H Plus Son SL42 Road RimThe SL42 Road Rim from H Plus Son is a work of perfection in terms of performance output, durability and braking excellence. Like the Formation Face rim that H Plus Son also make, the SL42 owes its stiffness and aerodynamics to the fine-tuned 42mm profile height. G609 Aluminium Alloy ConstructionThe two models share the same lightness without any reduction in strength or stiffness thanks to the G609 aluminium alloy that was selected for its construction. The G609 alloy is 30% stronger than the 6061-aluminium alloy used in standard rim manufacture, meaning this rim is stronger and lighter than most others on the market of the same weight. The SL42 also features a precisely machined side wall for use with rim brakes.Features:Material: G609 AlloyHeight: 42mmJoint: WeldedERD: 557mmBraking Surface: Rim brakes, Machined Weight: 615gBuy H Plus Son Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.