![]() Gearing up refers to decreasing the gear ratio, and gearing down increases it. A differential is a collection of gears designed to allow two tires on the same axle to spin at different rates - check out this amazing video from the 1930s for more information on how differentials work I've never seen a better informational video.Ī gear ratio is a measure of how many times one gear spins compared to another one (something we'll get into later). The most common gears you can change on an R/C vehicle are the pinion gear, which is the gear directly connected to the motor's output shaft, and the spur gear, which is the main drive gear in a vehicle, and usually interfaces with the pinion gear (a pinion can also be a gear associated with a differential assembly, so make sure to use context to deduce which is being referred to). One gear doesn't really do you any good by itself, and if two gears have the exact same circumference, they don't help out much, either, so for our purposes, gearing will refer to a collection of gears of varying sizes working together toward a common goal. I'm not sure why you would want to run the risk of NIMH batteries either as very few of them are cable of delivering enough amps to satisfy the demands of the Velinion system.Everyone knows what a gear is, but "gearing" refers to the way that the individual gears work together to gain a mechanical advantage. Will get you around 70kmh on 3s and 45kmh on 2s and heat will never be an issue. When running 26/83 in the stampy the motor could fry an egg after 5mins.įor a rustler I'd recommend 90/23. I can get 45mins out of a 4000mah 3s Lipo and the motor is warm at most even in the middle of summer using 21/90. Hence, my suggestion is to gear it for bashing not speed runs. What they fail to tell you is that you will kill the esc and motor if you use this gearing for a 45min bashing session. The Traxxas gearing chart is a marketing tool to sell the product.Īs such they tell you all about the 100kmh plus speed when using certain pinion / Spur combinations. Top speed is about 70kmh on 3s Lipos and just under 50kmh on 2s. I have a stampede with a MMP / Team Epic Duo2 (Sensored)3570kv motor and run 90/21 gearing. I am almost settled on a 28/83 combo which according to the Traxxas gearing chart is the absolute limit for NiMH batterys and the rustler, im open to change I just wanted to make sure before next month so if anyone has a suggestion :thumb: Stock gearing on the Xl5 is 23T pinion and 90T Spur = 10.63FGR The plan is for the youngest to run 8.4V 7 cell NiMH and the eldest to run a 3s 20C lipo so gearing is going to be key Stock gearing for the Vxl system is as followsħcell 4000+ NiMH battery - 28T pinion with 83T spur = 8.05 Final gear ratioģS 4000 mAh Lipo - 31T pinion with 76T spur = 6.66 FGR ![]() The xl5 is brushless ready from new so it already came with the most of the upgraded parts with the exception of ball bearings front and rear (Ordered) Apart from that its gearing im looking at. I purchased a genuine VXL velineon system (Right time, Right price) which arrived last week and will stay in the box untill Xmas but im left wondering if there is anything i've forgotten. I bought an xl5 for my boys at the start of the year and its time to upgrade it to brushless :thumb: everytime we get out for a bash they seem to spend more time driving either my vorza or our/my hyper. ![]()
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