frame help

[aarons0913]

building a softail chopper and not real good with the math part so asking advise on my two choices of frames for my build.

1st frame with 34° rake,
4” stretch downtubes, 24.5” backbone. using 5 degree raked triple trees.

or 2nd frame with 38° rake,
4” stretch downtubes, 24-1/2” backbone. using 3 degree raked triple trees

total rake can not be more then 42 degree to pass iowa dot so can title it.

apprecaite any pics of similar or advise or suggestions on theabove two builds which is the better. plan on using 18" rear and 21" front. 41mm front end.

thanks

i really love the look and feel of the american ironhorse texas chopper but i want to build my own as close to that look and feel with it being a copy.

[Am4wag]

1st. frame /tree combo has 39deg. total,2nd. has 41deg. total--not a whole lotta difference.Does Iowa measure total rake or only neck rake?

[hanger]

Originally Posted by Am4wag

1st. frame /tree combo has 39deg. total,2nd. has 41deg. total--not a whole lotta difference.Does Iowa measure total rake or only neck rake?

Just looking at the numbers I'm guessing the first will possibly reduce the trail to a negative value. I'd draw it out to dimension-or have someone do it for you-and do the trig to figure the trail before buying anything.

[pan63]

Originally Posted by hanger

Just looking at the numbers I'm guessing the first will possibly give you too much trail. I'd draw it out to dimension-or have someone do it for you-and do the trig to figure the trail before buying anything.

Better handling bike with the 38 and 3 degree trees.

[hanger]

Sorry, I didn't have enough coffee this am before posting.......I screwed up my first post..........the first frame tree combo will possibly give you a negative trail.

[pushrod243]

The 38 dgree frame with 3 degrees will have the better trail numbers. Plus once it's inspected if you ever want to inrease the tree rake you can.

[aarons0913]

thanks to all for taking the time to post and help!!!! very much appreciated.with all the advise am going with the 38 and 3. will post future post with updates on the build in pics to come too. again thanks

[Am4wag]

Well,if it's any input for ya,I run a 36 w/5,and no stretch........tracks very nice.

[aarons0913]

error on part but iowa dot has atotal 45 degree rake not 42 so again sorry but thinking of changing from 3 to 5 degree raked trees stay with 38 degree raked frame. any idea's.

[aarons0913]

38 degree frame rake, with 5 degree raked triple trees, 2+ over stock 41mm tubes, using 90/90x21 front tire.do not know the offset of triple clamp. can anyone help with the trail calculations and if would ride smooth or if any changes what would they be.thanks