{"product_id":"injora-15g-stainless-steel-16-6-1-transmission-gear-pinion-set-for-trx4m-1-18-rc-crawler","title":"INJORA 15g Stainless Steel 16.6:1 Transmission Gear Pinion Set for TRX4M 1\/18 RC Crawler","description":"\u003cp\u003eThis INJORA transmission gear pinion set replaces the stock gears in 1\/18 scale TRX4M RC crawlers like the Defender, Bronco, K10 High Trail, and F150. Machined from stainless steel, the set includes a 16.6:1 reduction gear set and an 11-tooth motor pinion. The 16.6:1 ratio matches the stock gearing, so it won't change your truck's wheel speed—it's built to offer greater strength and corrosion resistance than the original parts.\u003c\/p\u003e\u003ch2\u003eGear Set Contents and Compatibility\u003c\/h2\u003e\u003cp\u003eThe kit contains all internal transmission gears plus the motor pinion. It's designed for direct fit into the TRX4M platform without modification. The stainless steel construction resists rust and wear, which helps the drivetrain last longer in dusty or wet conditions. Compatibility covers these models: TRX4M Defender, Bronco, K10 High Trail, F150.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGear Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e16.6:1 (same as stock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor Pinion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11 teeth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15 g (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMachining\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCNC machined\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTRX4M Defender, Bronco, K10 High Trail, F150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eHow to Install This Gear Set\u003c\/h2\u003e\u003cp\u003eInstallation is straightforward if you're comfortable opening the transmission. Start by applying grease to the gears. Remove the existing gears from your 1\/18 RC crawler. Then install the new 16.6:1 transmission gears and the 11-tooth motor pinion. The process mirrors a standard TRX4M gear swap—no special tools needed beyond common hex drivers.\u003c\/p\u003e\u003ch2\u003eHow Does This Set Compare to Stock TRX4M Gears?\u003c\/h2\u003e\u003cp\u003eThe most noticeable difference is material: stainless steel versus the stock steel or brass parts. Stainless is more rust-resistant, which can be a plus if you run in wet or muddy terrain. The 16.6:1 ratio is identical to the factory gearing, so speed and torque remain unchanged—you're swapping for durability, not performance gain. The set includes both the transmission reduction gears and the motor pinion, so you don't need to buy extra pieces.\u003c\/p\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003ch3\u003eWill this fit my TRX4M K10 High Trail?\u003c\/h3\u003e\u003cp\u003eYes, it's designed for the TRX4M platform and fits all current models including the K10 High Trail, Defender, Bronco, and F150.\u003c\/p\u003e\u003ch3\u003eDoes the 16.6:1 ratio change crawling performance?\u003c\/h3\u003e\u003cp\u003eNo. The ratio matches the stock gears exactly, so wheel speed and torque remain the same. The upgrade is purely for increased strength and corrosion resistance.\u003c\/p\u003e\u003ch3\u003eWhat grease should I use?\u003c\/h3\u003e\u003cp\u003eThe product information doesn't specify a particular grease. For best results, use a standard RC gear grease that's compatible with metal gears.\u003c\/p\u003e\u003ch3\u003eIs the motor pinion also stainless steel?\u003c\/h3\u003e\u003cp\u003eYes, the entire set is machined from stainless steel, including the 11-tooth motor pinion.\u003c\/p\u003e","brand":"INJORA","offers":[{"title":"Default Title","offer_id":58074768605487,"sku":null,"price":25.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/4478\/7503\/files\/injora-15g-stainless-steel-1661-transmission-gear-pinion-set-for-trx4m-118-rc-crawler-1.jpg?v=1781473750","url":"https:\/\/toysforkid.co.uk\/products\/injora-15g-stainless-steel-16-6-1-transmission-gear-pinion-set-for-trx4m-1-18-rc-crawler","provider":"Toys For Kid","version":"1.0","type":"link"}