This lightweight powerstroll is easily fitted and will turn most manual wheelchairs into a carer controlled wheelchair. Maximum Gradient : 6 degree Fits most wheelchairs with seat widths from 14" to 20" (including narrow track wheelchairs). Maximum range 10 miles and top speed is 3mph. Total Weight is 14kg Uses exisiting wheelchair handgrips. Trigger handset with variable speed dial and directon button. Removeable fabric battery pack. Lightweight at 14kg and less than 8 kg with battery pack removed. Twin 'Drive' wheels with 8" black non-marking PU tyres Maximum user weight capacity 18 stone /115kg. Maximum gradient six degrees.