15x100 mm front thru-axle (15 mm x 100 mm, front)
What a 15x100 mm front thru-axle measures, which bikes use it, and why thread pitch matters as much as the width.
Published dimensions
| Axle diameter | 15 mm axle |
|---|---|
| Hub width | 100 mm hub width |
| Position | front |
| Thread pitch | commonly M15 x 1.5 |
SHELL commonly M15 x 1.5
SPINDLE see table
SPINDLE see table
Used on: the original 15 mm mountain-bike front standard, before Boost widened it.
15x100 was the first stiff mountain-bike front standard: a 15 mm axle in a 100 mm hub. Boost later widened the front to 110 mm, so a 15x100 hub will not fit a 15x110 Boost fork without a conversion kit. Confirm the hub width, not just the 15 mm diameter.
Frames and related axle standards
12x100 mm front thru-axle12 mm x 100 mm, front15x110 mm Boost front thru-axle15 mm x 110 mm Boost, front12x142 mm rear thru-axle12 mm x 142 mm, rear12x148 mm Boost rear thru-axle12 mm x 148 mm Boost, rear12x157 mm Super Boost rear thru-axle12 mm x 157 mm Super Boost, rearBSA bottom bracket shellthe frame's other threaded interface
SOURCES: BikeRadar, Mountain bike axle standards: the complete guide · Modern Bike, How To Measure Bicycle Thru-Axles