JL uses square tubing and serious gussets that are all triangles. There wasn't a spot on the JL that wasn't gone over. It has more gussets then my roll design.
I've talked to John and he said he's tested all designs. This one worked the best.
I do think JL did go way over board on this. But it's a pretty good guarntee that it will last.
Fireball has gussets in key spots. I think it'll flex more. Which isn't a bad thing. You need some flex.
But for 99.9% of riders the JL MX arm is a bit over kill.
His regular arm and the Fireball arm will be fine.
Which At that point, you can go by which one you like better in the looks department
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