JetBlack S1 Sport Magnetic Trainer with Lite App Virtual Parent Size (Mass +/-1g): 17g including

Size (Mass +/-1g): 17g including all titanium hardware

Chainline: 52mm chainline - 168mm Q-factor - compatible with 142mm and 148mm (Boost) frames

Contains natural Aloe Vera

Chamois material: There aren't many fancy marketing terms being thrown around with these shorts but they use foam padding in the chamois that should keep your butt comfy for rides up to 2-3 hour duration

JetBlack S1 Sport Magnetic Trainer with Lite App Virtual Parent Size (Mass +/-1g): 17g includingThe JetBlack S1 Sport Trainer is a magnetic resistance bicycle trainer that is perfectly tuned for fitness riding The S1 is an economy package that has a fixed resistance mode When used with the full range of JetBlack sensors You'll be able to fine tune your entire training experience You can even upload your session to Training Peaks and Strava All JetBlack trainers come with a lifetime warranty. Out of the box, it only works with QR end caps.