Folks,

The recent correspondence on old LNC2 tires prompted me to replace my 1990 vintage originals with new tired from ACS, sold as “Lamb” but labeled “Cheng Shin.”  Unfortunately these are slightly larger diameter—the profile is rounder—and the clearance from the closeout rib is reduced to about 50 thou with the wheels fully up and 40 psi pressure in the tire.  It’s close to the hydraulic cylinder pivot bolt also, but that could be fixed by replacing the hex head bolt with a countersunk structural machine screw.

 

Can anyone offer guidelines on minimum clearance here?  I’m concerned that with use the tires could become more flexible and possibly jam in the up position.  Does anyone have a diameter comparison between Cheng Shin and the Desser(?) or other alternatives and suggest a supplier of smaller tires?

 

Thanks in advance.

 

Chris.