Bola ULT 40R 700C Carbon Disc Wheelset, 40mm Tubeless, 1210g, T800 Carbon, Road and Gravel

The Bola ULT 40R 700C Carbon Disc Wheelset is an all‑round mid‑profile carbon wheelset engineered for road racers, gran fondo participants, endurance cyclists and gravel enthusiasts who want one versatile wheelset to conquer paved tarmac, rolling hills and light gravel terrain. Blending competitive low weight, real‑world aerodynamic performance, tubeless‑ready flexibility and broad drivetrain compatibility, it delivers premium‑grade performance without the premium price tag of big‑brand 40‑mm carbon wheel alternatives.

Crafted from high‑grade Toray T800 unidirectional matte carbon fiber, this complete disc carbon wheelset delivers a verified pair weight of only 1210g (±30g, excluding rim tape & valve). Reduced rotational mass brings snappy acceleration, responsive climbing and less rider fatigue over multi‑hour endurance events, while the 40 mm rim depth unlocks meaningful aero gains on flat and rolling roads. Unlike deeper 50mm+ aero rims that suffer from harsh cross‑wind instability, this 40 mm mid‑depth profile keeps handling predictable and confidence‑inspiring in gusty wind conditions — a huge advantage for everyday training and long‑distance gran fondo rides.

Choose between 28 mm or 30 mm external rim width variants, paired with 21 mm /24 mm internal rim beds. This flexible rim geometry supports a wide tire range from 25‑42 mm. Run narrow 25‑42c road tires for crit racing and fast pavement rides; fit larger‑volume 40‑48c tyres for light gravel adventures. The tubeless‑ready rim design lets you drop tyre pressures safely to boost comfort, dampen road vibration and improve corner grip, while lowering pinch‑flat risk; it also works perfectly with standard clincher tyres.

At its core sits the precision‑built BL100 hub fitted with TPI ceramic bearings and a 54‑tooth ratchet engagement system. The premium ceramic bearings cut rolling friction for ultra‑smooth free‑spinning and extended service life compared to standard steel bearing hubs. The 54T ratchet delivers fast 6.7‑degree engagement, nearly eliminating pedal lag; power transfers instantly out of corners, during hard sprint efforts and steep out‑of‑saddle climbs. The wheels are laced with trusted Sapim CX‑Ray aero stainless steel spokes, using optimized 2x/1x lacing patterns to balance lateral stiffness for power transfer and vertical compliance to smooth out road buzz.

Fully tested against ISO 4210‑7 safety standards. Rigorous lab validation includes 750 000‑cycle fatigue testing and >40J impact resistance. Strict in‑house QC inspects rim trueness, roundness, spoke tension and dynamic balance, delivering consistent build quality for race day and year‑round training. Maximum system weight hits 105 kg to fit most rider + bike + gear combinations. UCI‑compliant construction makes it eligible for many sanctioned amateur race events.

Quick Buyer Insight vs other Bola wheel lines: Positioned as a versatile mid‑profile workhorse. The ULT 40R brings 40 mm aero depth, premium Sapim CX‑Ray spokes and multi‑drivetrain compatibility (Shimano / SRAM / Campagnolo). It is optimized for road‑dominant mixed‑terrain riding; not built for heavy‑load expedition bikepacking or aggressive downhill trails.