8 3/4 Diff strengths?

justinp61 said

489's and 742's break in the same places as 741's do. Been there, done that and seen it many times.

BTW, it was a good design for it's intended use.

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Agreed. Good design for its intended use, which was not launching off a transbrake, but it's ability to last for 100,000 miles. IMHO the larger diameter would help achieve that.