Please examine the images carefully and understand that this is amateur handmade work. Those seeking perfection should refrain from purchasing. Please refer to the images for installation instructions. The width has been made tighter. I believe there will be no tire interference when using big tires, so there should be no impact on the stroke. *This is not a guarantee. Width: Approximately 6.6cm If interference occurs, please shave off the interfering part. Since it is made of wood, it can be shaved with a cutter, etc. Size: Length, front to back: Approximately 9.7cm Width: Approximately 6.6cm Only the item in the last image will be shipped. The others are reference images. No price reduction.