Bike Forums - View Single Post - What's up with so many different axle sizes?

10-07-05, 08:11 PM

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MasterSezFaster

UareFASTjustNOTfastENOUGH

Join Date: Jul 2005

Location: Amongst the hills in So.Cal.

Posts: 391

Bikes: Scott Gambler, Scott Ransom, Bianchi C2C 928

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A standard drop out (most mountain bikes) are 10mm and will accept a 10mm weather it be a qr or through axle. I have not seen any 11mm on a mountain bike so you should not need one. Some mountain bikes will have dropouts for 12mm, 15mm and even 20mm on the rear (very few though and the hubs are gonna run you 300$+ for a 20mm rear ).

You know what a qr (quick release) is, your typical wheel/hub with the lever that locks the wheel to the dropout which has an opening to slide the axle in. A through axle is designed for dropouts that are closed, meaning have no way to put an axle in other then (hence the name) through and they are bolt-ons.

MSF

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