wltoys 144001/124019/124018 MOD 1 Spur Gear. This is a 30 tooth drop in replacement for the original spur gear making it super easy to convert to mod one gearing. They are 3-D printed from the same carbon fiber nylon that’s my other gears and have been proven up to 112 miles an hour. This is the same size as stock spur gear and can paired with an 18 tooth pinion to achieve stock gearing. Auction is for spur gear only center shaft and bearings not included. Condition is “New”. Shipped with USPS First Class.