Old 09-20-18, 04:52 AM
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What Size Front Thru Axle - 12mm vs 15mm - to future proof bike?

I am building an "all road" bike that will run 700c x say 40mm tires. The frame requires a 12mm x 142mm rear. The question is what thru axle is best for the fork - most can come 15mm x 100mm or 12mm x 100mm.

Should I go with 12mm since that is what the rear takes. My road bike also takes a 12mm x 100mm so I would but using the same axle size just for standardization.

Or is the 15mm becoming the new standard for front thru axles?
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