I was out riding my street strider 3i & the frame cracked right underneath the fold joint on the welded seal. The company sent me a new frame with the bottom bracket bearings & square tapers attached to the frame. I'm very nervous about taking apart my old street strider & putting together the new one. Taking all of the brake & gear shift wires out of the old frame & putting them into the new frame correctly looks like it's going to be very tough to accomplish. Adjusting the wheels (the back wheel came loose once on the old bike - I don't understand why there is a locking nut on the right side of the rear wheel but no locking nut on the left side ), keeping the tire pressure at the correct PSI, steering, brakes & everything else was so difficult when I first put my old street strider together. I have never been able to get the gear shifter to shift to gear 3 no matter what I adjust or do to the gear shift assembly. I hope it is easier when I'm putting the gear shift assembly on the new frame. It was mostly assembled before, what if all of the parts do not fit correctly & tightly on the new bike after I put it together? I'm worried about my safety & hope that I don't have any problems while taking apart the old bike & assembling the new one. I can't afford to go to a bike mechanic & am not mechanically inclined. Do you have any advice on where to put the parts after taking them off the old frame & before putting them on the new frame? My family & I are very concerned that I may do something wrong when trying to put this street strider together. I’m worried about what parts of the bike to add lubricants to on the bike. I hope that I’m not bothering you & that you can give some advice to help me take apart my old street strider & put together the new one. Any help that you could give me with my street strider would be appreciated because I’ve been worrying about getting this finished so that I can get back outside & focus on my workouts again & not on my safety. I hope this bike will last me for several years & that I don't have any more problems. Thanks for your time.