Bore diametergear

All SKB Competition Series 12 gauge over/under shotguns were produced with oversized bores. These barrels had a nominal bore diameter of 0.735".

When the rain won’t go away, and your bicycle is more often used as a boat rather than a land craft, you may want to consider stainless steel bearings. While a little softer than chromium bearing steel, 440C stainless steel is a good alternative in constant wet conditions, or where sweat becomes a problem such as headset bearings. These bearings have stainless 440C races, balls & cages. This material provides maximum corrosion resistance in applications and environments where critical such as on your winter bike or for MTB.

Bore diameterof cylinder

When the rain won’t go away, and your bicycle is more often used as a boat rather than a land craft, you may want to consider stainless steel bearings. While a little softer than chromium bearing steel, 440C stainless steel is a good alternative in constant wet conditions, or where sweat becomes a problem such as headset bearings. These bearings have stainless 440C races, balls & cages. This material provides maximum corrosion resistance in applications and environments where critical such as on your winter bike or for MTB.

Bore diameterof bearing

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Instead of starting with a .729" bore and removing metal from the inside to create the larger diameter, SKB actually manufactured a .735" bore to begin with.

Back boring is a technique of slightly enlarging the interior dimension of the bore of a shotgun beyond the normal dimensions.