I'm using an 8.8 in the polo bike and it's yet to break. 12.9 would be better though for the amount of tension you put on there.
The grade and size are usually on the head of the bolt Like so -
12.9 grade bolts are black.
@O'Shane started
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I'm using an 8.8 in the polo bike and it's yet to break. 12.9 would be better though for the amount of tension you put on there.
The grade and size are usually on the head of the bolt
Like so -
12.9 grade bolts are black.