Someone who claims to be able to solve my problems by selling me something always makes me wonder if he's got an agenda that's more about making a profit than actually following sound engineering practices. Changing a tire's scrub radius and the load geometry on a bearing might be OK, or maybe it's not. The original designers probably did their homework pretty well before they decided on a specific configuration. When my engineer brother does contract computer modeling for Ford, General Motors, Chrysler, or U. S. Navy missile guidance systems, he charges his time out at a rate of $1,000.00 a day. I wonder how many aftermarket parts suppliers can afford that kind of research?
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!