Bola PRO 50G 700C Carbon Disc Wheelset – 50mm Depth, 34–38mm External, Ceramic Hub, Foil Carbon Spokes

The Bola PRO 50G 700C carbon disc wheelset is Bola’s premium mixed‑terrain performance wheelset, purpose‑built for gravel racers, cyclocross competitors, gran fondo endurance riders and light‑load bikepackers. Blending 50‑mm aerodynamic rim depth, wide modern rim geometry, lightweight foil carbon spokes and high‑end ceramic‑bearing hubs, it delivers race‑ready stiffness, speed and off‑road durability for riders who ride pavement, hardpack gravel and cyclocross courses with one single wheelset.

Constructed from high‑grade Toray T800 UD matte carbon fiber, this complete wheelset uses straight‑pull foil carbon spokes (20/20, 2‑cross lacing). The pair weighs 1250‑1290g (excluding rim tape & valves) depending on internal rim width option (28 / 30 / 32 mm internal). Foil carbon spokes bring multiple real‑world benefits: reduced rotating weight, excellent aerodynamic profile, high lateral rigidity for sprinting and cornering, plus effective vibration damping to soften trail chatter on rough gravel roads.

Choose internal rim widths of 28 mm / 30 mm / 32 mm, paired with 34‑38 mm external width. This broad‑bodied tubeless‑ready rim supports tires ranging 33‑52 mm. Run narrow 28‑32 mm road tyres for fast asphalt gran fondo; mount 40‑50 mm large‑volume gravel or cyclocross rubber for loose, rocky and muddy terrain. Thanks to the generous internal rim bed you can safely drop tubeless tyre pressures, boost corner traction, absorb trail vibration and drastically lower pinch‑flat risk. It also works flawlessly with conventional clincher tyres.

At its heart sits the precision‑machined BL240 aluminum hub with premium ceramic bearings and a 54‑tooth ratchet system. The 54T ratchet delivers fast 6.7‑degree engagement, nearly eliminating pedal lag; instant power transfer is critical for gravel surges, cyclocross technical sections, sprint exits and steep out‑of‑saddle climbs. Low‑friction ceramic bearings provide silky‑smooth free‑spinning performance, resist contamination from mud and grit, and extend service intervals compared to standard steel bearings. The hub uses Center‑Lock disc rotor mounting and accepts 12x100 front /12x142 rear thru‑axle dropouts.
Rigorously lab validated to ISO 4210‑7 cycling safety standards. Passes 750 000‑cycle fatigue testing and >40J impact resistance. Strict in‑house quality control inspects rim trueness, roundness, spoke tension and dynamic balance, delivering consistent build quality for race‑day competition and year‑round adventure riding. Maximum system weight reaches 120 kg, suitable for most rider + bike + gear combinations. UCI‑compliant construction allows usage in most sanctioned amateur gravel and cyclocross events.

Quick Buyer Insight vs other Bola series: The PRO 50G is Bola’s flagship mixed‑terrain wheelset, distinguished by foil carbon spokes and 50 mm deep wide‑profile rim. Compared to SL 35G / ELT 35G (35 mm depth steel‑spoke gravel wheels), it delivers stronger aerodynamic gains on fast rolling mixed‑surface courses. Compared to ULT 40R/45R road‑focused wheels, it has far wider rim beds optimized for gravel‑sized tyres. Best for mixed‑terrain riders; not intended for fully‑loaded heavy expedition bikepacking or downhill mountain biking.