In EIE, we never stop pushing the limits of carbon rim performance. Today, we are delighted to introduce our in-house developed manufacturing innovation — Ultra-Lightweight Layup Technology, or ULL. Standing as the pinnacle of our innovation, the ULL version delivers an ideal balance of strength, lightweight performance and structural reliability for cyclists.
What Are ULL Version Carbon Rims?
ULL carbon rims are precision-engineered to unlock peak performance while minimizing weight.
Designed for hardcore riders who pursue ultimate lightweight setups and cutting-edge carbon wheel technology, these rims are ready for road, gravel and XC trail riding. Constructed with premium Toray T1100 high-modulus carbon fiber with our proprietary integrated molded spoke hole process, ULL rims set a new benchmark for lightweight construction while maintaining full fiber continuity for an exhilarating ride feel.
How Do We Achieve Lighter Weight Compared to the UL Version?
The UL version adopts a full T800 carbon layup, already an excellent lightweight solution. We took on the challenge when customers asked for lighter rims without compromising the structural integrity of the spoke holes.
After extensive process research and development and precise layup optimization, we present two major innovations: we abandon the conventional CNC drilling for spoke holes and have developed our proprietary Integrated molded spoke hole process, while upgrading the base material to Toray T1100 high-modulus carbon fiber. These two innovations work in tandem to create our brand-new ULL Ultra-Lightweight Layup Technology.
Choose the ULL for lighter wheelsets and snappier, more responsive rides. Custom builds are available for riders chasing the ultimate lightweight wheelset.
1. The standout feature of ULL carbon rims is their lightweight construction. Lighter than standard T700/T800 carbon rims, they help riders accelerate faster, climb with less effort and hold higher speeds on flat ground. Reduced rotational mass improves handling and responsiveness.
2. Despite its ultra-light weight, the ULL rim delivers impressive strength. The integrated molded spoke hole design removes fiber damage caused by post-cure drilling. Continuous carbon fibers around spoke holes greatly reduce cracking and delamination risks on long rides, pairing outstanding durability with an optimized stiffness-to-weight ratio even under aggressive riding.
3. Spoke holes are formed in-mold with stable and precise angles. This ensures perfectly straight spokes, superior wheel dynamic balance and stable, predictable handling.
4. Both of our available ULL rims have gone through tough impact tests. Check the test report below!During the impact test, the A29C30D24WP and ARG50TC32P ULL rims underwent vertical drop impact testing using a 10.5 kg flat steel anvil, with no tyre installed. The A29C30D24WP rim withstands up to 90 J frontal impact and the ARG50TC32P rim withstands up to 95 J. Both rims comply with UCI standards.Check the test vedio below!
1. Rider weight: Recommended for riders weighing less than 90 kg for XC cycling ,max 100kg rider weight for road disc and cx gravel.
2. Carbon weave: Only UD (unidirectional) weave is available since it allows for a lighter layup compared to other types of weave.
3. Cycling Terrain: Suitable only for XC and CX disc gravel riding.
4. Brake Compatibility: As T1100 is not high-temperature epoxy resin system, we do not recommend this version rims for use with rim brakes.
5. Tooling & models: Custom mold development carries substantial costs. At present, this innovative application is available on two rim models: PA29C30D24WP and PARG50TC32P, engineered for both mountain and road riding. We are continuously expanding our lineup and will roll out this technology to more rim models in the future. Stay tuned!
How to Purchase rim with ULL version?
1.To access all product pages, click on any product type. On the left side, at the bottom of the filter box, you will find an option labeled "SPECIFIC."
2.Click on it to select products available for ULL purchase. After selecting the relevant products, click on the product page.Then click "Customize&Buy Wheelset" or "Customize&Buy Rims" according to your demand.
