Why do i rate leda better?
Quite simple, their damping characteristics are better.
Sure they might not be all ally or 'monotube'...............but as we've discovered, thats not something you want for a car that will be experiencing a multitude of surface conditions.
And before either of you shout bias, i'm not trying to flog either to anyone, so i'll just give my honest opinion (unlike andy's opi-onion
).
The monotube design and shim stack valving leads to one thing, despite its 'technical' design superiority, and that is narrow range of adjustment. All race cars might use monotubes to cop with heat better, but damper companies also have a support truck around to revalve the dampers. Not exactly an example of adjustability, especially when track condition stay the same, bumps and surface changes are always in the same place and the line stays the same, the small changes still require revalving.
Twin tube design do suffer more from heat capacity overloading, but i highly doubt many people can actually push a damper hard enough to fade even on track given the average drivers abilities. The benefit is the massive range of adjustability on a single damper, from softer than stock to litterally immovable. The quality of the damping on all ranges is superb, rebound is controlled and the car doesnt ocillate. Plus the leda's use a 2.5" rear spring so you have endless choices of off the shelf spring rates and no waiting times, they retain the std rubber sound dampeners and the ride down B roads is so controlled. But they most certainly arent biased towards road use, as they will go harder than the billies. And i've not seen a dyno chart for the billies, but the ledas had such a perfect curve, and the diff speed testing mirrored the curve perfectly.
Factor in cost and the choice becomes easier, for me.
Infact, i bought another set for my other car 30 secs after i drove them (already have them on the scoob), and also for the 3rd car....so all 3 cars are running leda, so i must be really really gay.
Just for arguements sake, thats my opi-onion.
p.s if your really serious and want monotubes, leda has always made them, and they have high/low bump/rebound adjustabulity with remote canisters with yet more shim stacks........depends if you've got over 5 grand though for a pretty dedicated shock.