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โก Upgrade your ride with precision power and unstoppable durability!
The RUTU 420 Rear Sprocket features a robust 45-tooth design crafted from heat-treated 45# steel, ensuring exceptional strength and corrosion resistance. Engineered for Chinese 50cc to 170cc dirt bikes, it delivers enhanced chain grip and reduces friction to prolong chain life. Compatible with a 420 chain size, this sprocket includes all necessary mounting screws for a quick, reliable upgrade that boosts both torque and top speed depending on sprocket size adjustments.



| Customer Reviews | 4.5 out of 5 stars 188 Reviews |
Z**L
great sprockett
mounted right up to my ssr125 no problems, the only thing is i wish the bolts was slightly shorter, but a angle grinder fixed that issue.
T**D
Perfect to get 50mph out of the X1 Spark and similar emotos 60v+
This fits the emoto rims great! Make sure you get the appropriate sproket for the rim.
A**A
Good job
Fits perfect and works well!Made to last Good Job ๐๐ฝ
J**E
Appears well made.
Shipping time expressed was actually faster than they claimed which was like around 2 months. It arrived in like 2 weeks if I remember right. Either way I was surprised to see the package arrive when it did. Understand that I couldn't even find another anywhere, so... I'm pretty happy. :)
B**B
Heavy!
It is really high quality for the price
K**M
Works great
Works great
W**S
Meh
The holes that are drilled are off center. Attempted to drill them out like other reviews said, and the sprocket ended up being unbalanced. Without modification, will not fit a grom clone. My clone is a 22 RPS Condor 150cc.
R**N
Good parts
Good parts
Trustpilot
3 weeks ago
1 month ago