Hi, yes, 1929 can have a webb forks. They are different than standard once. As I know, 16-19 mm tubes were usually used for 350 cc bikes, I think Scott should have 16-22 mm. As I know, Scott webb forks should be little bit different, top part between the pivot of the links should be slightly higher, once I got the information they are same as for Cotton. I will try to find some more informations, of maybe someone else knows more?
Took me some time, but I found some informations. Not sure if it’s correct, maybe someone who has original webb forks for Scott could confirm? This is information I found couple years ago:
Overall length from centre of top fork spindle to centre of (1/2 inch diameter) wheel spindle : 16.750 inch
Length from centre of lower (friction damper) fork spindle to centre of top spindle : 9.000 inch
Width over fork at top spindle : 6.062 inch
Width over fork at middle spindle (damper discs): 6.280 inch
Wheel mounting width between 1/2 inch wide spindle slots (inside legs) : 5.250 inch
Brake torque stop/tongue is 1/2 inch wide by 1/4 inch thick.
Radial distance of middle of torque stop/tongue to centre of wheel spindle is 4.750 inch.
😀 😀 Just had a quick look on my 29 Short Stroke 500 Flyer.. All the tubes are tapered. I don’t have calipers at the moment to check the diameters. Plus who knows if my forks are origonal after 90 yrs! .. Regards Ted 😀 😀