A friend needs a new chainset for his bike and the cheapest around seem to be some of the older stock of Shimano 10 speed.
Will this work OK with his existing 9 speed triple set up? Assuming a 9 speed chain will OK on a 10 speed chainring I'm guessing it should be OK.
Other than the gear ratio's changing slightly, the only other issue I can think of is maybe a difference in spacing of the rings meaning front shifting maybe a bit off?
Anyone done this without issue?