Bests & Worsts Reviews from Amazon

RaceFace makes three different boot covers for the following cranks types. I did the resarch to make this east for your. Take a few minutes to read this information. NOTE: When ordering these boot covers you will receive the Carbon Crank Boots (size medium). Read on for details. 1. NEXT SL G4 CRANK BOOTS These are built specifically for the Next SL G4 cranks. Also, these crank boot covers have the word “NEXT” printed on them, whereas the other boots only have RaceFace on them. 2. CARBON CRANK BOOTS (this is the version you will receive if ordering here). This is the MEDIUM SIZE boot cover. The carbon crank boot covers are compatible with: - Next SL Cinch (G3) - Sixc Cinch - Chester - Respond - Next/Next SL (24mm Spindle) - Sixc (24mm Spindle) - Also, most other popular carbon MTB cranks and assorted alloy DH cranks The carbon crank boots are sold under the following part numbers based on color selection. The part number will be printed on a sticker affixed to the package you receive so you can verify what you received. A10066GRY = grey A10066BLU = blue A10066RED = red A10066TURQ = turquoise A10066YEL = yellow A10066GRN = green A10066PIN = pink A10066ORA = orang A10066BLK = black 3. ALLOY CRANK BOOT This is the SMALL SIZE boot cover. The alloy crank boot covers are compatible with: - Turbine Cinch - Atlas Cinch - Atlas (24mm Spindle) - Turbine (24mm Spindle) - Aeffect Cinch (175mm length ONLY) - Also, most other popular alloy MTB cranks (except some alloy DH cranksets) The alloy crank boots are sold under the following part numbers based on color selection. The part number will be printed on a sticker affixed to the package you receive so you can verify what you received. - A10068BLK = black - A10068GRY = grey - A10068BLU = blue - A10068RED = red - A10068TURQ = turquoise - A10068362 = website did not specify color - A10068388 = website did not specify color - A10068021 = website did not specify color Reference I pulled this information directly from the RaceFace website My Impression This is a semi-hard plastic that will do the job it is intended for. Although, these crank boots did not fit my cranks from this order, I did purchase a pair from another vendor that sold the correct size (small) for my cranks. However, they are all made from the same material, so I am giving five stars for quality of product. I installed the Alloy Crank Boots (size small) on my Stumpjumper which has Aeffect cranks. They fit good. The only thing I noticed is that the hole were you put your Allen key is a little off, but the boot cover is playable enough that I was able to install it with no problem.