4-Pack HobbyPark 12mm Wheel Hex Drive Hubs Combiner Coupler Aluminum 20mm Offset Extension for 1/10 RC Crawler Car Parts (Blue)

So far so great 25mm got me out about an inch and seems to help a lot for cement pavement driving with it being just a tad bit harder to tip with all the grip i have. They did require some modification though. The hub extenders come with and require a thicker axle hub pin so if have standard 12mm hubs you will have to drill that slowly and straight ! To be sure you are just the right size for bigger pin and not to big at all, a nice, barley fit , snug fit is what you want . I also had to drill the wheels mounting lug out for the size of the screw on nut ! This is super easy as well. Same ordeal nice and slow . Stay centered and as straight as possible and work your way up to size needed for a nice tight fit. Took about 15 min. With not a very good choice of tools at hand . I used a 9 dollar Dremel tool and thats what took me so long , but got the job done and further pushed me to go slow no matter what which gave me plenty of time to ensure straightness and size was tight and correct. Other then that they work and are super nice !

The wheel nuts are pretty much the bare minimum of length, I had to try 3 different types of rim to get one that these could even reach the threads through and they were all popular, name brand wheels.On the first test drive one of the nuts snapped off despite being torqued correctly and threadlocked. Thankfully this was an indoor test so I didn't lose any of my other parts.

Love the way they space the wheels out. Looked great. Problem is i have larger aftermarket wheels & the hubs are thicker.. In turn, the center hub bolts ended up being too short for my application & only caught a couple threads apparently.. First time out it came undone, lost my wheel, pin, spacer, & center hub bolt. Got my wheel back, lost the rest.. moral of the story is check your application before running or get ones with longer hub bolts.

Bought the 15mm extension for my Big Rock. The shaft diameter was too small, but easily drilled out to fit. The pins were a little sloppy,so I used my original pins. What was really disappointing is that the hub screw that’s help the tire on was too short to reach the threads. Fortunately, I had also bought a 20mm extension set and used that nut to make it work. Would’ve liked to have had the recess that slides over the pin be cut deeper, looks very shallow to me

They were the right size just didn’t fit my Traxxas trx6 crawler so had to take the Dremel to it but they work now and look great 👍

Should have read it more closely. The 12 mm hex hub fits the tire, but your tire rim needs a 5.5 mm axle hole. The bolt is M4 which fits the axle for the vehicle.Well, if you have plastic rims that fit 1/10 cars, these axle holes are 4 mm (that is why you use a 4 mm nut to secure your tire) - you either have to ream out a new hole or drill.

Excellent product, does exactly what is described. Fits perfectly on my Redcat Gen 7 Pro. Very simple install, takes 2 seconds. Only “con” and this has absolutely nothing to do with the seller is your steering radius gets ruined so be aware you’re gonna need a stronger steering servo if you want to make tight turns. That’s just the name of the game when you want a wide stance LOL. Thank you very much HobbyPark for the excellent product. I couldn’t be happier with how it turned out.

Bad fit, internal diameter of the hub coupler bigger than the axle. Had to modify by wrapping smooth non threaded portion of the axle with Teflon tape, worked well as bushing, but has to be replaced periodically