Chain kits
Tiardey CP101125
A front and rear sprocket set for tuned go-karts, ATVs and mini bikes, with a 55-tooth rear sprocket of 29 mm, a 12-tooth front and a 146-link chain.
What the seller commits to paper
25H chain. Rear sprocket 55 teeth at 29 mm. Front sprocket 12 teeth. Chain 146 links. For tuned go-karts, ATVs, motocross and mini bikes.
Four numbers, all of them in the title.
What 25H actually is
A quarter-inch pitch roller chain — half the pitch of the 420 chain on the kits beside it. It belongs to karts, mini bikes and light machinery.
That makes this the odd one in its own family, and the difference is not a variation: a 25H sprocket and a 420 sprocket share no dimension at all.
Reading 12/55
Twelve teeth driving fifty-five is a very low ratio: strong acceleration, low top speed, and the engine turning fast for the road speed reached. On a tuned kart that is the point, and the maker states so rather than claiming both acceleration and speed at once.
The rows this seller leaves empty
The material. A sprocket is a wearing part and steel grade is what decides how long it lasts. One kit in this family publishes 45 steel and alloy; this one publishes nothing.
Availability
Between 11 € and 14 € across the German, French and Spanish Amazon stores, in the single reading behind this page.
Priced in local currency, which the euro range above deliberately leaves out, it also appears on the British Amazon store.
More than 1.6× what the cheapest country asked was being charged on the Italian Amazon store. A gap of that width usually points to goods sent in from abroad rather than a seller on the ground, so that amount stays outside the range above.
An entry with nobody selling against it sits in the American Amazon catalogue.
What Keepa returned in the single reading behind this page. Availability and prices move without notice.
Prices quoted in this text were read on 18 September 2026. The live price is at the top of the page.
