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Wheelchair (Royal)specifications : suspension:active -tracdrive wheels:10in,(260mm) pneumaticanti-tip wheels:5in., (127mm) solid(front -mounted)rear caster wheels:6in,. (150mm) Solid( rear-mounted)maximum speed: up to 4.0mph (6.4km/h)range:up to 15miles (25km)brakes:intelligent brakeing" electronic regenerative -,disc park brakeground clearance:2.3 in ( 60mm)turning radius: 25in (635mm)MAximum safe slope:8°overall size :length :44in (1120mm) (with foot platform) platform fold: 33.4in (850mm)width :25.2in (640mm)high: 44.5in 1130mm seat fold : 28.3in 720mmseat options:medium-back color :gray(seat width: 19in (480 mm)seat back hith : 20in (510mm) with coupillow including: 650mmseat depth: 19.2in (490mm)drivetrain:two motor ,mid-wheel drivebatteries:two 12-volt , U-1 batteries (33AH)battery charger:5-amp ,off-boardelectronics:50-amp PG-VR2weight capacity300lbs (136KG)component weights:Total weights: 207lbs (94kg)base:105lbs (48kg)standard seat: 49lbs (22kg ) including armrest,safety belt assybatteries:26.4lbs, (12kg) each varies with user weight, terrain type, battery amp hour rating (AH),battery condition, and tire condition motors,controller type,tire type, and tire condition.this specificification can be subject to a variance of (+or-)10% due to manufacturing to tolerances and contined product improvement, this spectification can be subject to variance of (+or _ 3%AGM or Gel-Cell type recommended.