Sun Rims Envy 406 36H Front Rim Black

Product Overview The Sun Rims Envy is a 36-hole 20" front rim engineered for BMX racing. The double-walled alloy construction provides lightweight performance with adequate stiffness for front-wheel loads. The brakeless front profile is optimized for disc-brake setups on modern BMX frames. At 395g, it delivers balance between weight and durability across competitive racing.

Key Features

• Double-Walled Alloy Construction – Two-layer rim structure increases stiffness without proportional weight gain; resists denting and impact damage common in racing
• Brakeless Front Profile – Designed specifically for disc-brake systems; eliminates brake track weight and complexity; enables clean, minimal aesthetic
• 36-Hole Configuration – Standard spoke count for BMX racing; maximizes spoke count for load distribution and spoke redundancy across high-impact applications
• Wide 28.5mm Profile – Generous rim width accommodates 1.75" and wider BMX tires; provides stable tire seating and improved lateral support during cornering
• Lightweight Design – 395g weight minimizes unsprung mass for responsive handling and faster acceleration
• Disc-Brake Compatible – Optimized for integration with hydraulic or mechanical disc-brake systems on 20" racing frames
• Competitive Racing Focus – Engineered for gate-start performance and consistent front-end handling

Technical Specifications

• Wheel Size: 20" (406mm ETRTO)
• Width: 28.5mm
• Spoke Holes: 36 (drilled)
• Material: Alloy
• Rim Profile: Double-walled, brakeless (front)
• ERD (Effective Rim Diameter): 390mm
• Weight: 395g
• Brake Surface: None (not intended for brake use)
• Valve Type: Not specified

Compatibility and Ideal Use Cases

• Fits: 20" BMX race wheels with 36-hole hubs; front wheel position on disc-brake systems only
• Brake System Requirement: Disc brakes only—cannot be used with rim brakes or V-brakes due to lack of brake track
• Tire Compatibility: 20"x1.75" and wider BMX tires; verify rim width matches tire specification
• Best For: 20" BMX racers with modern disc-brake frames; riders prioritizing lightweight front-end performance
• Ideal Riders: Competitive BMX racers; riders building disc-equipped complete wheels; those seeking reliable front rim performance
• Wheel Building: Requires 36-hole front hub, spokes, and nipples to complete wheel assembly
• Not Recommended For: Rim-brake or V-brake systems; riders requiring brake surface compatibility

Maintenance Note Double-walled construction requires standard spoke tension checks and wheel truing procedures. Verify spoke tension regularly to maintain wheel trueness and prevent spoke breakage under racing loads.