Feedback Sports Omnium Trainer Zero-Drive Sled – No Resistance Red. Youre already a proud owner of the Omnium Over-Drive Bike Trainer but today youre looking for a resistance-free simple and effective spin session. Designed to be lightweight and portable the Omnium Zero Resistance Sled is adaptable to whatever bike you ride and whatever workout youre targeting let the Zero-Drive Sled be your next training accessory.