WHITE FB37 - Rear tire rims (6-loop) to inner alignment issues

[OaklandTech]

I purchased new rims and tires for my FB37 (13.6-28), the rims are (6-loop), and the isuue I am having is alignment of the inner rim to the loops. I have new 5/8-11 bolts (Grade 8) but I am approx 1/4' off from being able to insert the bolts.

I am thinking of putting the inner rim (0.375" thick) into the oven at heat to 300 degree F, by using a thermal expansion calculator this would gain me approx 1/4" needed.

I am seeking feedback from anyone having similar alignment issues, and possible solutions.

 

[OaklandTech]

09Nov2025 UPDATE - Project completed
Original issue: Rims corroded due to cloride ballast, unable to find replacement rims.

Solution: Purchased new 6-loop rims and rubber.

I found that the FB37 inner rims did not match the new 6-loop bolt diameter by 0.25 inches (0.125 each side)

Fabricated 12 - 0.375 thick plate steel coupons which were welded onto the inner rim adjusted to new bolt diameter.