Updated rim features: 1. WTB's Unbendium Bulge, a band of material on the sidewall that counters torsional, radial and lateral flex, 2. I-Beam vertical wall support counters spoke loads and further reduces flex, 3. Safety Seal is like a second bead inside the rim that the tire bead locks into preventing tire roll off under side loading, all have eyelets (disc only). XC (Cross Country), Trail (All Mountain), FR (Freeride), and DH (Downhill) models are optimized for best strength to weight ratio for their given application.
I-beam- A vertical beam designed to counter spoke loads and provide torsional rigidity
Unbendium Bulge- A band of material added to the sidewall of the rim to counter torsional, radial and lateral flex
WTBs LaserDisc Trail features: Usage: All Mountain Racing 28/32H Size: 26" Width: 21>27mm ERD 535 Eyelets k