BS for 15's convo pros and tires?

[GBGN1]

Whats the best BS for a 15x8.5 Convo pro rims?
Looking at 15x7 on the front?


Whats everyone running for street tires for these?

 

[Franks86gn]

3.375" B.S here. I run a 28x9 et drag. No rubbing. I have 15x4 in the front with 165Rs.

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[GBGN1]

I want to run 15x7's on the front. Bs on those?

 

[HUMBLE-U2]

15 x 8 centerline telstar - 4"BS 275 x 60 15 m/t dragradials airbaged no rubbing.

 

[GBGN1]

So something around 3.5 bs in the back would be good-how about front....same?