Jockey wheel advice needed

minterno

hi guys,i changed my lower jockey wheel today and put on a 10T instead of an 11T,i was on my way home from the bikeshop this evening when it dawned on me that i never checked to see if i got the right one off the lad in the shop so i pulled in to see if i got the 11t one but i was after getting a 10t one by mistake and it was too late to turn around and try to change it so just to get out for a ranmble i used the 10 tooth one,im wondering is it ok to leave it in place or would it be best to get an 11t,as it is now the top jockey wheel has 11 teeth and the lower one has 10, The bike is a 2010 defy3 with shimano sora derailer,regards

victorcarrera

Unless you do very high mileage on the same chain it should be OK. The theory was that half the teeth on the older 10 tooth wheel wore out quicker than the 11 tooth because the same teeth always engaged an inner chain link. Using an 11 or odd number wheel evens out the wear. And for the purists, there is a slight transmission loss and accelerated chain wear due to the smaller diameter forcing a sharper bend on the chain. Lift the chain off it and rotate by one tooth every so often and you should be OK.

minterno

thanks for the reply and info,i can tip away for a while so until i get the original ones,regards