E*thirteen Reduced Range Cassette 2

For many types of riding, especially in the "steep and deep", E*thirteen has found that the full 9-52 range is often not needed. In such scenarios, tighter gear spacing can actually be more beneficial than outright range, which is why they've developed this 13-52 version of the Helix cassette. With many e-bikes limited in top speed, we can see this make a lot of sense in that application.