Enduro's MR 18307 Solid-Lube bearings incorporate an innovative lubricant-infused polymer that eliminates internal cavities where contaminants collect. Constructed with 52100 High-Carbon Chromium alloy races and precision grade 10 balls in deeper grooves, these ABEC-5 bearings maximize contact area for superior durability. The strategic LLU/LLB seal configuration provides optimal protection—robust LLU seals face outward to block environmental elements while lower-friction LLB seals face inward to maintain lubrication integrity, specifically engineered for bicycle hub applications.

Primarily designed for hub applications, this Enduro radial bearing can serve as a pivot bearing, though the MAX variant offers superior suspension performance. Enduro's engineering excellence manifests across multiple material options: High-Carbon Chromium Steel, 440C Stainless Steel, Ceramic-Hybrid, and XD15 with Ceramic or Stainless Balls. The distinctive deep groove race design accommodates maximum ball size for optimal load distribution. Each bearing incorporates sophisticated dual-lip seals positioned in precision micro grooves, creating a complete labyrinth defense system that delivers exceptional protection against environmental contaminants.