Gear teeth number

[Darthvader]

I have a SR-500 all Shimano 105 Components.The bike came from factory with six speed 13 tooth thru 23,at some point before I got it it was changed to 14 tooth to 24.Know that there was a option for a 53 tooth Biopace but don't see any on the normal sites.I think the 53 will work with 14 tooth,anyone ever try this gear ratio?

[cny-man]

When looking for something unusual it's best not to go to a specific site. All you have to do is a Google search for "53 tooth Biopace," but it's going to be pricey compared to a 52 tooth, and too little diff in gear ratio to bother. A 53/14 is only going to be good for downhill and stiff tailwinds.

What is your current larch chainwheel - not generally worth it to just increase the large chainwheel by a few teeth.