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Tires Tires Tires


87broncoboy

Member
Joined
Jul 2, 2010
Messages
12
Vehicle Year
1987
Transmission
Manual
Whats the largest tire i can run on an all stock 87 BII? it has a 2.9 and dana 28s i think.
 
Your bronco probably has 3.55:1 or 4.10.1 gear ratio in the axles. stay at the 30" tire size :example---»»» 30/10,5/r15( 235/75 /15) maybe 31 not sure
 
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31"s will rub on it, stay with a 30" or 235/75 tires if its completly stock.
 
hey your reason RSH I'm wrong .I read the tread
 
Last edited:
Whats the largest tire i can run on an all stock 87 BII? it has a 2.9 and dana 28s i think.
I have the same B2. But, with 373 gears. I also have a 2" suspension lift. have been wanting to go with the 31s. But i am told and have been reading the forum that that isnt the best setup to run 31s. should at least have 456s to maintain the proper performance of the little b2.
currently i have 235s on it and i will probably keep them on that way for awhile.
 
Welll you need 4.10's with 31's and 4.56's with 33's. But I'm running 31's on both my 84 (2.8L) and 99 (3.0L) with a little drop in performance but not really noticable with the 3.73's.

But I would say stick with 235/75R15's any bigger then that and you'll be rubbing more then likely
 
Ok thanks everybody. Im new to the world of smaller 4x4s.
 
Check your springs out too. Most B2s have issues with spring sag just from age. You may get rub even with 30s if your leaf springs are wearing out.
 
Check your springs out too. Most B2s have issues with spring sag just from age. You may get rub even with 30s if your leaf springs are wearing out.

mine were rubbing on all 4s on driveways, small bumps, a passenger and making sharp turns on the 235 before i did the ear springs and the leveling springs. now it dosnt even come close. i think i gained the full 2 inches above stock all around.
 
any size you want, all a matter of how bad you want them to fit....
 

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