{"product_id":"kyosho-is118-10t-hard-drive-bevel-gear-st-rr-evo","title":"Kyosho IS118 10T Hard Drive Bevel Gear ST-RR Evo","description":"\u003cp\u003eA 10 tooth hard specification drive bevel gear for Kyosho's Inferno ST-RR Evo truggy differentials.\u003c\/p\u003e\u003cp\u003eThis is the small pinion bevel that drives the large ring gear inside the diff, and together the pair transfer power from the centre driveline out to that axle. Being the smaller of the two, it turns faster and its teeth engage more often per revolution of the axle, which means it generally wears before the ring gear does.\u003c\/p\u003e\u003cp\u003eThe hard specification is a heat treated grade, and on a truggy it earns its place. These cars are heavier than buggies and carry more rotating mass in their wheels, so the shock loading through the diff gears when a tire regains traction after a jump is substantially higher.\u003c\/p\u003e\u003cp\u003eWear is progressive rather than sudden. The tooth faces polish, then pit, then round off, and the diff gets noisier under load until teeth strip. Because the pair wear into each other, replacing this against a worn ring gear just destroys the new part.\u003c\/p\u003e\u003cp\u003eIt mates with the 43 tooth ring gear for a 4.3:1 ratio. Mesh is set with shims and matters as much as the gears themselves.\u003c\/p\u003e","brand":"PowerHobby","offers":[{"title":"Default Title","offer_id":44532862517336,"sku":"KYOIS118","price":14.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0567\/0554\/8376\/files\/kyois118_579e583e-f2fa-4f45-9f6a-905fdf1d77e8.jpg?v=1786242961","url":"https:\/\/beavertonmilestonehobby.com\/products\/kyosho-is118-10t-hard-drive-bevel-gear-st-rr-evo","provider":"Beaverton Milestone Hobby","version":"1.0","type":"link"}