DURA-ACE WH-R9370 C99 - Front / N/A

Aero Built for Distance

Designed for time trials and triathlon racing, the DURA-ACE C99 combines a deep 99 mm carbon rim, super-aero carbon spokes, and a low-drag spoke configuration to reduce aerodynamic resistance and support efficient pacing at high speeds.

Features

• 99 mm Carbon Rim Profile: Deep-section full-carbon rim is optimized to minimize aerodynamic drag during time trials and triathlon racing
• Super-Aero Carbon Spokes: Wide, low-profile carbon spokes reduce aerodynamic resistance while maintaining the stiffness required for efficient power transfer
• Super-Aero Carbon Spokes: Wide, low-profile carbon spokes reduce aerodynamic resistance and maintain efficient power transfer
• 16-Spoke Aero Configuration: Purpose-built for sustained high-speed efforts where aerodynamic performance plays a critical role in overall efficiency
• Precision Cup-and-Cone Hubs: Refined cup-and-cone bearings deliver smooth rolling efficiency, long-term durability, and tunable performance
• Includes tubeless valves, packaged separately and ready for installation

A Straight Line to Victory

The 99 mm carbon rim and aero-focused spoke design are engineered to reduce aerodynamic drag at high cruising speeds. This efficient design helps riders maintain momentum and maximize speed throughout time trial and triathlon efforts.

Built for Race-Day Pacing

Designed with professional triathletes, the C99 helps riders sustain speed efficiently over long distances. The result is smoother pacing and a more predictable ride when executing a race plan.

Free Economy shipping on orders $75+ within the continental US.
Free pick up at Dragonspine Cycling, Chicago.

Standard items

• Economy: $12.99, free on $75+ · 5–8 business days
• Expedited: $15.14, $2.15 on $75+ · 2–5 business days
• UPS 2nd Day Air: $34.99 · up to 3 lb
• FedEx Standard Overnight: $64 · up to 3 lb

Oversized items
Wheels and wheelsets, forks, frames and framesets, racks, repair stands, trainers, trailers and bike travel cases.

• Economy: $35, free on $750+ · 5–8 business days
• Expedited: $45, $10 on $750+ · 2–5 business days

By quote
Standard items over 3 lb by 2nd Day or overnight, oversized items by 2nd Day or overnight, and international shipping. Contact us or call +1 (872) 946-7006.

When orders ship
Items in stock at our Chicago location ordered by 3 PM CT on a business day ship the same day. Items from our warehouse ship within 4–5 business days. Warehouse items are ready for pickup in 4–5 business days.

Free-shipping thresholds are based on the order total after discounts. Full details in our Shipping policy.

Have a question? Contact us now.