ICAN 38mm 700C Wheelset for Shimano with 700 x 23c Michelin Tires & Kenda Tubes 20/24 holes BEST ALL AROUND CARBON RIM, AERODYNAMIC AND LIGHTWEIGHT-38mm rim is our lightest, and most crosswind stable wheel. The 38mm profile provides some aerodynamic advantage while also being superlight for climbing and acceleration. That would be best choice for riders looking for an all around wheelset FULL CARBON CLINCHER. HIGH STRENGTH CARBON FOR LIGHTWEIGHT PERFORMANCE-using the latest carbon forming technology, we are able to build a very strong rim from carbon only. A critical area for durability, the tire bead hook of clincher rim is up 73% stronger than other carbon clincher rims. This make wheel that is very light with positive braking performance and reliable durability 23MM WIDE RIM, INCREASED AERODYNAMICS AND IMPROVED HANDLING-the rim's 23mm width improves aerodynamics by creating a more uniform airflow over the wheel, balancing the aerodynamic forces of the rim with the leading edge of the tire AERO BLADED SPOKES-increase wheel strength and improve aerodynamic speed SMOOTH ROLLING, AND DURABLE HUBS-with 4 sealed cartridge bearings in the rear hub and 2 in the front, are great all around durable road bike hubs