Any two gears will have a “ratio”; if your car has a 20-tooth (20T) pinion and a 100-tooth (100T) spur gear, that’s a 20:100 ratio. This system works well for hard surfaces, but wheelspin on loose surfaces causes inaccurate speed readings. We need to go one step further, however, and divide the number of teeth on the spur gear (100) by the number of teeth on the pinion (20). And that the ratio across the second gear set is 40 over 10 or 4 to 1. To collect critical RPM data (Revolutions Per Minute), a "trigger magnet" is installed in the spur gear of electric models, or the flywheel of nitro vehicles. 48 PITCH Robinson Racing deserves credit for popularizing 48-pitch gears in off-road; until Rob Robinson developed the in-between pitch, racers had to choose between 32-pitch gears (durable, but limited in gearing options) or 64-pitch (plenty of gearing options, but the tiny teeth were easily stripped). The off-road standard, 48-pitch gears offer a good mix of ratio options and durability. Enter the tire diameter to get a table of rollouts. Try a lower gear ratio (smaller pinion gear for example). The Telemetry Expander 2.0 with the installed GPS Module 2.0 provides the most accurate speed data possible. Paying attention? Gear Calculator – Technical Help. Robinson Racing offers convenient pinion 6 packs for about $15. 1st Gear = 57.44 km/h - 35.61 mph 2nd Gear = 84.24 km/h - 52.23 mph 3rd Gear = 108.31 km/h - 67.16 mph 4th Gear = 189.55 km/h - 117.52 mph 5th Gear = 223 km/h - 138.26 mph 6th Gear = 236.94 km/h - 146.9 mph 7th Gear = 261.45 km/h - 162.1 mph 8th Gear = 280.82 km/h - … TRAXXAS.com Traxxas, 6250 Traxxas Way, McKinney, TX 75070, Phone: 972-549-3000, Fax: 972-549-3011, e-mail: support@Traxxas.com THE FOLLOWING GEAR RATIOS ARE ONLY RECOMMENDED FOR THE LISTED MODELS WITH THE STOCK POWER SYSTEM AND STANDARD TIRES SHEET 1 OF 1 Source Filename: Y:\Common Dev2\GPU031 Slot … Also, at speeds at or over 45mph, wind resistance, drivetrain drag, … Just like in a full size car, the numerically higher ratio is actually geared "lower" for more acceleration while just the opposite will permit more top speed. This is an optional Traxxas "Long" RPM Sensor, and is intended for use with the Traxxas XO-1 1/7 Scale vehicle. The idler (middle) gear has no effect on the total drive reduction; you can factor it into the equation, but it will cancel itself out. The GPS … Therefore, a higher turn motor will need a larger pinion / smaller spur gear combination to make use of all this low … Since on-road cars dont have to endure jumps and jolts, 64-pitch gears hold up well. Standard telemetry sensors use your vehicle’s gear ratio and tire size to calculate speed based on RPM. The Traxxas TQi radio system, Wireless Link Module, ... Standard telemetry sensors use your vehicle’s gear ratio and tire size to calculate speed based on RPM. This transmissions top gear has 20 teeth, and the diferential (bottom) gear has 48 teeth for a transmission ratio of 2.4:1. For more top speed, use a larger pinion gear. This calculator is designed to follow the recommendations of the ANSI standard B6.1-1968, R-1974. How to: The driving force behind your RC vehicle To calculate the car’s gear ratio, you need to be familiar with the type of drivetrain it has. Welcome to the 3rd and final installment of the T-Maxx performance guide. Enter the transmission ratio, spur, and pinion to generate a table of gear ratios. Graphical gear calculator for bicycle gearing systems. Due to inclement weather, order processing and shipping may be delayed. The only larger tooth profile in RC is 1 module, a metric size that works out to 25.4 pitch. 32 PITCH This chunky gear pitch isnt found on 1/10 electric vehicles much anymore, but gas cars, monster trucks and 4x4 short course trucks often use 32-pitch gears to cope with the heavy horsepower exerted on their transmissions. Nor-Cal Hobbies “Gears” app is an R/C car and truck gear ratio and rollout calculator. Calculators. Therefore all input dimensions must be in imperial units (lbf, ins and hp) as requested in the calculator. In this segment, we go over ways to get smoother action and better performance out of your drive train. For more top speed, use a larger pinion gear. Spur Gear / Pinion Gear = Gear Ratio 86 / 23 = 3.74:1 (This means the spur gear will rotate once for every 3.74 times the pinion gear, and therefore the motor shaft, does.) Your RC Car manual should give recommendations on gear ratios. This system works well for hard surfaces, but wheelspin on loose surfaces causes inaccurate speed readings. The model here is the Mark Jenkins OBA & TSM, LOW CG. Here's how to fix the high speed pinion gear to a Traxxas Slash 4x4. The Traxxas GPS Module 2.0 uses both … If you are not able to run your model for at least four minutes before the batteries die, then change to a lower gear ratio. When most people talk about their cars gear ratio, they are referring to the number of teeth on spur (large) gear and the pinion (small) gear. If you are worried that you might be under or overgeared, check the temperature of the battery pack and motor after a full run. The first gear set is 30 over 10 or 3 to 1. Includes derailleur gears and internal gear hubs. Designed for the R/C car or truck racing nut looking for a super easy way to determine gearing on your Android phone right at your pit table. More on metric gears later. The final-drive ratio in the Sport, however, is different than the other TRX-4 models in Low gear because Traxxas equips the Sport with a 17-tooth pinion and 39-tooth spur (2.29:1 ratio) in place of the other models’ 11T/45T combo (4.09:1 ratio). If you want more acceleration and less top speed, use a smaller pinion gear (fewer teeth). Now by using the gear ratio formula we looked at earlier, we can determine the ratio across the gears. Despite being able to select any gear ratio you like, you should still take into consideration the motor being used. Right: In a shaft-driven car, the transmission ratio is determined by dividing the number of teeth on the differentials ring gear by the number of teeth on the pinion attached to the driveshaft. For example: An overall ratio of 19.72 will give you incredible acceleration, but low top speed. You dont need to spend a lot of money to add gearing options to your pit box. Colors group similar values. Words: Erich Reichert Photos: Hope McCALL. A higher turn motor (13.5t, 17.5t etc) will have more torque but less top speed or RPM. 888-TRAXXAS | Phone and Live Chat Support Available 7 Days a week, 8:30am-9:00pm CST. Once we have all four numbers (Motor Kv, Battery Voltage, Pinion Gear Teeth, and Spur Gear Teeth, we can calculate the RPM to the transmission. If you want more acceleration and less top speed, use a smaller pinion gear (fewer teeth). Fixie Many factors have been taken into consideration to make this calculator as accurate as possible, but certain variables like vehicle weight, battery quality, drivetrain drag, etc can have an effect on the actual speed. Grafischer Ritzelrechner zur Berechnung der Entfaltung von Fahrradschaltungen. The Tranny Also has a Gear Ratio associated with it, take the Traxxas T-Maxx tranny for example: First Gear is: 6.69:1 Second Gear is: 4.56:1. The Telemetry Expander 2.0 with GPS Module provides the most accurate speed data possible. We'll also show you how to choose the correct gear ratio for the track and teach you how to get the best performance out of your 2-speed for improved lap times. If the batteries are extremely hot, and/or the motor is too hot to touch, your model is probably overgeared (higher ratio numerically). 2WD RC vehicles typically have a single one-speed transmission. 64 PITCHThis is the pitch of choice among on-road racers mainly because of the huge number of available ratios and extra-smooth mesh of the very fine teeth. traxxas revo gear ratio chart close-ratio gearing cb-14 cb-15 cb-16 cb-17 cb-18 sg-35 17.795 16.608 15.570 14.654 13.840 sg-36 18.303 17.083 16.015 15.073 14.236 sg-37 18.811 17.557 16.460 15.492 14.631 sg-38 19.320 18.032 16.905 15.910 15.026 sg-39 19.828 18.506 17.350 16.329 15.422 sg-40 20.337 18.981 17.795 16.748 15.817 stock-ratio gearing cb-14 cb-15 cb … A 7.07 ratio would really go fast, but acceleration may be sluggish. 3+ is green, 2-3, blue, and below 2, red. This calculator is used to find the approximate maximum speed of your brushless-powered R/C vehicle. This temperature test assumes that the model is close to factory stock weight and operates freely with no excessive friction, dragging, or binding. A 7.07 ratio would really go fast, but acceleration may be sluggish. 4WD vehicles also usually have a one-speed transmission, and are gear and propeller shaft driven or belt and pulley driven. To offset the weight of the magnet, additional material is molded or cast into the opposite side of the spur gear or … This information can be used to determine the ratio across the entire series of … 30,000 divided by a 5.1:1 ratio gets you 5,882 RPM’s into the Tranny. So you would look for a gear ratio with a higher number. How to work out good tooth counts to come up with a desired gear ratio for multi-stage gearing. For example: An overall ratio of 19.72 will give you incredible acceleration, but low top speed. You can get even-number tooth counts (16-26T, #1050) or odd-number gears (15-25T, #1055). The Sport also skips the T-Lock remote-locking differentials; instead, you’ll find “spools” in their place for full-time, locked-axle …
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