What Gearing Should You Run? RC Drag Gearing Testing with DR10

[@noprepdragrctucson9098]

Timestamps & time, speed & averages, for other GNSS/tuning data nerds like us: 18/87 pass 1 - 0:50 pass 2 - 1:03 pass 3 - 1:18 Fastest Time - 3.34 Fastest Speed - 38mph Average 3.41 @ 38mph 22/87 pass 1 - 2:42 pass 2 - 2:57 pass 3 - 3:12 Fastest Time - 3.25 Fastest Speed - 43mph Average 3.29 @ 42.6mph 22/69 pass 1 - 4:03 pass 2 - 5:00 pass 3 - 5:14 Fastest Time - 3.11 Fastest Speed - 48mph Average 3.11 @ 47mph 32/69 pass 1 - 6:23 pass 2 - 6:37 pass 3 - 6:53 Fastest Time - 3.10 Fastest Speed - 51mph Average 3.15 @50.3

[@RoadsideRC]

Thanks!

[@noprepdragrctucson9098]

@@RoadsideRC Thanks for the vid & info!

[@preacherpauldudley-do-righ1080]

I asked for a gear video and you produced it...thanks RRC

[@RoadsideRC]

Here to help!

[@3piecedark]

Thanks for the info my friend...to a Noob this is a priceless lesson , never really understood that gearing dance until I just saw it for myself... Now I have the confidence to test my new DR10 w/out the fear of destroying it doing something ignorant "Knowledge Is Power" 💯💥💣🤜🏾🤛🏾

[@RoadsideRC]

Glad to help! I will be interested to hear your thoughts after you test some different gearing setups!

[@reallythough4591]

Your stock motor on the rtr is a reedy 3300kv. It won't touch the slash 3500 velenion out of the box. The Losi is running a 6500kv, and small pinion. Hi rpm, but tops out quick, and a ops accelerating. Stock dr10 tires are way to soft and flexible, and you drag left, as right tire has less weight, and spins up faster. When left catches up, she jumps back right. Get a tower extender for rear shocks, and get them vertical. Yank the 3300 reedy, and throw in the 4400kv tp with a 6s mamba monster for the amps. I've got a 35 pinion to 76 spur, and top speed I've managed on 2s is 66.9, and still accelerating with front wheels completely off the ground. If you add weight to the front, add a bunch behind bumper forward of wheels, and drop the pinion to like a 25. This will allow for the torque to move to ue extra weight quickly, and you should be in the 55mph range at 132 feet, and sub 3.0. turn the gain down on steering, and be ready to hold slightly right on launch, then feather from there. Wasn't really built for drag racing, but isn't hard to catch up with the right equipment. Out of the box, it isn't comparable to the slash or Losi. I dragged my buddies slash last weekend, 2s(me) 3s him. He couldn't touch me.

[@reallythough4591]

Also, get a good 150c or better 2s lipo, the difference is amazing. 50c battery isn't comparable. I'm running 150c 4000mah, and can run up to 7s, as my tp is rated at 120k rpm. Castles are 60-80k rpm.

[@Metalgearlee1]

Thank you for the info. Just got my DR10 last week and already order a bigger pinion.

[@RoadsideRC]

Awesome! Do note that this is not a stock RTR. It does have a different motor and ESC in it. Seems some folks are confused with that.

[@reallythough4591]

I've got some help from my own build if you need it.

[@DocSprocket]

I appreciate the info. Picked up a stock DR10 roller, and starting out at ground zero. Checked out a local club Friday night and just trying to find a starting point.

[@RoadsideRC]

Great! Your local club should be a big help, as the surface you are on makes a large difference.

[@randomrcwitray5376]

Love what you are doing really gave me a great perspective on drag style racing I’m ready to cross over to the other side

[@RoadsideRC]

Great!

[@thizzobishi]

Finally somebody did it. Thank you for your studies and sharing your results.

[@RoadsideRC]

Glad it was helpful! More to come - I feel I have just scratched the surface here.

[@RoadsideRC]

@@thizzobishi I'm not too sure why he was so worked up about my video. I just removed his comments. I appreciate your support!

[@GeckoRC]

Ohh I forgott a important question : I want to start with electronics, that I have here at home: toro 120a esc and ruddog 10.5t moror. Do you think that could be a good starting point? I'll not start in official races, only for myself for the beginning

[@RoadsideRC]

That will certainly get you running . Really look around at what classes folks are running in your area. That will guide your long-term electronics choices.

[@rhelton72]

Good info. Just ordered my first drag car DR10.

[@RoadsideRC]

I will be interested to see what you think of it!

[@ShadeTree_RC]

when ppl ask what gearing should i run i always tell them the same thing get a set of pinion gears and a base line of where the car is then start testing ....no magic number we ALL have to test and tune

[@RoadsideRC]

100% Different cars, different setups. It will make a big difference!

[@MoBay876rc]

Agree

[@R.C.DADDYHAWAII]

Just got one of these cars awesome info

[@OutLaw_No_Prep]

I am new to no prep drag racing, I am going to run a 2.5t motor your thoughts

[@RoadsideRC]

I never personally ran some that low of turn, but do suggest you compare vs what others are running in your area.

[@crazyeddy66]

Hey buddy, I bought a 69T spur and a set of pinions with a 22T pinion. They don't marry up together. How did you get them to marry up? I even drilled holes in the motor mount so it can slide closer, but now it hits my trany case. What do I do?

[@RoadsideRC]

That is exactly what I did. Opened up holes in the motor mount. Keep trying gear ratios until you find what fits.

[@Starkster50]

What motor you running ? I really want to try 32/69 but I only have 87 and 68 spur, pinion 18 -28 so I need to more assortments. My goal is set it for 13.5. Thank you for your efforts to help it appreciated.

[@RoadsideRC]

This had a higher KV. Castle motor in it at the time.

[@Starkster50]

I found a guy with a 13.5 that ran 39/69 2S stock 3300kv. He said he ran 53.5mph in the 2.90's, I'm assuming way up just cracking in the 2.90's, but it was interesting that you said you wanted to but it wouldn't fit? I received my 2nd package of pinions 32,34,36,39 and 72 spur, my 69 spur is still 2-3 days out. When you race with your new motor what class would that fall under ?

[@RoadsideRC]

You will have to check with your local area and the latest NPRC rules. They just changed the rule set for 2022, and I have not had a chance to fully digest them yet. Note: a lot of folks claiming to run 13.5T motors are running modified internals to get more speed.

[@earl8445]

@jimmy curious did you get and try out the new pinion and spur gear? Do you mind sharing your results and thoughts? Thanks in advance

[@Starkster50]

@@earl8445 Yes I did, it cogged bad for 3.5 feet or so, might work for a speed run but not for 132'.

[@RCengineJoe]

I'm an RC guy but know little about drag cars but it would seem to be advantageous if these cars came with a 2 speed transmission like many Nitro cars have?. Not sure of the distance you are traveling and measuring so maybe there is not enough time for a 2 speed to kick over to second gear. The advantage is power off the line and then transition to higher gear for speed. I'm a tinkerer too so I think I would try and find a 2 speed transmission and try and fit it in. Enough of my bazoo, nice video and very informative!

[@RoadsideRC]

That would be fun to see! Good luck with it.

[@GeckoRC]

Hi, got my DR10 just today. I can't wait to start in Drag Racing and make it more popular in Germany! One question: Do you run on 2S or 3S in the video?

[@RoadsideRC]

I run 2S. The regulations in my area require 2S.

[@GeckoRC]

@@RoadsideRC Thats what I want to read, I will run 2S too, thank you! I think the DR10 is geared for 3S out of the box, so your video is very helpful :)

[@speedracer12695]

Does the transmission gearing Play into this at all and if so is there different gear ratios that we can get to swap out in the transmission? Thank you for the answers

[@RoadsideRC]

Honestly, not really. You basically have one total gear ratio from motor to tires. Change it where it is easiest.

[@speedracer12695]

Thank you

[@saybolt13]

Hey. Just watched this vid. You were running a 2S 100C correct? Did you get the 22/69 to fit without modifications?? I bought a 22/69 based on your vid but these won’t even come close to engaging. Thanks!

[@RoadsideRC]

Yes - running 2S. No - they don't fit stock. I took a dremel to the motor mount screw holes to give me more room.

[@allaspectsrc4178]

Good video..even better information that guys can really use .nice job

[@RoadsideRC]

Thanks 👍

[@RotaryChannel]

Great Video! I'm trying out a 75 spur with 87 with the factory setup (ESC and Motor) Have you ever had a problem with having consistent passes with power with different gearing? I cant get 3 passes in with it randomly cutting power. My thinking is that its the ESC limitations but not quite sure..

[@RoadsideRC]

First - you need to upgrade your battery. What you are referring to is mostly due to the sustained power drain on that battery, and it not being able to keep up with the demand. After you are sure you have a proper battery, then start looking at an ESC upgrade.

[@patricksimon6385]

Great video my friend!

[@RoadsideRC]

Thank you very much!

[@Starkster50]

This video and Gravity Racer GT have really inspired me, credit goes out to both of them ! I need to get more 2s batteries to make a good outing. Stock DR10 with 26/78 with Hot Racing locker. I'm having more trouble with operating the Skyrc Analyzer. What do you think about installing a Losi 22S motor? 6500kv vs 3200kv , their about $44 bucks on Amazon and that I can afford. I would like to race this season in stock class if that includes gear changes.

[@RoadsideRC]

Be careful! In my area, stock class will not let you change motors. Watch your local group's rules very closely. Gear changes are always allowed.

[@Starkster50]

@@RoadsideRC Well if that's the case it would seem Losi 22s or Slash would be the way to go. 22s 6500kv and Slash's Trans brake would be nice. I'll check because I want to run stock class to stay in budget. I went from 26/78 to 28/78 around there seems to work and keep the car under control which is half the battle.

[@RoadsideRC]

Definitely check your local groups. The only car that fits in a class around me is the DR10. The Slash and Losi aren't legal at all.

[@codyprice0295]

Was this video taken on a 2s battery? I couldn’t get anywhere near 3.5 on a 2s out of the box. A solid 4seconds every time. A 3s battery gets it to a solid 3.3. Just want to make sure, I haven’t seen a 3s battery being allowed in no prep racing yet. Although the cars are geared for 3s, we’re usually limited to 2s. If you’re using a 3s battery, then this video is null for anyone who wants to be competitive. No offense of course, you’re doing great work either way.

[@RoadsideRC]

Nope - all on a 2S lipo. Remember the DR10 was sold as a RTR and as a kit. The car doesn't have the RTR electronics in it.

[@codyprice0295]

Are there previous videos of your build? Sorry I’m just surfing here. “I was born yesterday “

[@codyprice0295]

I literally did my first test and tune yesterday. I bought the car AT THE TEST AND TUNE lol.

[@reallythough4591]

I hit 3 flat on 2s on first run with no weights. Front wheels completely off the ground at 49mph. Never got all the way on it. 150c battery, 4400kv tp motor,amba monster and 35 tooth pinion on bead locks.

[@codyprice0295]

@@reallythough4591 that wasn’t on no 3300kv stock AE motor…

[@belairjohn5579]

Great video. Thanks for the schooling 👍👍

[@RoadsideRC]

Happy to help! More in the works

[@timbreedlove1385]

I was in to rc car racing dirt carpet and pavement oval which I truly loved . I have a question in oval racing back in the day 64 pitch was the way to go but I wonder in drag racing do you guys tend to run 48 or 32 pitch?

[@RoadsideRC]

These are all 48 pitch. Some folks do swap to 32 pitch. Honestly, in my other vehicles, 32 pitch is as fine as we go. It has been many years since I have seen a 64!

[@ELM-ou4ib]

Hey I know this is an old video I see you're drifting now, I was wondering if you ever found a cheap alternative for shocks on the DR10, just started got my first car and I know I need shocks

[@RoadsideRC]

Sorry - never replaced the stock shocks.

[@dnafpv]

What do use to tune that Esc? My hobby wing programmer works but isn’t labeled correctly with any of the labels it came with? I’m getting 3.4 with that Esc and an eBay 13.5 running 25/75 I just bought 28-31t pinions to try to get more top speed

[@RoadsideRC]

My ESC requires the LCD programmer from Hobbywing. It gives a good amount of features, but honestly - I haven't touched a lot.

[@dnafpv]

That’s what I have but it’s labeled wrong. It comes with different labels for different Esc’s but not the bl120

[@juancruz-cc3gz]

I have castle 4600 kv I believe stock spur 2s 23t pinion got 3.0 @43mhp

[@RoadsideRC]

Nice!

[@justinqualls6292]

I like this video ..well edited and informative ..Iv got a mamba c and a 7700kv castle in my dr10 and iv been playing with the gearing alot . Iv been 2.45 at 54mph so far .

[@RoadsideRC]

Very nice! That is moving along for sure!

[@xmaverick59x66]

What gearing

[@justinqualls6292]

@@xmaverick59x66 87 spur 22 pinion

[@justinqualls6292]

@@xmaverick59x66 iv been 2.38 at 55mph as of last week

[@GreatBirdOfHope]

Anyone know what gearing for me to run a 5700kv castle sidewinder?

[@TheWigg]

I have a lot of stuff on backorder but i need help with gearing on a tekin g4 eliminator 5.0T motor. 2S batt, RSX Pro esc

[@RoadsideRC]

Just like I did in this video, keep stepping up the gearing until it stops getting faster!

[@extremercbashers9975]

Another great video what was the C rating of the battery

[@RoadsideRC]

The battery is a Dynamite Reaction 50C. More info on C-ratings coming soon!

[@jameybate3336]

You need atleast 100c

[@Danny.fb6]

I’m new at this hobby, is this 69 the spur gear?

[@RoadsideRC]

Yes!

[@Danny.fb6]

@@RoadsideRC do I need to do anything dofferent to make them fit or is that direct on bolt on?

[@Danny.fb6]

@@RoadsideRC I just tried on the 69 spur gear & 31t pinion. The car goes quick when I pick up the car but when I put the car down it goes quick at the first second but then bugs out. Eventually it’ll stop & esc blinks red. The battery is at 7.67v at the time.

[@RoadsideRC]

@@Danny.fb6 the esc is not powerful enough to pull that load.

[@kenengland7904]

Is that the sky rc speed meter your using ? And how do you like it ?

[@RoadsideRC]

LOVE IT! Highly recommend it, especially if you are going to be doing drag racing. It tells you so much more than the normal GPS units I used to use...and costs a little less to boot! I also recently used it just for normal speed runs and it was nice there also.

[@jerroldtaylor3047]

Awesome demo

[@RoadsideRC]

Thanks!

[@jaxxon3998]

Not related to the video... Just wanna ask if I can also put a gyro on my awd D4 and what do you think will be the difference in handling?

[@RoadsideRC]

No help in AWD. Would probably make the car rather hard to drive.

[@jasonjax3365]

Are you useing a 2 s

[@RoadsideRC]

Yes

[@R.C.DADDYHAWAII]

Need to learn how to use my gps., Great stuff man.

[@RoadsideRC]

They are very handy tools!

[@Ledsrule1]

That was really cool Good testing

[@RoadsideRC]

Glad you liked it!

[@jasonbarnhill5006]

What kind of battery do you run

[@RoadsideRC]

2S. Look for a high-quality battery, 100C.

[@tedsimington7654]

How far were you traveling? thanks for sharing👍👍👍

[@RoadsideRC]

It was the 132 feet.

[@momogt09]

Was this with stock motor and esc

[@RoadsideRC]

No - I bought it used as a roller. It has a Hobbywing 10BL120 and Castle 5700kv motor.

[@momogt09]

Thats aTrue Street eliminator set up to me the low turn motor are more pro mod just my opinion it's all fun though

[@KurtsRCs]

Nice testing you got some good hits

[@RoadsideRC]

Thanks 👍

[@quinnquinterandesence5974]

What ESC/Motor are you running?

[@RoadsideRC]

Old Hobbywing 10bl120 ESC with a 5700kv castle motor.

[@delonking7787]

Is it a stock motor and esc

[@RoadsideRC]

It is not the RTR. The setup is in the video description.

[@robertbruhn6838]

How do you get your 69 spur gear on,my 69/22 won't meet up.I extended holes,but Trans case won't let moter slid up.If anyone can help Thanks

[@RoadsideRC]

I used a dremel and elongated the motor mounting holes to allow for more gearing options.

[@robertbruhn6838]

I did try that but the motor won't slid far enough forward

[@christiansrcs7789]

Why do people do a burn out before the drive?

[@RoadsideRC]

To warm and clean the tires. Makes a HUGE difference! There is even a lot of testing of asphalt burnout, vs on carpet, vs in chemicals!

[@christiansrcs7789]

@@RoadsideRC oh I thought it was just for show 🤣😂

[@troybolton4055]

Definitely not for show. It's literally the difference between spinning out and crashing or having the car launch and do a laser straight run.

[@christiansrcs7789]

@@troybolton4055 oh

[@fredsca8349]

Are you running 2S or 3S ?

[@RoadsideRC]

2S. All of the classes around me are 2S based.

[@jasonchewning2536]

Most I can get out of mine on stock gearing is 24 mph on 2s you have to be running 3s

[@RoadsideRC]

@@jasonchewning2536 I never said this car was stock.

[@billynichols1008]

I'm running a 18/87 in my dr10 with a mamba x and a drag master 4.0 u can't gear low turn motors like u can a stock dr10 13.5 motor they get way to hot

[@RoadsideRC]

Makes sense!

[@gman2884]

What gearing would you start with on a slash with a trackstar 13.5 witch they say is 3040 kv?

[@MoBay876rc]

Like #67 great content its all about testing and tuning gears make a big difference

[@RoadsideRC]

You are right! I am pretty sure these races are won in the pits!

[@Mikeytats]

Live RoadsideRc on Saturday and a DR10 video on Sunday? You're spoiling us Troy. Thanks for another great video.

[@RoadsideRC]

Thanks for the support! I appreciate that.

[@jrc-fabs1634]

Great video love the effort👍

[@RoadsideRC]

Thanks 👍

[@TheWigg]

2S or 3S? Assuming 2

[@RoadsideRC]

Yep, 2S.

[@tedsimington7654]

Thanks so much for sharing sir👍👍👍👍

[@RoadsideRC]

Hope it was helpful!

[@mustangracer5124]

Ughh.. what IS the 'stock pinion'?.. give numbers please.

[@RoadsideRC]

This car was a roller, so no stock pinion existed.

[@andychillin2579]

Great testing and information 👍

[@RoadsideRC]

Thanks! Glad it was useful!

[@dboogeman2002]

Very informative video. Thank you

[@RoadsideRC]

Glad it was helpful!

[@kennybister7468]

I'm running a 28/81 in my dr10 it not too bad

[@RoadsideRC]

What times are you getting with that gearing?

[@kennybister7468]

@@RoadsideRC i don't know the times but the mph is 49-50 witch I think will get better once I get better Tires and fix the bowing Problem in the front

[@FinallyFreeGamersAssociation]

Good video

[@RoadsideRC]

Thanks!

[@sbass32]

Add a sway bar and a different wheelie bar and you will be shocked. Running the same times more or less on stock gears.

[@RoadsideRC]

Nice! Thanks for the tip!

[@ruftime]

Nice Troy! Electric motors make full torque from zero speed.......adjust your gearing accordingly😎

[@RoadsideRC]

Exactly!

[@DevastationMtrsports]

But kv and rpm matters.. Curious about gearing for different rpm motors? The VXL traxxas is pretty low rpm compared to some others.. What should we look for in trends for different rpm/kv motor combos for the rtr cars like Traxxas vs Losi vs the DR 10? Thanks

[@islandrc-duke1972]

Cool information and video

[@RoadsideRC]

Glad you enjoyed it!

[@IowaBudgetRCBashers]

Grayson and I both want drag cars

[@RoadsideRC]

The DR10 has been on sale for crazy cheap recently

[@robertruiz5417]

You are absolutely right the driver has to do the testing I am very fortunate to be.A RC pit crew technician I test products all day in real world rc car uses for rc everything to all brands drag racing crawling on road off road you name it it has 4 wheels and its RC I test it

[@RoadsideRC]

Very cool!! I bet you could fill a book with what you have learned!

[@robsrcinsanity1220]

Great info 👍🍻

[@RoadsideRC]

Thanks 👍

[@PIZZA_and_NITRO]

*These are not stock electronics in this test* Be aware of this when comparing your stock dr10 with different gears and not getting anywhere near the same mph.

[@RoadsideRC]

That is correct!

[@4255Lee]

I’m about to see what a 24/75 would do

[@RoadsideRC]

Great! Keep trying different things to see what works best!

[@troybolton4055]

That's too low of pinion. 26 would be much better. It may cog a little off the line, but it will more than make up for it on the big end. Just make sure your tires are good and warm for when the power hits.

[@4255Lee]

I put the 26 on today 💨💨💯💯

[@RoadsideRC]

@@4255Lee Make a big change?

[@4255Lee]

Perfect

[@LesAdventuresdeschtisNomade]

cool video excellent 👍

[@RoadsideRC]

Thank you 👍

[@zdattonejones6709]

Very pleasant

[@RoadsideRC]

Thanks!

[@laruelayton3626]

Must have gotten a really nice one, guys in our group have them none of them did more than 26 mph out the box no gear change nor slipper clutch. So this is rather misleading

[@RoadsideRC]

Not sure how it is misleading. I tell the motor and esc I am running in the car. Never said it was a RTR.

[@troybolton4055]

A buddy at work and I both have DR10s with stock electronics. With gearing in 30-28 pinion range and a 75 spur, the cars run 3 flat (sometimes 2.9) on the GNSS and at the local track. In fact, they run so well, the track changed the rules and won't let us run the 13.5T class anymore As mentioned, there is a point of diminishing returns by gearing up. You can get faster trap speeds but the ET doesn't really improve. And another point that was made, battery voltage drops off fast and temps start climbing Another part of the puzzle is tire choice. Hoosiers hook well but are heavy. Reactions without foams are around 16 grams a piece lighter but waste a lot of battery getting warm. The Raw Speeds with foam seems to be a Goldilocks setup for me as far as weight and grip

[@robertruiz5417]

We need new videos

[@RoadsideRC]

New ones almost every day!

[@marksmith685]

Was that 2s or 3s battery

[@RoadsideRC]

2S to align with the drag racing rules

[@soloshooter5806]

fyi...gearing is half the battle, re-grease your diff ,1 million weight will keep your launch even and strait.,

[@RoadsideRC]

Thanks for the tips!

[@cindygigliotti3538]

I like the 22/87

[@RoadsideRC]

Nice middle-ground.

[@brandonstover8867]

This guy is running 3 cell so this video is useless to use in racing

[@RoadsideRC]

I did not run a 3S. This was all on 2S.

[@brandonstover8867]

How the hell are you getting that speed on 2 cell??

[@RoadsideRC]

I show the full setup in the video.