The Bontrager Aeolus RSL Carbon Saddle represents a significant upgrade from its predecessor, boasting a full carbon construction that dramatically reduces weight without sacrificing comfort. This in-depth review compares the new RSL model to its earlier iteration, focusing on the key differences in material, design, and performance. We'll delve into the impact of the full carbon base on weight, stiffness, and comfort, examining how Bontrager has managed to create a lightweight saddle that's suitable for both high-intensity racing and long-distance endurance rides. We'll also assess the subtle design changes, like the 2-degree tilt, and explore the overall riding experience.This review provides a detailed analysis of the Bontrager Aeolus RSL's performance, weighing its advantages against any potential drawbacks. We'll explore the comfort level offered by the saddle's shape and materials, the durability of the construction, and the impact of the reduced weight on overall ride efficiency. Ultimately, this review aims to determine whether the upgrade from the previous model is worthwhile for serious cyclists seeking a lightweight, comfortable, and high-performance saddle for various riding styles and distances.
Pros And Cons
- 20 grams lighter than the previous model
- Same shape and profile as the previous model
- Improved fabric wrap for a nicer finish
- All-carbon base reduces weight
- Dirt can get trapped in the fabric, especially in off-road riding
Read more: The 5 Best Bike Saddles for Triathlons
Bontrager Aeolus RSL vs. Previous Model
This review compares the new Bontrager Aeolus RSL carbon saddle with its predecessor. The key difference lies in the base material: the RSL boasts a full carbon construction, while the older model used a carbon rail with a plastic base. This change significantly impacts weight and potentially, comfort and stiffness.

While some full-carbon saddles can be uncomfortable due to rigidity, Bontrager has addressed this with design features like cutouts and a thinner profile. The older model, although lighter, may feel harsher over longer rides due to its less forgiving material.

Design and Features of the Bontrager Aeolus RSL
The Bontrager Aeolus RSL features a 151 x 145mm dimension, which is a standard size for many riders. A notable addition is the 2-degree tilt. This subtle change aids comfort and reduces pressure points during longer rides. Although the saddle is marketed as race-ready, it proves comfortable enough for endurance rides or gravel use.

The top cover fabric appears identical to the previous model, providing a familiar feel and sufficient comfort. However, the RSL’s full-carbon construction allows for a more refined wrapping of the fabric around the saddle’s edges, improving aesthetics.

Weight Comparison and Performance
One of the most significant improvements is the weight reduction. The RSL model is noticeably lighter than its predecessor, weighing in at 145 grams compared to the older model's 165 grams. This 20-gram difference is substantial for a component that directly impacts a cyclist's performance and efficiency.

The reviewer mentions the saddle performs similarly to the older model in terms of comfort and durability. The improved weight, however, is a significant advantage, enhancing overall ride feel, particularly during longer distances.

Conclusion and Verdict
The Bontrager Aeolus RSL carbon saddle offers a noticeable upgrade from its previous iteration. The full carbon construction reduces weight without compromising comfort or durability. While the shape and profile remain virtually identical, the more refined finish and improved weight distribution make it a worthwhile upgrade for serious cyclists.

The minor drawbacks, like dirt accumulation on off-road usage, don't significantly detract from the overall positive experience. The Bontrager Aeolus RSL is a highly recommended saddle for those seeking lightweight, durable comfort.