ENVE SES 4. 5 Pro 700c Wheel SES 4. 5 PRO wheels were designed for cyclists seeking the ultimate wheelset, where low weight, aerodynamics, and rolling efficiency meet. PRO-series product has been developed in direct collaboration with the world's top racers and represents the pinnacle of innovation-engineered and built for race-winning performance. The core of the 4. 5 PRO wheel is the PRO Hubset, which brings ENVE's proven INNERDRIVE technology to an ultralight straight-pull hub shell. The INNERDRIVE PRO hub goes head to head with the lightest hubs out there without sacrificing the stiffness required by the world's best. Features New rim laminate using higher modulus, lower areal weight carbon fiber rim is optimized to further improve tubeless tire and rim reliability with a hookless bead design that allows for the precise rim dimensions required to achieve the best tubeless performance Ultralight PRO Innerdrive Hubset with PRO Ceramic Bearings, low-friction bearing cages, stainless steel races and low-contact seals reduce drag and increase rolling efficiency Premium Straight Pull hubs utilize equal spoke lengths with an anti-twist spoke design for improved wheel strength and performance Molded Spoke Hole Technology offers a variety of benefits that ultimately result in a more durable and reliable carbon fiber rim and wheel55mm rear depth and 23. 5mm internal rim width is optimized for 28mm tires. For use with Tubeless tires only49mm front depth and 25mm internal rim width is optimized for 23. 5mm tires. For use with Tubeless tires only | Enve | Ses 4. 5 Pro 700C Wheel Front, 12X100Mm, Centerlock