The Stackhouse Doubleman Overspeed Trainer is the safest training device. By attaching this device to 2 runners you can over speed the runner in back with comfort and security. The back runner allows the front runner to stretch the elastic up to 3 times its length, and then allows the back runner to be pulled forward with the help of the elastic. … Read more
Our Premium Service Extended Warranty covers you with full in-home service for up to 5 years beyond the manufacturer's warranty! This warranty is only valid in the Lower 48 states, Hawaii, & Alaska.
First Year only $49.95!
The Stackhouse Doubleman Overspeed Trainer is the safest training device. By attaching this device to 2 runners you can over speed the runner in back with comfort and security. The back runner allows the front runner to stretch the elastic up to 3 times its length, and then allows the back runner to be pulled forward with the help of the elastic.
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