Even with wheels that have very little backspacing, you will still see significant steering benefits with the PRO 1550 knuckles. Cindy and I wanted to run 5.5" of back spacing because it offered the most benefits as you seem to be aware of. Is it really necessary? No. We just wanted to take advantage of all the improvements Dynatrac made and weren't available in the past.
I have a quick question if you don't mind. I am ordering an XD60 front this week and really on the fence whether to get the 1550. Dynatrac is recommending the XD60 with 1480's because I have plans to run the DTD setup and Steve mentioned Mel orders all the XD60s running DTDs with the 1480. He said it had something to do with fitment of the DTD setup and the 1550 on a 68.5" wide axle (potential lack of space maybe?). I know You, Mel, Randy, and many of the others running the DTD have driven and beat the crap out of the Prorock60 for a long time with it holding up great.
Any thoughts?
It's about a $1300 difference to move to the 1550's from the 1480's ($9400 vs. $8199). My wallet and wife say 8199, my brain says 1550 to have the best of the best.
Thanks again! I'm pumped either way I go to get an XD60!
If it matters, I'll be running 3.5" BS trail readys and 40-13.5 Trail Grapplers.