Bola 700c Carbon Tubeless Road Rim – 60mm Deep, 28mm Wide

If you chase maximum real‑world aerodynamic gains for time‑trial, triathlon and flat‑road criterium racing, this Bola 60 mm deep‑section U‑shape carbon rim deserves your attention.

Many 60 mm deep rims on the market use sharp V‑shaped profiles that become twitchy and unpredictable under cross‑wind gusts. This U‑shaped geometry is tuned for real‑world yaw‑angle wind conditions, smoothing airflow and cutting turbulent side‑force, giving you more predictable steering compared to traditional V‑profile deep rims. Still, at 60 mm depth this rim catches more wind than 40‑50 mm rims — it is built for speed‑focused riders who understand deep‑section handling characteristics.

Two bead‑profile options to match your tire library:
‑ Hooked (21 mm internal): Works with nearly all standard clincher and tubeless road tyres. Run higher pressures up to 100‑125 psi, great if you swap multiple tyre models frequently.
‑ Hookless (23 mm internal): Slightly lighter rim construction, larger air‑volume for better ride compliance. Must use ETRTO hookless‑certified tubeless tires, keep pressures within 72‑87 psi per ETRTO specification.

Outer width: 28 mm｜ERD:518 mm — critical number for your spoke‑length calculator.

Four lay‑up weight tiers, match your build priorities:
‑ 435 g Extreme‑Light: Race‑day only build, absolute minimum rotating mass for TT / triathlon
‑ 455 g Ultra‑Light: Race‑focused, balance of low weight and impact toughness
‑ 485 g Super‑Light: Gran fondo, fast weekend training
‑ 535 g Standard: Thickest carbon walls, durability‑first for regular road training

Custom‑drilling capability sets this rim apart for serious builders: custom valve‑hole, assembly‑hole, spoke‑hole diameters and nipple angles (7° front / 5‑7° rear) are available upon request. It fits standard 700c disc‑brake road hubs, supporting both 6‑bolt and Center‑Lock rotor setups.

Every rim passes ISO 4210‑7 lab fatigue and impact testing. In‑house QC verifies flatness, roundness, spoke‑hole concentricity and dynamic balance <3 g. Max system weight 120 kg for professionally‑assembled wheels.

Real‑world builder perspective
Off‑the‑shelf 60 mm factory wheels lock you into fixed hub‑spoke combinations. Buying this bare rim puts full control into your hands. Pair it with your favourite high‑end or value‑priced hubs, pick your preferred spokes, and tune weight and strength exactly for your race calendar. Many customers build dedicated TT/triathlon race wheels, or replace one cracked expensive deep‑section rim instead of purchasing a full wheelset.
Where this rim shines
✅ Time‑trial & Triathlon builds for flat / rolling‑course maximum aerodynamic speed
✅ Sprint‑heavy criterium road racing
✅ Fast flat‑road gran fondo events
✅ Custom DIY wheel‑build projects, single‑rim replacement
✅ Riders wanting custom drill‑hole specifications
Where it’s NOT ideal
❌ Hill‑climb‑focused setups (extra depth adds weight vs 30‑40 mm rims)
❌ Constant gusty / exposed coastal commuting (60 mm depth increases cross‑wind sensitivity)
❌ Gravel, cyclocross, mountain‑bike heavy‑impact use
❌ If you need pre‑built ready‑to‑ride wheels
Builder critical warning
Accurate spoke‑length calculation (use ERD 518 mm!), proper lacing and precise spoke‑tension calibration are mandatory. Poor wheel‑building will damage rim and void manufacturing warranty. If you lack wheel‑building experience, take it to a trusted local bike shop.