When will I receive my order?
Parts & Accessories orders that are placed before 1 pm are estimated to be delivered the next working day. More delivery info here.
For example, if you place an order before 1 pm on Wednesday, we'll aim to get this out that same day for estimated delivery on Thursday.
If, for example, you place your order after 1 pm on a Friday, or at the weekend, we'll aim to dispatch on Monday for estimated delivery on Tuesday.
Do you deliver outside of the UK?
We deliver to over 150 countries worldwide. Please add any items you require to the basket; the shipping to your destination is calculated at the checkout.
You can learn more about delivery information here. We have a separate page with estimated international delivery times.
Due to restrictions, there are some items we can't deliver internationally (battery packs and aerosols). These items are clearly stated on each product page.
Why can't I purchase some items?
Some certain products we hold exclusively to support our bike customers (those who purchase their bike directly from us).
When you purchase your bike directly from us, your account is unlocked for quick access to order these spares, should you need them.
Purchased from us, but don't see the option to 'Add to Cart'? Please get in touch and our team will be able to assist.
Description
203mm Shimano RT-CL800 Ice Tech FREEZA Disc Brake rotor with internal magnet lockring
The Shimano RT-CL800LJ is a high-performance 203mm Centre Lock disc brake rotor, an Ultegra/XT-level component. The "LJ" typically denotes the 203mm diameter (L) and an internal lockring with an integrated speed magnet (J) for e-bike/STEPS systems. It features ICE TECHNOLOGIES FREEZA, a three-layer stainless steel/aluminium sandwich construction and radiator fins that significantly reduce heat build up by up to 50'C. This superior heat management ensures consistent, powerful, and quiet braking, minimizing fade and extending pad life.
Features:
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Premium Heat Management: These rotors, classified at the XT/Ultegra-level, employ an innovative stainless steel/aluminium three-layer sandwich construction to actively manage thermal energy, ensuring consistent and powerful stopping performance throughout your ride.
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Significant Temperature Reduction: The composite structure, featuring an aluminium core clad between steel layers, facilitates rapid heat dissipation. This design can lower the rotor surface temperature by approximately 50'C.
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Enhanced System Performance: When paired with Ice-Tech brake pads, this thermal efficiency can drop peak temperatures from around 400'C to 300'C, resulting in dramatic improvements across overall braking function.
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FREEZA Cooling Fins: The central alloy section is designed to extend beyond the braking track, forming cooling fins that maximize air exposure and enhance the rotor's cooling capacity.
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Improved Longevity and Quiet Operation: Superior heat dispersion minimizes brake fade and substantially extends the service life of the brake pads, while also contributing to reduced braking noise.
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Secure Center Lock Design: Utilizing the established Shimano Center Lock mounting system, these rotors are lightweight, rigid, and durable, offering a strong, secure fit with a simple installation process.
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Optimized Braking Track: The precisely machined braking surface not only promotes effective cooling during intense use but also efficiently clears mud and debris, maintaining performance in adverse conditions.
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Lightweight, Rigid Support: A large aluminium spider forms a highly rigid and low-weight structure, providing steadfast support for the external rotor ring.
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High-Performance Finish: The braking surface receives a super-polished treatment, which contributes to exceptionally smooth and reliable stopping power.
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Comprehensive Sizing and Lockring Options: Available sizes include 203mm, 180mm, 160mm, and 140mm. Lockring styles are offered in internal, external, or internal with an integrated speed magnet to suit various frame types and e-bike applications.
Next business day UK mainland delivery on parts & accessories
NEXT DAY DELIVERY
Parts & accessories ordered with a bike will arrive fitted where possible
WE FIT PARTS
Parts & accessories dispatched same day if ordered before 1pm
SAME DAY DISPATCH
We deliver electric bike accessories to over 150 countries worldwide
WORLDWIDE DELIVERY