What is top speed? Are doors available for back? Do you make a winter cover?

Thanks for your message, we appreciate you reaching out. The approximate top speed for the 750 Cres is 45 to 55 mph depending on conditions. If you need further information, please contact our Customer Care Team M-F 8:30 to 5:30 CDT at (844) 464-4786 or email at info@axis-offroad.com. They will be available to assist you with any questions you may have or contact us anytime via our website at https://www.axis-offroad.com