So I soon will have an rf90 (before xmas even!) and need to order some tires however I have a problem. Because the ld200 is so low speed gearing challenged it's going to take a combination of cwp, gears, and reduced tire size to get the car where I want it (47mph 1st is the best I can do).
Now I assume the car was designed by van diemen to run a 20.5x6-13 (21" dia) front and a 22.5x7.2-13 (22.6" dia) rear. I need to drop that 22.6 down to the 21.0 size of the fsae intended 20.5x7-13.
I can see several problem associated with this: the lower profile rear tire definitely has a higher tire spring rate than the taller FF rear tire. I'm not entirely sure but I think this would raise the rear roll center a few inches. Possibly a change of rear tire scrub angle and slip angle.
Are these problems going to totally negate the benefit of lower gearing? Will I be able to fix these problems? I was going to have to calculate new spring rates anyways but I'm not ready to move mounting points.
Thanks for any suggestions
Ben