Aw, you're gonna do away with the wheels? Really?
I kinda like the wheels.
I think maybe the spike through her angles needs to be a pointed bolt with a nut and a rather large washer at the end, otherwise her right leg might slip loose and create unnecessary friction or drag.
Perhaps, she needs a third wheel near her lower chest or abdomen, so she can really get going down hills? (This could better explain the 'strap'?) Maybe not.
It appears she might have too many polys, that might be a shame.
Don't want to type it in?