Tandem pushchair twin pram recommended minimum age new born pushchair weight 186 kg harness system 5 point safety harness slider not adjustable wheel settings swivelling lockable wheel type solid rubber tyres number of wheels 4 safety bar with bumper bar footrest not adjustable dimensions 123 x 57 x 100 cm dimensions folded 61 x 57 x 95 cm included in delivery canopy footmuff shopping bag cup holder rain cover bumper bar