Mountain Bike Quick Release Standards

Thru axles work better to keep wheels attached to the bike.

Mountain bike quick release standards.

Many bikes sold still use frames with open dropouts. Some wheels and forks have swappable end caps or dropout inserts allowing for the use of either. A guide to mountain bike axle standards. This works on frames with open dropouts only.

So the width hasn t changed from quick release wheels on the front. Traditionally frames and forks had slotted dropouts. Again the axle is part of the hub. Quick release thru axle.

Mountain bike axle standards explained. If it is a thru axle it would have a ta in the description such as 110ta. Mountain bikes mostly use a 15x100mm front thru axle and you might still find a few road bikes that adopted that standard early on but 12 100 is more future proof for road. Both quick release skewers and thru axles are metal rods that keep bicycle wheels in place.

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. As always there are some exceptions but we will focus on modern axle standards that are supported by pub wheels. The first crop of disc bikes used quick release with 100mm axle length at the front and either 130mm or 135mm at the rear. Thru axles thread through the wheel hub and circular dropout holes.

Which quick release is right for you. Skewers use a camming mechanism to secure the wheel to u shaped fork dropouts. The width from one face of the hub to the other a k a. In bicycle nomenclature qr refers to a skewer and ta refers to a thru axle.

For most standard road and mtb bikes the wheel hubs will accommodate standard 5mm skewers. Quick release skewers were a huge innovation for cycling offering fast reliable wheel swaps. When choosing a quick release the most important things to note are skewer diameter skewer length materials and cam type. These were used for many years on mountain bikes using 100mm front and 135mm rear axle spacing i e.

Then along came thru axles borrowed from mountain bikes where they. However the latest generation of bolt through mtb forks and frames utilizes larger diameter axles for additional.