[High-quality material] Our bicycle spikes are made of high-quality aluminum alloy, which is light in weight, high in strength, wear-resistant, and the shaft thread is of good quality. After tightening, there will be no looseness or breakage. Please rest assured to use. [Product size] Bicycle spike size: 100mm X 25mm. Install 9mm threaded holes. 220-pound load aluminum alloy bicycle spikes are suitable for general-purpose bicycles, road bicycles, mountain bikes, track bikes, mountain bikes, BMX, etc. (Reminder: please confirm whether the product size meets your needs before buying). [Anti-slip design] The diamond-shaped twill and wave groove anti-slip design can increase friction and ensure safety. Don't worry about accidentally falling. [Easy to install] The small bicycle pedals can be easily installed on the front or rear axle of the bicycle, making your legs more comfortable and relaxing. Note: Make sure the shaft length exceeds 0.5 cm If it is too short, it is not installed properly, or it is not strong enough. Product Specipication Happy weekend, easy life Come to a bicycle stunt show with your friends, this bicycle foot spike will definitely become your best tool. Enjoy the happiness that this bicycle foot nail brings to you. you will like it. The carved cylindrical shape with non-slip wave-shaped grooves can effectively fix the feet in the correct position. Very sure. Product Specipication: Protect the feet of adults or children from being caught by bicycle wheels It is made of high-quality aluminum alloy material, high hardness, strong and durable. The length of the pedal is sufficient to accommodate both feet. Product name: BMX Pile Material: high quality aluminum alloy Dimensions: 2.3 cm x 10 cm Diameter of threaded hole: 9mm. Carrying capacity: 100kg (200lb) Applicable models: BMX/bicycle/mountain bike