Super long axles + aluminum extension spacers + serrated wheel nuts, 2 of each. For multiple sets, please comment. The 12mm hex hub allows for installation with wheels and nuts with a thickness of 6mm to 12mm (11mm or more is required for serrated nuts). (Thickness 6mm = +16mm wider than 5mm. The wide width can be expanded to 28mm in proportion to the hub thickness) Since the Tamiya standard hub is 5mm thick, a 1mm or thicker spacer is required when installing it as is. When installing large dish wheels + a minimum 6mm hub, the threads will protrude as shown in photo 6. (Yokomo and Schumacher wheels have thicker material, so the protrusion will be less) Can be used on most 1050 or 1150 bearing upright chassis, but is for dogbone shafts and cannot be used with universal shafts. Can be used on various chassis such as TA01, TA02T, TA04, TA05, TL01, TT02B MS, TT02T, M01, M02, M03, M04, M05, M06, MF01X, FF02, DT02 (Desert Gator only), DF03, WR02, GF01, G6-01, WT01, WT01N, CR01, Manta Ray, Dirt Thrasher, Hotshot, Super Hotshot, etc., but cannot be used with shafts that are larger than the ones in the photos. Please refer to the photos and confirm and judge for yourself whether it can be installed. The idle shafts of M01-06, FF02, and WT01N can also be replaced with this. Super-wide conversion allows for stable landings even if you fail a jump on rough roads, and makes it less likely to roll over. You can also use it as a spare when the super long axle with 10mm hex hub, which is no longer available, wears out. It is a Tamiya standard expansion method, and no wheel modification like tube nut type wide hubs is required, so it is recommended for those who do not want to enlarge the axle hole of the wheel. Although it is a new, unused chassis and wheels have not been installed, there may be some scratches due to manufacturing, transportation, and storage, so please understand. The wheels, dogbone shafts, and calipers in the photos are not included. To keep the price low, it will be simply packaged with recycled paper and shipped by non-standard mail. No need to comment, you can buy it immediately. If you don't need it after purchase, I will not contact you except for the shipping notification. I am busy and it may be late, but I will ship within 7 days, so please wait patiently.