Mountain Bike Thru Axle Sizes

Rear thru axle from my evil following uses a 12 x 142mm m12 x 1 5mm thread pitch shimano e thru standard.

Mountain bike thru axle sizes.

142 x 12 thru axles are all the rage now. Thru axles are also inserted through a hollow hub axle but they re bigger rear ones are 12mm in. Cysky bike axle quick release skewer front rear bicycle axle wheel hub fit for road bike mountain bike mtb bmx 1 pair 3 9 out of 5 stars 325 11 99 11. Front mtb thru axles currently use three standards.

The standard mtb rear axle dimensions are 135x5mm for a qr rear hub but jump and gravity bikes may use wider and thick axles for extra strength and stiffness with the available sizes being 135 10 142 12 150 12 157 12 and 165 12. Plus there are additional lengths for split pivot bikes and trek boost abp. Most thru axles are described by four measurements and you might see them described something like this. Thru axles make the bike stiffer which reduces lateral flex and results in better tracking especially through corners and at speed.

The hub axle which was 9mm in diameter. 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. This is done via visual reference. Early cyclocross bikes borrowed the 15mm front thru axle diameter but as disc brakes became more common on drop bar bikes they all standardized to 12mm.

180mm length 20mm thread length. 15x100mm 15x110mm boost and 20x110mm the first number refers to the axle diameter while the second refers to the dropout width of the bike. Thru axle hub ta skewer hub qr step 2. They essentially operate the same as front thru axles on the rear of the bike.

Determine if your frame fork uses a thru axle ta or skewer qr. Old quick release hubs and 142 x 12mm thru axle hubs have the same widths between the hub flanges so there is no change in terms of hub flange positioning and wheel strength and stiffness. Thru axles are commonly 12mm 15mm and 20mm in diameter. Ensure your rear hub is the correct size to fit your frame.

You can see more details about these measurements below. Spacing on these is 142mm wide with an axle diameter of 12mm. A guide to mountain bike axle standards 1. 15 x 100mm 127 length 1 5.

Boost gives a 148 x 12mm spacing which allows for the hub flanges to be further apart which gives a potentially stronger and stiffer rear wheel. Boost being newer isn t as much as a clusterfuck. Skewers are almost always 5mm in diameter. Traditionally frames and forks had slotted dropouts.