e*thirteen Grappler RS – 27.5 × 2.4, Flux GR Radial Casing (Momentum)

The Grappler RS Radial takes the proven rear‑specific RS tread and pairs it with e*thirteen’s advanced Flux GR Radial casing. Taller center knobs and steeper ramp angles deliver strong braking bite, fast rolling, and reliable rear‑wheel hookup under acceleration. Proportionally taller shoulder knobs keep the lean transition smooth and predictable on loose or technical terrain.

The Flux GR Radial casing introduces radial‑ply construction, allowing the tread and sidewall to flex independently. This gives the rear wheel better tracking under braking, improved conformity to rough terrain, and reduced rider fatigue over long stages. A 72 TPI dual‑ply layout with Dual Apex inserts keeps the tire stable under hard cornering loads without compromising the radial compliance.

This version uses the Momentum dual compound, which balances speed, durability, and grip. A firmer 50a center compound improves rolling efficiency and tread life, while the 42a MoPo‑grade shoulders maintain high cornering traction. It’s the ideal choice for riders who want a fast‑rolling rear tire without giving up confidence in the turns.

Pair it with a Grappler Radial front tire for the most connected, comfortable setup on long, rough Enduro or E‑MTB stages.

Key Features

• Rear‑specific tread with taller center knobs and steeper ramp angles


• Radial‑ply construction for improved braking stability and bump absorption


• Flux GR Radial casing: 72 TPI dual‑ply with Dual Apex inserts


• Momentum compound: 50a center / 42a shoulder dual compound


• 27.5" × 2.4"


• Tubeless ready

Specifications

• Size: 27.5" × 2.4"


• Casing: Flux GR Radial – 2‑ply 72 TPI with Dual Apex inserts & Armor Weave sidewall


• Compound: Momentum (50a center / 42a shoulder)


• Compatibility: Tubeless ready


• Weight: 1460 g ±

A fast‑rolling, durable rear tire with excellent cornering grip and superior terrain compliance — perfect for Enduro, DH, and E‑MTB riders who want speed without sacrificing control.