Pierre, according to the IBLS standard chart, a 7-1/2" ga. piece of equiptment, having a track gauge of 7.50", has an outside to outside flange measurement for the wheels of 7.440" +.000-.020", or a difference of .060"--.080". Hope this helps. If this is not the gauge you need, let me know and I'll check the chart for you. Al Messer --- Pcx <pierre.courbouleix@xxxxxxxxxx> wrote: > Hi LIst, > Our tracks are defined by the gauges and we have a > well established standard for the wheels but what is > the clearance between wheels/rails for each gauge in > order to have a good, smooth running? Is it > different for a straight/curved portion of a track? > That's all for today. Thanks. > Pierre > pierre.courbouleix@xxxxxxxxxx > > MODEL ENGINEERING DISCUSSION LIST. > > To UNSUBSCRIBE from this list, send a blank email > to, > modeleng-request@xxxxxxxxxxxxx with the word > "unsubscribe" in the subject line. > __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.