S&M 18" ATF Frame Props It's built with chromoly construction

It's built with chromoly construction throughout the frame

It's built from Hi-ten steel throughout the frame

which allows the hub to transfer power in one direction

The Box Disc Brake Adapter is designed to help improve braking control on frames where disc brakes were not standard

S&M 18" ATF Frame Props It's built with chromoly constructionS&M's ATF Frame is available in a lot of different variations, this is the 18" version of the ATF that downsizes that classic style making it more accessible than ever. The ATF (Alcohol, tobacco and firearms) uses S&M's standard heat treated supertherm tube set with a tapered and butted top tube for extra strength, dent resistant down tube, tapered rear stays with massive rear tire clearance and heat treated micro dropouts. ###section### Product Specs