- Products are also sold in-store, so availability may change before the order is finalized.
Frameset Shipping within Japan
- Flat-rate shipping within Japan: ¥5,500 (tax included). Additional charges may apply for Okinawa and remote islands.
- Shipping rates for OMNIUM framesets and complete bikes differ.
- We will contact you by email with delivery details.
- Facing and tapping preparation for framesets purchased from Circles is available at no additional charge. Details will be provided after purchase.
- Headset and bottom bracket installation are also available for an additional labor fee. Please contact us if required.
Custom & Stock Wheel Shipping within Japan
- A shipping fee of ¥2,000 (tax included) applies. Additional charges may apply for Okinawa and remote islands.
- Stock wheels undergo a final inspection by a mechanic before shipping. Please allow approximately 3 business days for dispatch.
For international orders, shipping costs vary by destination. Please check the amount shown at checkout.