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Only $10 for all 2026 SX, MX, and SMX series.
They were probably stolen from a dealer or warehouse if they're legit. FYI, OEM packaging is the easiest part to counterfeit. Amazon is where the kingpin of stealing from Home Depot was selling his stuff.
Another vote for the RK gbmxu chain, they seem to last forever and are very lightweight with minimal growth. I run primary drive steel sprockets as they are the cheapest I can find in 53t. I am having a hard time justifying going to a better sprocket, you can buy many $22 steel sprockets for the price of one higher end unit. I will say they are not the most durable but again for the money it's hard to complain.
Get the Dirt Tricks Ironman, it will still be on your bike when you sell it. Tag made the best aluminum sprockets I ever tried, but the Ironman is top dog.
I'm a big fan of the DID X-Ring series chains. Low maintenance, long life, and reliable.
Dirt Tricks and RK MXU
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Ive had good luck with JT racelite for cheap aluminum sprockets and firepower x-ring chain for those on a budget.
Dirt tricks rear sprocket, any top quality O-X-Z ring chain and OEM CS sprockets.
Change the CS sprocket as soon as you see it showing visible wear (20-40 hours for me) and the chain / rear sprocket will last a hundred hours or more.
I got almost 200 hours on a dirt tricks/KTM OEM Regina set that way. The exterior of the chain was seriously worn, but the adjustment was almost unchanged.
@ZachS @UGOTBIT @sandman768 @50dippin - where are y'all buying the MXU chain?
The chain roller has a bushing and a pin. If you lay your old chain on the floor next to a new one, it will be longer. That distance between the rollers is what wears your sprockets out.
…these guys were starting to freak me out considering I just put two of des beaches on my ride?
That’s hilarious
I used to find good deals on ebay but that has appeared to dry up and I am concerned about knockoffs.. so I have been buying from local dealer….
Are you sure it's that distance, or is it the front sprocket pulling the chain forward and the chain pulling the rear sprocket forward? I'd think the mud, sand, and corrosion along with the force that causes wear. Why would that distance cause more wear as long as it's still in spec? I mean if it's way worn out and the roller lands on top of the sprocket tooth it would, but hopefully by that point you've replaced it.
Stock sunstar 149 hrs
He's right, stretched chain causes significant wear to both sprockets.
If it's still within spec, how is it causing wear? I ask because I switch sprockets all the time with used chains with zero issues of excessive wear on new sprockets.
Ok I'm drunk and I'll play, when any sprocket wears out put a new sprocket with your old chain and see how long that lasts...
Rental rear sprockets are made from Playdough.
Supersprox steel rear (JT steel if Supersprox is out of stock)
JT Front
Parts Unlimited x-ring chain : I am not sure who manufactures it. But it is made in Japan, cheapish, and iron tough.
I was a dirt tricks guy for a long time but had a rear sprocket fail that wiped out a wheel and swingarm. Luckily it happened on the ground not in the air. Currently running a twin ring on my 350. I’m guessing I got the rare one that had some sort of defect because I had zero problems in the past. I keep thinking about going back to one but can’t quite do it yet.
Pit Row
I have found that the Regina RX3 beats a DID ERT3 chain in all aspects (longevity, performance and price).
Combined with Supersprox sprockets.
Only way to know if it's in "spec" is to measure the pitch. Once that begins to change, sprockets will suffer.
You will see more "side play" when this starts too.
I get mine from amazon, haven't had a problem with them yet
When the chain and sprocket have the same pitch, each tooth engaged with chain has some of the load. As the chain pitch gets longer, only the first few teeth are fully engaged, so they wear the sprocket faster. The teeth get thinner to match the increased chain pitch, the chain continues to grow, the teeth get even thinner, the chain stretches more and pretty soon you're losing teeth like a 7 year old at a taffy convention.
When the chain and the sprocket have the same pitch, wear rate is much lower. Well lubricated high quality chains don't stretch much, and when in specification and mated to non worn sprocket should be just fine.
Any details on the circumstances? Engine torque, heavy braking, possibly bent first from riding with Vince Friese?
Basically what I've been saying, it the chain is in spec it'll be fine, no reason for people to throw away a good chain because they're worried about changing the rear wheel with a different sprocket mounted. This also brings up another point, sealed chains and steel rears for the win.
Also eBay and Amazon, but only buy from legit places that have store fronts or are in the most biz. There was some questions about knockoffs recently, but mine have been good to go, but I’ve only bought two as they last so long
What I saw was “if the chain rollers are round“, that has nothing to do with it. You need to get a pitch gauge and measure the length to see if the chain is in spec.
You can butter your toast with Renthal aluminum....
Garbage.. Renthal = Marketing Driven company, not a product driven company...
Just received my RK GBMXU 118 link chain from Amazon prime…110.00$ shipped…that is the cheapest have found lately….for some reason RMC does not sell this chain…thats where I buy a good amount of parts unless I have contingency $ to burn up….
I was inspecting my Dirt Tricks sprocket yesterday, it has 35hrs on it. I seen what looked like a few cracks that would fail, similar to yours. I have a new replacement and it has the same lines on the very thin area of the sprocket, where yours failed. The new sprocket has the same markings, appears to be welded and ground down….Maybe this is how they are manufactured, but I will definitely keep an eye on the area….did you ever contact Dirt Tricks so they could see the sprocket?
Regina rarely hv to adjust it. Sprockets R custom made for the DBP.
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