ethirteen Sylvan Race Alloy e*spec All Mountain Wheels - Superboost 157 Rear

ethirteen Sylvan Race Alloy e*spec All Mountain Wheels - Superboost 157 Rear Info

Sylvan Race Alloy e*spec All Mountain Wheels – Superboost 157 Rear are engineered for modern trail and all-mountain e-bikes that demand a balance of low weight, controlled ride feel, and long-term durability. Built around ethirteen’s first-ever asymmetric alloy rim design, these wheels are tuned to handle daily trail mileage while remaining confident when the terrain turns fast, steep, and technical.

The 30mm internal-width asymmetric rim uses a low-profile rim height to increase compliance, helping the wheel absorb impacts, reduce rider fatigue, and improve traction over rough surfaces. By offsetting the rim profile, spoke tension is more evenly balanced between the drive and non-drive sides, resulting in a stronger, more consistent wheel that maintains its feel under load. A dedicated valve dock interface further improves tubeless reliability by creating a secure sealing surface for valves.

At the heart of the system is ethirteen’s e*spec rear hub, purpose-built for the added torque and weight of e-bike use. An oversized hub shell, large 6808 bearings, steel axle, and 32-spoke build provide durability and improved bearing life, while enhanced sealing keeps performance consistent in demanding conditions. The 4-pawl freehub with 3° engagement delivers fast, positive pickup—ideal for quick accelerations and technical climbing.

Sylvan Race Alloy e*spec All Mountain Wheels – Superboost 157 Rear Specs at a Glance

• Intended Use: All-mountain and trail e-bike riding.
• Rim Design: Asymmetric alloy rim.
• Internal Rim Width: 30mm.
• Rim Profile: Low-profile for increased compliance and impact absorption.
• Hub: e*spec rear hub with oversized shell and steel axle.
• Bearings: Large 6808 bearings for durability and longevity.
• Spoke Count: 32 spokes.
• Freehub Engagement: 4-pawl system with 3° engagement.
• Spacing: Superboost 157 rear.
• Setup: Tubeless-ready with valve dock interface.

Design Benefits

1. Balanced Ride Feel: Asymmetric rim design equalizes spoke tension for strength and consistency.
2. E-Bike Durability: Reinforced hub internals handle higher torque and system weight.
3. Improved Compliance: Low rim height helps smooth trail chatter and maintain traction.

Final Take

The Sylvan Race Alloy e*spec All Mountain Wheels – Superboost 157 Rear are a smart choice for riders looking to optimize their e-bike’s performance without sacrificing durability. With a compliant asymmetric rim, fast-engaging freehub, and e-bike-specific hub design, this rear wheel delivers a controlled, lively ride that’s ready for demanding trail use.

Note: Wheels are sold individually. Add both front and rear wheels to complete a wheelset.