rear axle width ..help

[225digger]

need alittle help with rear axle width ,   im going to build my new car with a 21" shoulder hoop ,   the rear wheels im going to run are 12" wide with a 6" back spacing . the tires im thinking of using are goodyear  d5  31x13.0-15  tred width is 12.8  im if figuring correctly ,  outside of hoop will be 24"  2 inches of tire clearance from hoop to sidewall , 6" back spacing , 3/8" for rotor thickness  ... im at a 39" wide axle , from outside of axle to outside of axle ..... does this measuremet of 39" sound correct   ?

[rooman]

With 6" back space wheels you are obviously going to have a wider housing than most who run 3.75" bs. The 2" tire to hoop dimension is a little large--I usually run about 1/2"--3/4" clearance in that area. Taking those numbers into consideration your housing width is about right (if you run the bigger clearance number).

Roo

[225digger]

roo , thanks , i didnt think i could get that close for some reason , but , ill have to shorten it up alittle ..... the wheels i already have so figured id just get alittle longer wheel , i dont think it hurts anything to have the bs centered up in the wheel any ?   who knows i have another project i might use them on so i might go to a shorter bs wheel .  thanks again !