RECEIVED TRACTION TIRES FROM BACHMANN-WHY SO BIG?

[darticus]

I called Bachmann about both traction tires coming off my Spectrum N Norfolk and Western J Class after 2 hour of running and they sent two different size traction tires back saying they changed the set of wheels they put the traction tires on. Not sure what this means but both these tire sets they sent are as big as the tires that are falling off the N&W. I went to the local HS and they sold me tires for steam locos that are very small tires, like braces for your teeth rubber bands but stronger, that must be really stretched before you can get them on. Which are correct or are both correct? Will these big ones they sent just fall off again? Is glue needed? Ron