Promax SL-1 Stem Lock. Cold forged and fully CNC-machined from 7075 aluminum alloy, SL-1 stem locks offer peace of mind and a level of added protection against losing your front wheel and fork legs in the event of a broken steerer tube. Available in red, blue, gold and black, in 1” and 1 1/8” sizes. SL-1 provides added security and reliability with its lightweight yet extremely durable construction. Ready to install and available in four stylish colors, you can rest assured knowing your bike is secure.
