Some manufacturers recommend that you do not drive more than 50 miles on a space saver spare because the amount of tread is less than on a conventional tyre, but you should refer to the owner's manual for specific instructions that apply to your vehicle. Space savers are designed as a temporary spare, the idea being that you fit it if required and drive to the nearest tyre fitter to have your original replaced. Driving further than 50 miles may increase the risk of another puncture or even a blowout, which could result in an accident and would leave you stranded. Changing the space saver for a new tyre on your original wheel will reduce wear on the spare so it can be used again.