Bike Axle Standards

At first 135mm was the most common rear axle spacing with 150mm used for dh.

Bike axle standards.

For decades quick release skewers were the standard for attaching wheels to a road bike. As always there are some exceptions but we will focus on modern axle standards that are supported by pub wheels. Yeah i know i m supposed to hate it because it s new and wtf bike industry but years ago i was one of small group who got to participate in a blind taste test of current axle standards and potential offerings and in the end i unknowingly chose boost which had no name at the time. If it is a thru axle it would have a ta in the description such as 110ta.

Skewers are for the bbq. Know your thru axle from your super boost spacing. 15x100mm 15x110mm boost and 20x110mm the first number refers to the axle diameter while the second refers to the dropout width of the bike. Mountain bike axle standards explained.

Quick release thru axle. Digging through my bins of collected bike parts i pulled a not small selection of rear through axles in what was the correct length and spacing for a 12 x 142mm rear hub. Hub axle standards don t worry brands like boyd enve alto and others are still improving the performance of the humble rim brake hub. Front mtb thru axles currently use three standards.

The bike industry is known for not creating or adhering to standards but it wasn t until i needed a rear axle i realized how bad it had gotten. How to measure a bicycle thru axle most thru axles are described by four measurements and you might see them described something like this. But this does build in constraints at both extremes of the. Our resident mechanic al explains axle standards.

But 142mm and 157mm soon superseded these standards with the extra 7mm allowing a stiffer interface with the frame. There s also a 20mm boost version out there which is also 20 x 110mm but has different brake spacing it s pretty limited at the moment so we. Best mountain bike wheels. In this example 15mm is the diameter 100mm is the o l d 127mm is the overall length and 1 5mm is the thread pitch.