—— Professional-Grade Cycling Hubs ——
Cutting-edge engineering for ultimate cycling performance. A masterpiece of precision manufacturing and material science, delivering unmatched straight-pull performance on the road.
01 / Front Hub Engineering
The SR277 front hub combines premium-grade materials with meticulous craftsmanship to deliver exceptional straight-pull performance and reliability.
The pairing of AL6061 and AL7075 perfectly balances durability and low weight to handle all road terrain with confidence.
02 / Rear Hub Performance
Engineered with advanced ratchet technology for instant power engagement and superior on-road performance.
The SR277 rear hub features outstanding bracing angle, boosting wheel stiffness and power transfer for more efficient riding.
Precision-machined alloys built for peak performance and maximum durability
Used for the hub body, AL6061 delivers the ideal balance of strength, low weight and vibration damping, essential for high-performance road cycling.
Reserved for high-stress components including cassette body and axle, AL7075 offers superior strength-to-weight ratio and fatigue resistance under heavy loads.
For wheel builders — all spoke lacing data consolidated in one place.
| Specification | Front | Rear |
|---|---|---|
| Material | AL 6061 (Body) + AL 7075 (Axle) | AL 6061 (Body) + AL 7075 (Cassette Body & Axle) |
| Spoke System | Straight-Pull (T-Head Carbon Spoke) | |
| Spoke Holes | 16H / 20H / 24H (1:1) for option | 20H / 24H (1:1) / 24H (2:1) for option |
| Spoke Gauge | 14G | |
| Bearings | 2 × 6802 | 1 x 15267 / 3 × 6802 |
| Brake Interface | Center Lock | |
| Spacing & End Caps | 100mm (Φ12 Thru-Axle) | 142mm (Φ12mm Thru-Axle) |
| P.C.D. | Φ37.0mm – Φ37.0mm | Non-Drive Side: Φ36.4mm Drive Side: Φ44.9mm |
| Drivetrain System | — | PG Ratchet |
| Finish | Adonized Black | |
| Weight | 272g-279g / set +/- 5g | |
Designed for maximum road performance. Every component, from aerospace alloys to precision bearings, is optimized to elevate your riding experience.
