Susser alternative to dual role

I am pleased to report the first, as this sport is unit:
+ Plastic roller with rubber coated (was important to me, so it does not slip away)
+ But no weight, yet very stable! No risk of breakage!
+ Just 5cm wide tires (ranging completely to reasonable without coming wiggle forwards and slipping the lateral abdominal muscles without use)
+ Advantage over two wheels side by side: Lateral abdominal muscles can be moved.
+ No squealing noises or similar
+ 20 (incl. Shipping) are still just as acceptable.
+ Is the bridge between the Carver Pro (over 30) and the other cheaper suppliers.
+ Feeling when rolling: The themselves a 100Kg man could lift it without the instrument breaks.
o For transport it is not, because you'd have to settle the rubber again, what determines an hour and takes the device therefore is not better

- A star would I pull for the laborious "dranmachen" of a foam handle. You will receive this device in pieces, so you even need to configure anything. Cost me about half an hour. However Nachem the handle turn was (thankfully he walked heavily tuned!) Does the role and the super grip dissolves then at least not by themselves ... But since the product (if it is only once finished, total is fine and works well, I draw from only half a star and give rounded 5 Stars)