Lifespan TR4000i Treadmill Review
TREADMILL DOCTOR NOTE :
This is not the best effort that Lifespan has ever put on the market. You are either better off in the upper or lower end of Lifespan's lineup.
We are not saying the TR4000i is a bad model, but if you stay focused on improved power generating capability, higher quality parts and a stronger warranty, all that is yours in the Lifespan TR5000i which is just $300 extra. If you are pinching pennies the TR3000i is the smaller, lower powered version that will save you $200. This one is like the missing child in the Lifespan lineup. Great features but you can get their full AC unit for only $300 more. Well worth paying the extra for the full AC unit.