OldCruiser

Can going from a Standard framed bike to a crank forward bike cause knee pain ?

Carbonfiberboy 

Most any change can cause pain. I don't think a simple thing like that should be a big issue - look at recumbent riders for example. More likely it's either poor fit or poor technique.

OldCruiser

Thanks for the reply .
After researching , I was so worried after about having my saddles too low , I think I’ve got them too high . Especially on the crank forward bikes . I should be able to put both feet down when I stop , I can’t where I have them right now . I’ve bought some quick release seat clamps that will allow me to adjust while out riding .
I’ll be lowering them and give it a try .

Carbonfiberboy 

I haven't ridden a crank forward bike, but I suspect that the heel-on-pedal method should work for setting saddle height. With your butt planted on the saddle where it normally is, put one heel on a pedal so that your lower leg bones point right at the pedal axle. With that knee totally locked out, your heel should just barely touch the pedal when it's furthest away from you. You can check this out on the road, pedaling normally, then putting one heel on a pedal and continuing to pedal. If you lose contact with the pedal, saddle is too high. If there's pressure on the pedal there, it's too low. One has to be sort of coasting and soft-pedaling to do this, as it's a bit weird to completely lock the knee at the bottom of the stroke.

OldCruiser

Installed my new seat clamps on three of my bikes this morning and lowered my saddles a little . On my Rockhopper I had to cut the seatpost about 3/4” to get it lowered , it was already bottomed out in the seat tube .
Then I took each one out for a spin .
After seven miles between them , which is my average ride distance , my knees feel better than they did two days ago when I rode my Roll 6.5 miles . Hopefully I’ve solved my issue and once the knees get better I can get back to increasing my distance.