If you do spread your frame to 130, you can add spacers to the left side of your rear axle, underneath the locknut, evening out the amount of axle overhanging the locknuts on each side, and reduce even further the dish of your rear wheel. This will make it laterally stronger and more likely to withstand side loads when riding outdoors. There is something nice, too, about the wheel fitting into the frame as if it is supposed to, rather than watching your dropouts deflect in angle as you’re closing your skewer. You’re giving up something that is nice about having a steel bike over a mass market carbon bike. If the advantage you enjoy is just the ability to be sloppy with mechanical details and not be concerned with the equipment since it’s nearly worthless, I understand that. In that case, remain unconcerned and carry on. It’s just that you asked why make it right if there’s no risk in causing imminent failure, so I thought I’d point out some reasons.
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